In the last class we were looking at brush model right and then we moved on to what we called as a magic formula model which is due to Praseka right and we saw that the basically the first model that was put forward in the Praseka model, tire model is to fit the experimental curves that were obtained during tire testing right and we will now slightly go into the details of tire models before we I think we have to quickly go to the lateral dynamics. We would not have time to go into completely the tire models, there were some questions on in fact what happens during combined slip we will spend a few minutes on combined slip before we go to the rest of the topics including the tire model but there were lot of questions on tire models of the class so let me let me explain this. This is from a paper in vehicle dynamics, a vehicle system dynamics this is the reference this is a very nice figure, volume 43 supplement 2005, 1829, Alex Eichenberger and Marcus. So this is the this is a paper just there is a reference for this and let us just quickly run through this so that you understand what we mean by tire models. As I told you earlier in the class it started that a lot of codes that are multi-body dynamics codes that are used and multi-body dynamics becomes extremely important because of the fact that there being lot of companies use it and that the companies look at how to optimize the vehicles and so on right so they use a number of softwares. The software that is used depends upon the reason or why they use this or in other words it is not one comprehensive software and one comprehensive model but there are a number of models and the models also depend upon the reason for which they are doing an analysis okay and a part of it is a is the tire model. Please understand that we are looking at dynamics of the vehicle, we are looking at oscillations be it cornering or be it ride or whatever it is we are looking at oscillations and the oscillations or the frequencies of oscillations that we are looking at covers a whole huge range okay and the models that you put in should be able to simulate okay or get you the results in that frequency range clear. So there is a frequency range and an amplitude yeah we will come to that a bit later but before that okay let us understand yes I understand what you are asking let us look at this figure then you will see what we want to say okay. So the vehicle oscillations can be classified in terms of frequency of oscillation okay and the amplitude of oscillations right. So yes when you talk about oscillations immediately you think that there is going to be a bounce you know vehicle goes over a rough road and you see that you know bounce and so on and immediately you have a tendency to sort of map this word oscillation to a vertical oscillation right but it is not necessary that it has to be vertical that is what we are going to see now okay and you will see that when we talk about oscillations it covers a gamut of things right it is like like the whole electromagnetic spectrum which we talk about when we talk about light we talk about sound and so on like that you have a number of you know the whole gamut of things that we are going to look at various frequencies and amplitude right okay. Now at the lowest end we look at what are called as quasi-static models where we study the suspension kinematics okay you have studied say for example 4 bar linkages and so on in your earlier class on mechanisms. So you use that kind of concept to understand actually when you give a steering input how say for example the steering linkages move okay what is the arc that it covers and all those kind of things okay. So you use the fundamental concepts in theory of machines or kinematics of machinery which you have studied in order to understand that okay so that is the quasi-static models right the amplitudes may be very large because you are looking at when you turn a steering how things move and so on and many times the models that you use for a tyre in this case is a finite element model you know simple static finite element model and so on right okay. We will come to this tyre models in a minute. Next in the range look at this you know this amplitude can be large. Next is what is called as the handling models handling models please note models simply means equations. Next we talk about handling models we are going to do that from this class may be starting from next class right we are going to look at the forces that are acting the accelerations and so on we have already seen this for the longitudinal case handling is more to do the lateral forces and the lateral dynamics and that we are going to see as the next step and so we are going to look at handling models. In these cases as you are going to see now you consider the chassis as one rigid body and look at how for example the chassis is going to yaw or the body of the vehicle is going to yaw is going to roll and so on right. So we do not go into the details and usually this kind of models look at a picture where we look at the whole chassis as one group of components yes good question. So what is that we are looking at there we are looking at various frequencies you will understand that because this depends upon see when we look at handling it depends upon the frequency of the whole vehicle of the vehicle at various modes or in other words in various directions in simple terms. You would see that we will come to this handling when we take a turn you would see that certain frequencies which are the result of the whole of the vehicle mass moment of inertia and so on are going to have a role to play and those frequencies are in this range or in this range. The frequencies which are going to play when we look at lateral dynamics handling is about 4 to 5, 3 and maybe 2, 3, 4 you know that is the range yes of course see the point is this is it that I am neglecting all this no what we are saying here is that we look at different frequencies to look at the effects look at the effects for example if you are looking at noise yes you may be cornering manoeuvrability if you are looking at manoeuvrability of the vehicle and so on the frequency range I am looking at is this but at the same time I am looking at the NVH the vibration characteristics and so on and then I would comfort for example I would look at these frequencies I am looking at actually acoustics I would look at higher frequencies it is the vehicle is moving it is that you are artificially distributing it at these frequencies and studying the effect at these frequencies go and study when I say that go and study the frequency at this range which means that you are looking at handling and that is the result of the characteristics of the vehicle when it takes a corner right and the ride for example the next set of frequencies that you are looking at is the ride please note why am I saying this please note that the model should be capable of capable of representing the vehicle in these frequencies it should be able to represent the vehicle in these frequencies okay suppose you take a simple model what we are going to see but for example bicycle model for handling okay then if you tell me that I want to study the acoustics okay with this kind of model you would not be able to study okay because it will not produce the kind of frequencies the natural frequencies of modes or whatever you call it we are going to give some names to it okay these things will not be represented by that mathematical model okay so there is no point in having a simple model which we are going to say I mean study and say that I am going to study this because that model will not represent the behavior of the vehicle at these frequencies does that point make it clear but as a vehicle yes as a vehicle it has various spectrum of behavior as a vehicle okay but many times I would not be able to take everything together and start working and my interest also may not be on all these frequencies right it is not yeah yeah yeah okay the frequency range may be maybe this side that side but it is it is around less than 10 okay let us look at the next set of frequencies I will take the question after I finished this okay then we look at the next set of frequencies we are looking at a ride okay looking at ride ride usually is divided into two categories okay one is what is called as the primary ride and the other is what is called secondary ride purely in terms of the frequencies the lower frequencies at 10 12 hertz okay you would call this as a primary ride okay people vary when they define what is actually the primary ride what exactly is the frequency and so on but usually we will look at the primary ride as one due to the oscillation of the suspension system okay this is because of road induced oscillations and so on 10 12 14 hertz is the type of frequencies that you would call when there is when the vehicle is subjected to these kind of oscillations okay at those frequencies we call that as the primary ride but then ride is a topic which is not only affected by note this carefully there is not only affected by by the road okay today ride encompasses a much larger things okay so for example that can be oscillations of the engine transmission and so on which may be at a much higher frequency may be about 30 hertz okay so there may be oscillations of of the of the engine okay which may be transmitted and your engine mounts may not be very good there may be transmission of oscillations due to engine and so on okay then the frequency of excitation due to these factors will be at a higher level or higher frequency and that is what is called as the secondary ride right then comes harshness okay what we call as loosely as NVH that is comfort okay that is at a higher frequency at a much higher frequency so in fact if you look at the total ride how comfortable I am in the vehicle then it actually covers the whole thing okay you can also see that as I go down the frequencies actually the amplitude comes down very well known case right the amplitude comes down now you move to a much higher frequency okay which is above 100 hertz okay strictly speaking going up to 20,000 hertz we are not interested up to that because that is the acoustic range but 20 to 20,000 but we are not interested in that kind of large ranges but the acoustic frequencies which is of interest to us may extend up to about 2000 hertz yes the quasi static is where I am looking at the suspension mechanics or mechanism okay sorry steering mechanisms so suspension kinematics steering kinematics and so on yes so these are oscillations okay these are when I take say for example when I give a steering input okay how does actually what is the range to which this with the steering has an effect on the wheel and that whether Ackerman steering is completely followed or there may be error what is Ackerman error scrub radias all those things are there all those things no they are not that is why we have we are saying that it is it is at a much much lower frequency that is why we call this as quasi static very near zero it is though it is not actually static we call that as quasi static okay right we will come to that you know these are frequencies when the vehicle is subjected to that kind of frequencies okay the frequency that whatever happens is that frequency range we call that as NVH it is just for us okay to understand and give a name and I am going to talk why we have we have done this as well now I have to have these are the frequencies at which I am going to study okay I have to have models as I said which will depict these the behavior in these frequencies and one of the most important model here is what is called as the tire model the tire model okay let us go to the extreme range yes yes yes yes yes these are the frequencies okay which will excite the vehicle various components of the vehicle vehicle as a whole various components of the vehicle okay we will we will okay good question let me go into that with the tire model let us go to the extreme case okay now I want to study noise say for example I want to study tire noise okay which means that I am looking at frequencies which are above hundred hertz okay yeah that is where the usually that is a big topic usually the range are usually the range of hearing is from twenty to twenty thousand and very interesting factors have come about life for example your ear is very sensitive to frequencies of about thousand hertz okay so that is where you are you are very sensitive to this and so there are the magnitude of noise okay expressed in decibels are now adjusted and you have scales like a scale which adjusts to the sensitivity of your noise and so on so you are you are sensitive as a as a person see you perceive vibration okay due to various parts of your body right I mean so in fact we will see later when we go to right dynamics okay the last part of this course where we will look at right dynamics we will look at what is the amplitude which your body can withstand without fatigue how long it can withstand what is the frequencies what is the corresponding amplitude for example how much you can tolerate all these things we would look at it later in the course but if you look at acoustics you are what your ear is sensitive to those frequencies are about this okay your ear is very sensitive to frequency that is why you are able to enjoy music whose frequencies okay what we call in Indian classical music the Swara what what is that there is nothing but the frequency okay it comes from the Archimedes Archimedes principle of dividing the frequencies into different octave and so on let us not go and get into those details let us let us look at this model you know let us come back and look at the models okay now to answer this question like we are looking at acoustics let us see actually physically we that is been a practice in this course so I have a tire okay now the tire goes over some some rough surfaces that is snow then the tire we saw in one of the earlier classes say for example there are belts that are available in the tire okay so the belt starts now vibrating it is something you know you have done some course in mechanics it is something like a shell okay stiffened shell or an orthotropic shell okay that starts now vibrating because it has gone over a rough surface right so when it starts vibrating let us say that it vibrates like this it vibrates like this okay now this vibration of the belt okay which is actually the sum of various modes or mode shapes of the belt okay now these vibration of the belt what does it do it has it displaces so it starts vibrating like this so it takes a inner and outer shape goes up and down so when it goes up and down like this what does it do it excites or passes on this to the air okay molecules which are near this okay that is one of the things so it starts oscillating so the air molecules near it gets I mean into this oscillation on those pressure changes and this acts as a source okay for the pressure change and at certain distance you hear that as noise because these guys are displacing the air above and you know below and then that is the pressure wave that starts that is the source that is one thing the other thing is that when they vibrate okay when they vibrate they also change the forces that are acting or in other words if you now plot a force or acceleration at the axle level they also change okay so in other words with time the accelerations change and these accelerations now start okay travelling inside the vehicle and if you are sitting in the driver location you know you are going to hear that as well so in other words the noise that is produced okay passes on through the air and from the air it may be it is translated or transmitted to the door and it starts oscillating and you are going to hear all those noise so tyre for example tyre noise is can be classified into what is called as the airborne noise and this structure borne noise through the axle and gets you gets it inside and then you hear this. Now if I have a model since you ask this question now if I have a model which cannot actually capture this this kind of belt vibration you know what we are looking at is also a brush model simple model I am not able to capture this then whatever I do obviously I won't be able to capture noise hence that is why models become important so what model you use unless I have a model which I am able to capture this which is the source of vibration or excitation at that frequencies I am not going to produce that frequency in order that I hear this right okay so our simple brush model for example will be enough to do things here but then I need to keep innovating and improving it in order that we do it further yes. Why are we interested in only your sound and noise characteristics no no no I am not saying that we are why are we interested in noise I am saying that noise is one of the factors okay it is not that I do not want to make too much noise right yes every every frequencies of interest okay so if you are looking if you are going to make a car and sell it okay you are going to be worried in this whole spectrum of frequencies you are going to your car is not going to sell if you say my handling is very good but only thing is you cannot sit inside the noise is very high right engine noise is very high when you sit inside but I can handle my car handling is very good this won't work exactly so at different frequencies so that has to be now taken care of isolated so that you do not hear or you do not feel whatever is your sensory perception is of these frequencies this is very important to understand this yes this is well known fact in the industry but your students it is very important that you understand okay what we are talking about and the macro picture is extremely important for you to appreciate the course on vehicle dynamics okay I would have given this first but you would not understand now that we you know what is a tire model now you know you you are able to understand that very well okay so this is this is very this is very important for us to look at right so the tire models that are used are now different at at different in the different frequency ranges you have today a set of tire models which can handle different frequencies okay. You have for example a model called Swift model that the name itself is like that short wavelength intermediate frequency tire model right so that that may be about 70 80 Hertz and that's the frequency which it can accommodate and that's what you see here so most of these models are yes we saw an empirical model but there are semi-physical models as they are called in other words the tire is modeled as a consistent consisting of a number of springs okay mass systems and so on and that approximates the behavior of the tire we won't be able to go into the details of it we have another course actually on tire mechanics where we would talk a lot more about tire we are not going to do that in this course but I want you to understand where we talk about and I mean what we talk about and what we are looking at and so on right so this is what is the importance of time models right and this what we call as multi-body dynamics this is multi-body dynamics the the range of multi-body dynamics applications also looks at dynamic loads the effect of dynamic loads for example when you come to automotive structures you would look at this carefully you would look at dynamic loads what is a load that is transferred for example to various parts of the vehicle for example to the chassis frame okay what is the effect of this dynamic load it's affecting in other words what is the durability and all those things also will be studied what's beyond this is what is called as crash okay crash is a crash covers a gamut of frequencies very high frequencies and amplitudes are also very large so that is the that's the crash part of it okay it's a nice picture it gives you the whole thing and let's get back to what we were doing in the last class right wait for some time to get an answer so what is handling what is your how does it have an effect all those things will be studied in this course so in other words you will get into models here okay I won't be able to get into these models beyond this but I will get into models which cover this and this you know these parts are part of this course so you have to wait for some time in order to understand you know what I mean by the second thing right we will do that yes so different it's not different component of the vehicle you know this is we are talking about we are talking about the vibration of the vehicle okay induced due to various components okay for example for example when you are looking at the primary right okay you can treat this whole body as a rigid body and we are going to look at that as a rigid body right at those frequencies so in other words the frequency is dominated by the by the spring dashboard system of the suspension okay so when when I go to higher frequencies then there are contributions at higher frequencies and that may be due to bending of the chassis frame okay so in other words the source for these vibrations and the way they are transmitted and so on okay would be different right at different frequencies say for example when I am I am here I am looking at the body as a whole controlled by the suspension characteristics right wait for some time you will understand more about this as we go along okay yeah we are looking at suspension kinematics we know handling is affected by by these frequencies so wait for some time you know we will we will come into those things okay we will we will look at these things why am I looking at this this frequency why is it because this frequency when I take for example when I take a turn and we are going to look at this from a very simple bicycle model and then if I take a turn then the frequencies which are excited okay is in that range right okay we are going to look at the mathematics behind it and then we will we will understand why these frequencies why this frequency of 12 hertz okay you will see that there is what is called as a wheel hop frequency and the wheel hop frequency is 12 hertz you would understand that there is a body you know the frequency of the the whole body that would be at 2 hertz you know you have to wait you know please be patient to understand these frequencies understand this alone that that vehicle as a whole as a gamut of frequencies which can be excited okay which can be excited and so you have to understand the behavior of the vehicle at all these things in other words in other words just to just to complete this it is not that I have to excite all these frequencies in other words I can isolate frequencies okay by different means at different levels for example I can isolate completely the noise due to the engine there are ways and means by which you can isolate this noise completely but that does not mean that the technique that I use in order to isolate this noise would all make my handling better so you have to look at what you so the idea of studying this is because the solutions as a design procedure or a design problem is different at different levels so when you say that this vehicle in other words when you say simply put it when you say that this vehicle handling is fantastic but my ride is not very good or vice versa okay what is that you are saying you are saying that the vehicle behavior or you are characterizing the vehicle behavior at different frequencies that is all okay you are characterizing them that is it okay let us move on let us now look at combined slip I am not going into the details I thought I would do it but I think we are running out of time we have to move to the next topic on lateral dynamics I just want to point out that when we have combined this slip we are looking at longitudinal as well as lateral okay both of them are acting together okay in other words the forces in the longitudinal direction and the lateral direction are going to now compete with each other in order to win over the mu into f or fn right so if I now plot say for example the force sorry fx and the force f y okay if I now plot this graph this word okay because of certain reasons of anisotropy and so on would become an ellipse something like this in other words what it simply means is that this is due to longitudinal say braking or acceleration and this is due to cornering okay when I corner when I do a cornering without any lateral acceleration I am going to get the full benefit of my mu this is the boundary after which okay I am going to it is going to stop and after which I have reached the mu into fn or I have cast all that is that is in the bank called the friction forces so once I do not have any braking or acceleration okay that is the complete force that can be used in order to generate f y and that is the end okay where I would generate the complete or I would use the complete frictional force in order to get this yeah because this is nothing but the force okay qx plus qy squared okay that is the that is the force say for example force per unit unit length should be less than equal to mu into qz per unit length is what you know qz is a normal force per unit length okay and if you if you give it like this actually it should be a circle but qx and qy need not be the same you know like what happens in the longitudinal in the lateral direction forces that need not be the same because it is the forces are split in the ratio of the of the slip and so on so the practically this would not be a circle but it would be sort of a distorted ellipse yes yeah so that is the because the way it is shared is different here so ultimately say for example if you are doing both cornering and braking that is the type of you know forces that you would generate yeah this is the effects and f y see this is a this is an ellipse like this so you can say that that is an ellipse like this okay so you are putting only the one part of it actually the qx and qy is given by and I will just write this quickly when it is in the slipping region per unit length I already said that force per unit length okay so and you can derive this and I am not going to as I said go into the details you can look at Pasekka's book so derive this similar same way as you had done it for the longitudinal force now include longitudinal and lateral force okay and then you can derive this and the effects now becomes look at that I will quickly indicate after this how we got this that is fx just a minute let me let me finish this I will explain you know let me let me write down this equation and I will explain this and this would be here assignment how we are going to get this though the expression looks formidable it is not very difficult to derive this it is quite simple this is seen to sigma x sorry that is the whole thing multiplied by sigma x the whole thing multiplied by sigma y and m is it okay so essentially what is that what is that you do essentially how did you get this it is too much of noise that is going to have an effect yeah essentially how did we how did we get this we got it in the similar fashion as we did before remember how did we get this kind of expression for a longitudinal force we looked at we looked at the deformation okay remember that we looked at the deformation we looked at how much the the tread which was a brush deform as you move in into the contact patch and then at a particular point of time we said that the force is not good enough to sustain the frictional forces and it starts slipping this is exactly what you would do you would now look at the brush movement both in the x direction and the y direction so the brush movement in the x direction so you define sigma x and sigma y as given here and you would this is exactly what you did previously into sigma y now which now becomes the basis for the force in other words these are the displacement of the brush remember that we looked at the brush okay in the brush model that is the we had those brushes so now please understand that there is going to be a longitudinal as well as a lateral right both are acting so the brush that brush the bristle will actually be displaced in the x direction as well as in the y direction this is a displacement right go back and look at it this is what we did before this would this displacement would result in a force which I would call as qx okay and the force is because of this displacement multiplied by the stiffness cpx in the x direction displacement multiplied by the stiffness per unit length you know gives you the force per unit length so that would be cpx into a minus x into sigma x and qy is equal to cpy into a minus x into sigma y right these are the forces now when it slides root of qx squared that is this this whole sum of these forces okay should be equal to mu qz so in other words the sliding distance xs is determined by root of cpx into a minus xs into sigma x okay this whole whole thing squared because qx squared plus cpy into a minus xs into sigma y whole squared is equal to mu into qz remember qz we got it from the parabolic distribution in our earlier class so you can substitute for qz solving which you will get xs then what do you do you find out the total force okay because of deformation plus slip sliding rather so the rest of the region it is going to slide up to xs it is going to stick to form after that it is going to slide try this out if there is any question I will answer that in the next class okay please try this derivation see whether you get this it is not very difficult because you just want to add then integrate it you are going to get this okay so we will not go further on this unless there is a question which I will answer in the next class try this out okay fine now we will we now know that combined slip is a it is more dangerous because whatever lateral force that is required is not given becomes dramatic the case of motorcycles gives rise to what is called as high side fault okay becomes really dramatic so in other words when you take a turn in a motorcycle breaking the motorcycle and suddenly release the brake we will explain that maybe in the next class starting that so you will understand lateral forces suppose you are taking a turn braking and suddenly release the brake what really happens now it is a it is a very sharp turn young blood going fast take a sharp sharp turn right suddenly you see a kid coming across and just press the brake okay still taking the turn and then suddenly release it situation is very dangerous why is it because when I break it think about it we will continue that in the next class okay when I break it I have I am at this position you know sudden breaking right when I release it when I release it my effects now comes to zero okay immediately effects comes to zero but my f y is not is not actually is not the same as what it was before f y now actually increases suddenly so in other words whatever friction which was which the longitudinal forces holding now gets transmitted to the lateral force so lateral force becomes high lateral force should be just enough to compensate for my centripetal acceleration the lateral force becomes high whole vehicle okay turns over over turns we will explain that in the in the next class before we go to the lateral dynamics.


This lesson is on Udu substitution or an integral in the form of U, some sort of function, and the derivative of that function. Let's study the answers that you had in your lesson where you take derivatives using the chain rule. The first one said f of x is equal to e to the 2x squared. So if we want to find the derivative of that, I'm going to use a little different notation and say df is equal to the derivative of e to the 2x squared, which is e to the 2x squared times the derivative of 2x squared, which is 4x, and I'm going to put my dx on that side. So what do we have here? Well, if we make u equal to 2x squared, we find that the du is equal to 4x dx. And take note of that as you go through these, that we have that u du form sitting right in the problem when we do the derivatives. Let's do a second one. g of x is equal to sine of 4x minus 4. If we do the derivative of g, we take the derivative of sine, which is cosine, 4x, and then we take the derivative of 4x, which is 4. And then we multiply that times dx. And you remember the derivative of negative 4, which is a constant, is 0. So if we look at the u du form here, we see that u this time is the 4x. So u would be 4x, and du would be the 4dx. Again, u du form. If we take the derivative of y is equal to x to the 4th minus 2 to the 11th power, we get dy is equal to 11 times x to the 4th minus 2 to the 10th times the derivative of x to the 4th minus 2, which is 4x cubed. And of course, we'll put a dx there. Our u this time is what's in the middle here, which is x to the 4th minus 2. Our du is 4x cubed. Again, we have a constant, which will be 0 times dx. Again, u du form.  On the next one, we have y is equal to sine squared 3x. The derivative is dy is equal to 2 sine 3x cosine 3x times 3. In this case, our u is sine 3x. Our du becomes cosine 3x times 3 dx. And if we go backwards, we will get the sine squared 3x back. Again, u du form. Our last example is z of x is ln of 1 plus x squared plus 3. And if we take the dz of this, we get 1 over 1 plus x squared times the derivative of 1 plus x squared, which is 2x dx. And in this case, our u is equal to 1 plus x squared. And our du is equal to 2x dx, u du form. So as we do these, we have to think this u du form. Let's do some examples of integrals. Evaluate the following integral, the sine of 2x. Well, that does look kind of familiar. If we make u equal to 2x, then our du becomes 2 dx. So as we look at our integral, we see we have the sine of u. But our du is 2 dx, which means we need a 2 inside there to make the du. Well, if I introduce a 2 there, I need to introduce a 1 half out front. And that compensates for having the 2 in there originally. So we've put this into the form sine u du. Now we can evaluate it. The anti-derivative of sine u is negative cosine u plus c. And of course we have our multiplier of 1 half. Replacing the u with what it is, we have the final answer of negative 1 half cosine of 2x plus c. So we look for that u du form, replace everything. The only thing we can compensate for are the numbers. And in this case it was a 2. Putting the 2 in for our du right there, making this all of the du, compensating with the 1 half to make sure that everything looks the same as when we started out. Let's try another one. Evaluate the integral of the square root of 3x dx. In this case, we see that we have something to the 1 half power. So our u is going to be 3x. Then our du is going to be 3 dx. So our integral will now look like the integral of u to the 1 half power. Instead of dx being plain, we have 3 dx. So we have to introduce the 3 here, compensate outside with the 1 third. And so now we have u to the 1 half, 3 dx is our du. So we have 1 third u to the 1 half du. We take the antiderivative or integral of that. We have u to the 3 halves times 2 thirds plus c. That all becomes 2 ninths. Then the u is 3x to the 3 halves plus c. Again, u was 3x because we had this as a power. We're thinking chain rule when we do these things. You know, what is inside that power, that power being the 1 half power. Let's try another one. Evaluate the integral secant 5x tan 5x dx. Well, that looks like secant x tan x. And we know the antiderivative of secant x tan x is secant x. So we can just say that u in this case is 5x. That makes our du 5 dx. So our integral now becomes secant u tan u. And remember, we had substitute of 5 in so that we can have that du, which means we compensate with the 1 fifth out front. And so we bring the 1 fifth down and then make our du there.  And the antiderivative of secant tan is secant. So now we have 1 fifth secant u plus c. Substituting for u, we have 1 fifth secant of 5x plus c. Hopefully these are getting a little simpler for you to see as we go along. Now this one looks a little bit more complicated. But again, we look for an antiderivative that we know, an integral that we know in each of these. And if you look at this one, you know the antiderivative of secant squared. So most likely you would be that square root of x because that's a complicated piece of our secant squared x. So yes it is. And as it works out, you'll see u is equal to x to the 1 half. And then the du becomes 1 half x to the negative 1 half dx. And we see all of that is sitting here except for that 1 half. The square root of x, that's x to the negative 1 half, the dx is there, we need a 1 half on this side. Well, if we put a 1 half in with a dx, then we have to put a 2 to compensate on the outside. So now what do we have? We have 2 integral secant squared du. And the antiderivative of secant squared is tangent. So this becomes 2 tangent u plus c. And again, we substitute for u and get 2 tangent of the square root of x plus c. A little bit more complicated. But again, look for the antiderivative that you can take and then look to see where you can place that u. Here is another interesting one. The integral of 1 over the square root of 3x minus 5 dx. Well, that is equal to the integral of 3x minus 5 to the negative 1 half dx. Putting it in that form, you see that u is not a very difficult thing to find. u is 3x minus 5, which makes du equal to 3 dx. Most of the time, our du's have been very, very simple. There's just been numbers which we can put in and compensate for. So now we have 1 third integral of u to the negative 1 half du. If we take that integral, we get 1 third u to the 1 half times 2 plus c. And make a final substitution in cleaning up. It becomes 2 thirds. You do square root of u, put it back in the same form, 3x minus 5 and plus c. Our final example on this is evaluate the integral 2x cubed over x to the fourth minus 1. Now, what would be that u du form here? Well, we see we have x to the fourth down here. And its derivative would be an x cubed. So the most likely suspect here is making u equal to the x to the fourth minus 1. We take that whole denominator. We do not take just one piece of it. So let's make u equal to x to the fourth minus 1 and du very nicely becomes 4x cubed dx. So if we begin to substitute in, the u is in the denominator. For our du, we have 4x cubed. Well, this is 2x cubed. So we have to multiply the numerator by 2, compensate with a 1 half out front. So now we have that 1 half sitting there. So now we have 4x cubed dx, which is our du. So we have du over u.  They can become very tricky if you do not look for some basics of what has to be substituted for u and du. The last thing I want to leave you with is, when you have your integral ready to take that integral or anti-derivative, it has to be totally in u and du forms. They cannot be any other variable in there. You're only compensating with numbers. This concludes our lesson for today.


it's me here.  We live, man, Yeah, I think so, Episode number 30 one of the muddy or quickly actual podcasts and we're here at the Great Oak. Yeah, we've named it. So deal with that. Why do we call it the Great Oak? Because it's trees and it sounds because you could shorn it to the oak. I originally wanted the brownery. No, it's not About me you guys are why don't we um, why don't we throw it out to the filet cluelure? We're trying to think of a name for the house What have you done a poo? Yes show me?  Oh We're trying to think of a name for our house this house Can you guys please leave your suggestions in the comments below?  There's a few good ones in there there was you said Sun Corp stadium Sun Corp was an option. What's fish? Oh, yeah What's and what's fish was an option for the name of this house. What's a fish? Yeah, what's a fish? See that sounds oh, let's worry. Where are we watching it? We're going to what's a fish isn't animal in the water, but like where are we going? What's a fish? I just told you what a fish was, but where are we gonna know you said you said um, let's call it 730 So they like what where are we meeting 730?  We're ditching that but yeah We're here. We'll know it'll appeal to everyone and we'll all nod and go. Oh, yeah Yeah, that's the way I guess it was funny whenever everyone was stone. Yeah Speaking of stone.  You didn't come brown. I was very tired.   Yeah, especially you he hates Marty Yeah, I think I approach it a bit too Yeah, my frequency is too high for adrenals not giving all the right sense.   A bird is okay. You can okay.  Don't be one like a Mongolian horse Do you have a family and you can 100 well? Talk horse and the other horse But did you see the horses they were just angry at each other. Yeah, but it's also much as much simpler life They don't have to worry about the world ending.  I'd rather be a bird over a horse.   Yes 100% aware. Sorry, but we you know There are many benefits to being humans, but there's some terrible terrible terrible things the Queens dead Who cares?  It's just Queen Queen Queen.    She did it. All right She had a good run.  They're making a public holiday now for her. Yeah, I found out today, Brown Yeah, it's the one remember how I said I've got Thursday off.  Remember every ten weeks. We have one week off and that's lovely. It's life-saving I cannot wait for that. That's that's that. Hey, when does that's a killer next week? Yeah, yeah, the after tomorrow after Friday.  Oh, that's good I get the day off on you exactly so to spend at least one day with you So Nick we're gonna film the next podcast on the Queen's death holiday day In her on should we reveal that or we'll lucky watch it Catch on to us. No, it's all right. We'll we'll think of some way No, wait, let's just say we're not filming it there for lucky. Yeah. Yeah, but lucky lucky if you're watching We're filming it on Wednesday morning. All right, that's when we're filming it. Yeah So, yeah, basically, I reckon it's time. What else has happened?   I remember I see I see I saw that Yeah, so he was getting patients in he's saying you need your teeth out and he was ripping them out Oh, like when you take a car into the mechanic and they say all these things are all broken So he must get off over pulling out. Oh, well, he just makes more money Yeah, he made yeah, he made millions because these people needed he's making these people get procedures that they didn't need Oh, that's very clever. That's actually smart. It's good business. That's great business. What else? What was the other thing?  Do we want to reveal this now? Do I have a chat about it first reveal it next week? We're gonna reveal it now and stay accountable We're not gonna I'm an hour anymore. What is happening? It's locked in.   Okay. Well, we need to answer So so Guinness World Record came back to us They said that the record that we were requesting doesn't meet their requirements as a world record. There was a similar record, which was a Was it was a live stream live stream which went over 60 hours, which was quite interesting But it doesn't fit our narrative.    I don't know yet depending on the venue Comment in the comments. I will come. I'm from Brisbane Oh, and we'll see how many people say yes, and and that will go from there But yeah episode 40 we're gonna aim to have a live Which is like nine weeks away, so that's a big deal. Yep. No, look look we've taken it on now And that's that brown if it's look worst-case scenario. We have it here at the house You said you want to call the yeah, well, it's the oak for now because we haven't changed it You have to call it something 730 Anyway guys, I don't know if you know this but we are actually running a comment competition. All right We're picking on the season finale We're gonna pick one comment at random from the entire season Season number four and that comment will win $1,000.  What board the comment board. Oh, yeah, the comment board.  Could be yours. Sorry. Doesn't even have to be a good comment. Sorry Yeah, just say sorry All right, we're gonna do the sponsors Now we've there's been a few requests with the sponsors that Michael has a go at doing the sponsors So Michael will be leading today's sponsor talks everybody And we have Nord Nord is back Nord VPN for for this episode. So Which one would you like to do a man scape or not? Why don't we do man scape first and then I can show I can show him what Nord wants to say okay So put it this way You can be a boy or a girl or both But you might smell bad.  You've got cologne There's ball wipes, but those ball wipes can be used as breast wipes So it's very equal. It's always equal rights with man scaped even though the name is says man It's not very equal there is it? Yeah, that's okay. Okay.  Yeah, it's pretty much free one in five dollars scratched off You use that you get free products from man scape from us. Well, not free technically. Yeah, okay?  And of course We um where our other sponsor for this episode is and the great Nord VPN Michael and um People Sell it Michael.   We hate doing them No, if you're listening nor this now nor if you're listening does now. No, but nor we love listen. We love you guys Do you have air dates for two times Okay, cut that Connor If you want something just a little bit extra on your computer what isn't what is it? Oh, yeah adds more layers of security like a blanket.  Yeah, even Nord's not often it did offer some protection though So Nord is a blanket for your computer basically or even a shield where it could protect you when you go Searching out in the wilderness of the internet. It's full security. You need it So it's like having like a bouncer with you at all times Maybe two it's two bounces. Well, you have my attention. Yeah, so the big man comes with you as you search the internet Protects you when we got two of those now grab your exclusive Nord VPN deal by going to www.forward slash Nord VPN.com fully forward slash fully actual To get up to a huge discount link will be in the description as well Otherwise, we don't for the Nord will be in the description if you can't remember one month or so four months for free And yeah, what four months for free so four months is that's a whole year free pretty much If they use our discount code, that's crazy man. Is there surely that's must be all there must be nothing else that they can do Oh, no, they do more. Look, it's free for four months. Did I mention that? What? No, you didn't mention which is a whole year four months a whole year Year nearly of Nord. Yeah And it's completely risk-free Nord's 30-day money and how's the risk? I don't know if you've ever heard this before money Guarantee guarantee if you know what that word means guarantee that means it's guarantee certain teas That means it's like a tea. It's definitely definitely gonna happen. It was actually Garin in the tea Yeah, so like it's tea made of Garin. They send out tea That's Garin flavored. Oh, is that one of my neighbors have you don't like it after 30 days They'll send you tea that's Garin flavored guarantees and and it's Matt had a good question He said, oh, how's it risk-free?  I give you tea as well as your money back I think the tea's more of a metaphor of the money. Oh, so it's not tea Well, you can use the same thing. It's like the four months twelve month year.  No, look if you use our discount code I heard about this. Do you know what the gift is? They send you a gift. No, it's a mystery gift Yeah, it could be worth up to ten grand. I don't know. I'm just I'm just making stuff up now But if it's a gift, you don't know it's a second-hand that's the beauty of a gift Yeah, I know whatever they're giving you someone could pay ten grand for it. So really So shop are there and that's how that is there And of course the University of Michael a subscription website where we post weekly videos that are far too fucked for social media And this website funds our entire lives All right, we put our best work into the website because social media is no longer No longer happy to have us because where to foul tiktok is banned as for life Yeah, we have a we have a permanent live stream ban on tiktok because we showed our butt Once so now that's When did that happen? But now all our avenues in social media are slowly slowly dying. So that's why we have the website It's just we're gonna make different content for social came. It's so it's the content that we don't like making as much Yeah, well, I mean like they take things away from us in social media in our website We would never be banned from going live. It's our website. They can't do that. Is that what it is?  We will do yeah We do in our Facebook group anyway It's also risk-free because it's a 21-day free trial Sign up in the links in the description And if you don't like it you can leave free of charge, but I guarantee you watch 10 of those videos you'll be a changed man You what's the one that's just flala clala?    It's sort of magic. We're not gonna explain it to you Matt because you should watch it You should watch it and or Also this week we filmed our house tour of the oak, which will yeah, like probably yeah, and like what four weeks? Well, um, yeah, there was some real estate agent gentlemen that were here. Yeah, did the house tour So yeah, we didn't let you know but real estate was through here some agents. They went through your room.  Yeah, okay, you're right That's taking a like into that words What was the one that you were doing the other day?  Well, you gotta practice it. Yeah, you guys have accents like why just lose the accent just say it how I'm saying it We didn't grow up in Yeah, why does that matter? You know what that you know what I mean? Why does that matter? You should just Yeah, I did it. That was fully German. Can you do it again? Let's want to try Weiner hunt Shweiner who's saying shweiner who shweiner hunt Anyway, on this show by no hunt.  Sorry. Sorry on this day On this day in a world far far away for children did play The children laughed saying played and ran but when I tried to join in they said no, you're a man Depression poured out into my heart. I needed to cheer myself up. So I let out a little fart The children all chuckled and giggled a bit.  We all watched it steam.   Wow, Matt. I didn't know you could do that. You wrote a song Basically, so you wanted to like you would want to play with some kids But they wouldn't like mean to you and didn't want to include you in their games is out Some childhood That was that's a beautiful. They thought he was a man, but he was a Where does that come from? I'm sorry everyone. I've got Marty's diary on the other phone and I can't see it because I can't we're filming with it So it's ruined. It's ruined. I've ruined Marty's diary and that's my mistake everybody. I need water Michael yeah, yeah, here you go Michael it's it's turned for your bio. It's turned for your Bible Michael's Bible is a book that he has written He spilled all his wisdom down on some pages one day and he's got a Bible and while he's reading it He's not Michael. He's not Jesus.    I got in there somehow though back to the future at a classic Fimy dodge ball good film dodger ranch cunt Sorry But yes, you picked it. Oh, actually, I mean to say no dude, I didn't know they were part of your collection Well, you didn't even like Matt has a list of he has like a billion dvd One tower with some DVDs most of them are very nice. There are some it's very awesome That are mine.   I watched the other night Transformers not mine. I absolutely swear a mother that transformers is not my three musketeers like hang on three musketeers is great It's got Keitha Sutherland and Charlie Sheen in the peaks of their careers.  Yeah, like you shouldn't and Back to the future overrated. I'm saying it anyway. I think some of them are but the first one's classic.  Sorry. That's um, we're gonna talk later. I did have sorry at the end of it Sorry, I did sorry. I didn't listen. I was just enraged anyway. Oh, wow, okay So it's time for you miss so many other films that are in there that could have been mentioned Yeah, but I just love talking about no, I didn't know that that was your list. Sorry, dude I thought that was as this movies.    That's where we're at Okay, does that make sense everyone now? Where is your diary wherever you put it? I see it and There was the Pinocchio accident Did you watch Pinocchio the new one Yeah, there's a new Pinocchio movie out and it's like not the same watching it because we know what actually happened to him because It's in the black book. I haven't watched it yet Anyway, and a baby whale got fucked. Okay, so that's where we're at. Okay Here we go. You should try whale sometime.  We detangled our bodies and Julian took my hands in his This isn't goodbye Maddie It's I'll see you later There won't be a day that goes by that. I don't think about you my sweet Julian as As promised, I'm gonna send you back to earth now That means you will be revived at the exact place you died at the exact same time. I died as well No, one day in hell is like five minutes on earth So since you got to her lock four days ago about 20 or 30 minutes have passed on earth So on earth right now. It's only 20 minutes since I've died. Yeah, that's exactly right come now get ready Here we go. I grouped Julian's hands and felt his power coursing through my body. I'm scared Julian all this hurt I would never let anything hurt you Maddie Just relax. I immediately feel relaxed and we share one final kiss as I feel myself Projecting upwards. I love you Maddie. I love you Julian I burst through the ceiling and it feels as if I'm falling up Everything is a blur and I'm traveling at light speed I shoot through different dimensions and all the colors of the universe swirl around me then with an almighty thud My spirit explodes back into my deceased human body on earth. I'm back to life I take my first breath there and open my eyes. I'm still lying on the floor in a pool of blood I felt my head with a baseball bat wounds previously were and they all completely healed I was alive and fully healthy. I heard footsteps approach behind me and decided to play dead I wanted the element of surprise to help me defeat choir. I felt choir grab my ankles as I continued to play dead She started dragging my limb body towards the garage giggling My heart began beating harder.  How is this possible?    She screams at her knees snap backwards She falls to the floor in a crumpled heap Matthew, son, son, please don't whack.    It felt nice to kiss a female again It had been a while.    I stand up and walk over to questin What do you think about that mate? He says nothing and stares off vacantly Look, I'm gonna leave you for now. I want you to be recover so that this is a fair fight But I will be back and I will have you so that there is no question that I Matt Brown and my family's number one Hover I look back at choir.  It wasn't gonna be the proper way if he wasn't a hundred percent Very noble of you, man.  That's when you climaxed. Oh my god. Quiet must Quiet Well, yeah, what's the first time he's ever had his mum unbelievable Thank you gobbies.   There's not much time. He's strong and fast It's Matt Brown bachelor brown. Oh, and which is a segment where Michael and I have taken it upon ourselves to find Matt A partner a mate someone he can share life with because quite frankly Matt sucks at finding girls He's single and alone and scared in this cold massive house And he has no one to share life's many treasures with and he's sick of it But he needs our help so Michael and I've gone out fishing Fishing for Matt Brown future wife, and we found ourselves a little fish We've got five fish at the moment Yeah, Matt's favorite fish on the board the top five. Oh, yeah, how'd you did you talk to that other girl from last week? She yeah, nothing communicated. Did you add her? I tried but Nothing, so it's no it was no snapchat action. No, nothing. Why does that keep happening? It's very frustrating. Maybe maybe she died Maybe okay, so last week's was I spelled it was a failure Okay, so last week's she seemed came though.  I did it that night. Yeah, send like 10 messages. Yeah Well, look, I'll just give I'll just give her your number. No. Yeah, I think I'm gonna have to I don't want that at all Anyway, so the new bachelorette for this for the tonight's date is her name is Ali Okay, and her twitch name Here is extra Na Cly extra not clay Extra not clay sounds like something which I which is gaming which Matt loves. She's a twitcher. Wait, so so That sounds like something we would say extra not clay. I know it's beautiful ask her anyway. Look at her twitch You got to hear a voice. This is a conversation with her first my brand and see if there's a nation God man, you're jumping ahead of yourself. We go straight to looks and that's why I don't know that's why we've come in You need our help. Anyway, that's your LeBron. Yeah, we're brown time for your date.  You know the drill.  Well now. She said she's a twitch person Well well well do I have here Ali Ali finally getting a chance to talk to mr. Matt Brown Ali this is your chance. You're on the muddy Michael fully actual podcast Which is I think the biggest podcast in the world and sitting right next to me He's so nervous. He's been he's been clapping his hands together like that really fast and making excited sounds like Like that because he is so excited to talk to you and he cannot wait to show you What he's all about he's got nits.  Hello, Ali Hi Matt. Oh That's pretty good. That's a flotation Tell me about yourself My name's Ali I'm 29 and I currently work as a robotics engineer How about how about you tell me about yourself? Yours is gonna sound way shitter compared to that, but yeah, mine's horrible Who's about me is terrible That gets dressed and that's 40 he gets dressed up with his mates I'm 35.   Is that right? What are you doing twitch? Oh Yeah, that's what I like to do at my spare time. I like to play games on mine like talk with people You know, I'd like to talk with Matt Brown, but he wants to talk to me that Where are you from?  What do you like to do?  What is it? It's Extra neclery Yeah, extra knackley, but oh extra with a capital and and they see to make it like Macl is fault. Oh She's using her brain. All right. Oh, sorry. It seems to rubbed out. Just needed pretty good at giving brain Go Matt say something flirt with her a bit say something Tell her tell her that you have huge biceps Tends for her tense for her, but don't Ali what made you come on here. Do you watch the podcast? So you've been watching Matt for a while Ali Yeah, and I've been seeing you talk to other girls and I'm not really happy about that Yeah, Ali. Have you seen what have you see what happens? Sometimes we get bachelor? Bachelorette's on and then they they're like, oh lovely to talk to you Matt And then they they don't follow up and communicate after the podcast is over are you Do we have your word that you will at least speak to Matt Brown after this podcast and see if there's a spark there? Yeah, of course Yes, and how would you like to communicate with him via Instagram? I can I can give out his phone number to you. I Already have it in the ground. Oh, so you already follow him or I will maybe just message him on Instagram Have we spoken on Instagram before? No, okay. Not yet. What games you play on Twitch? I like to play FPS games. What's the first-person shooter like shooter game? Yeah, first-person shooter Battlefield loves that Matt loves fortnight, and he's very good at it.   Probably like a like a Sunday walk, but like kind of around like Brunch time and then the walk like ends that kind of midday, and then we can have some like craft beers I'm really into craft beers So weird that you said that Ali because Matt loves his Sunday walks, you know Matt Brown He always goes on Sunday walks every single Sunday here. There he is rain hail or shine Sometimes he's running backwards She lives in new farm you go on Sunday market new farm new market But you pick her up from new market and go to a new farm. Do we have a plant deal this Sunday? We got a new Ali Do you have plans this Sunday? Okay, well, we'll let you guys handle it I reckon if you could say you're in love Matt if you go to dinner anywhere in Brisbane with Matt Brown Where would you go with him? Oh? I don't I'm not a big restaurant connoisseur. I don't really know Neither is Well, or you guys can just chill here and Michael and I will happily get some door-dash food for you guys We're actually going to start out to switch up again one day to Ali What are you going to play on yours? Probably worms armageddon. Oh, I'll probably play fortnight And Matt loves his fortnight. He's very very good. Yeah, Matt. What's your favorite material for tonight? My favorite material Yeah, what building material? Oh He's yeah, that's quite rude by Matt. I'm just pointing it out For someone you're falling in love with you shouldn't say that. Oh gotta be wood Oh Being flow pretty hard Yeah It would be concrete, but there's not really concrete. It's more rock and it's not wholesome concrete. That's why it's exactly It's Hanson.  I won't lie. Um Ali. I actually Thought you might be somebody I know you love her. You love it.  Do you know Ali? Do you know I used to live in winsor? Oh Oh, really? Matt's getting deep now for two years. I was getting personal and how did you feel? I don't ask you whereabouts. I don't want to put that on the podcast. I don't want to I lived at 50 Yeah, you can sign down. I don't live here anymore. Yeah, tell everyone Yeah, no, that's okay Um, all right Ali. Well, thank you very much for your time. What's your instagram? Do you mind us saying it on the podcast? It's the same at all. It's kind of embarrassing. I gotta delete the old pictures, but you don't have to read We can bleep it if you want your instagram. I mean, no, it's okay. It's the same as it's my twitch Okay, it's the extra Extra knackley. All right. All right. So matt expected dm from extra knackley and you will reply tonight. Yes matt I will follow you if you already follow me.  All right, so it seems like the date went quite well So do that. Do that.  You consent with So you consent to in three seconds time a peck on the lips.  Yeah Don't okay. I won't lie. Let her put me on top. Yeah, I won't lie. Ali. You do have all right. Let's get the board Hang on. Hang on. I didn't say would you 100% she's on the top five.  Show me the five who we rubbing out greg or now greg's too sweet Ethan what about Ethan?  Yeah about jess. No, jess is very good Jasmine It's gonna have to be Ethan. Fuck. I'm so sorry. Ethan.  We love you. How's he getting his gift? I don't know. I guess they'll find out his address and we'll send it to him Is it ellie? He lives in brizzy. I'll just go drop it to him. Yeah, all that. Anyway, ali Thank you so much for your time. Ali. Ali. How do how do we spell your name? Is it a or is it e?  I can see him licking his lips like a chessy kitten I'm gonna be very sad if I'm not on top. I'm just saying that Well, I might take like an hour to reply to you if I'm not on top Well, you're at top five now and Matt's very rare that Matt kicks someone off. So this is especially this is big This is big news ali. We're excited to see how it goes. Thank you for your time. We'll chat to you soon See you say bye Bye It's good, dude, where did you find the one we found the one find her I have my ways I am a willy wonka Maybe I'm on I'm distressed. No. No. Yeah. No. He's he doesn't think it's a real personal No, I think it's a real person, but I think it's somebody I know a promise I promise.    It's prime podcast type So i've got jackson lined up jackson's just come out of surgery And like he's he's it's very hard for him to do things on his own so he needs someone there So it's perfect. We're just going to slip in a nice easy lie jackson's just going to say oh My stitches have come undone. You need to take me to the hospital in the morning or something And there's some soon as like he goes. Yeah, okay, that's sweet. Then we jump in and flilly clay the layer We should have gone more dark like my my other backs, bro No, I feel like he's on if it's slightly shocking. Yeah, sure.  Oh, yeah, I keep forgetting that you're sitting on a milking stool Which is one leg I feel like I've got to hold myself up a lot and that's making me my body work And I feel like I'm sweating because of that But like don't you think it's like good for exercise sort of yeah, it's good But it's also it's hard for matt to sit now. It's yeah, it's but it's not good to for sitting up straight I've got a sitting down is now a workout. Yeah And that's great from us. That's great work everyone. I'll keep it though Okay, I'll put it out in the living room. Throw it through one of the windows Oh Wait, if we're doing questions, we got to have a bong break That is so fair. We just did uh comment on the week. So let's go have a bong break. Hopefully jackson doesn't call during our bong break Oh, they call it blast week. Here he is Look at it. Oh my god. What the what are the chances can't we're about to have f**k mom. All right. Here we go Jackson Oh, there you are. You scared us my flung No, I've got I've got a setting on my phone a blocked private number so they can't call me. I didn't think you Oh, that's so smart. Hey, do I have to call you for this to work or can you still merge a call even though you were the one who called me? Are you on the podcast right now? Yeah, yeah, you're on the podcast right right now, by the way It's good to hear your voice. Jackson. Why don't you Well, Jackson's just had like there's two discs removed everyone by the way Did you know what story steel rods in in their plates titanium Stools Yeah, yeah, yeah, let's do this and I reckon just say What and um, I reckon just say to him Oh, can you can you drive me to the doctors tomorrow? They need to have a look at my stitches or something real simple Yeah, no worries. I'll give them a call now. Let me try and merge it. Yes, please dude. Yes, please You're the best, Jackson.  Sorry F**k F**k, he's on answer. I wonder what he's doing right now Well, I do we'll chat to you soon. Sorry. Sorry. Sorry. Sorry. Sorry. Sorry about that Sorry, I'm sorry too. Sorry. I'm sorry. I'll put my hand up. It was me. I'll stand up. Yes, sir. Sorry, but sorry F**k I'm so sorry. Sorry, man. I apologize Sorry, sorry I'm sorry. No, I'm so sorry. Sorry about that dude.  Why? I'm sorry So out of character. So out of character from me. I'm so sorry. This isn't us I'm so sorry. Anyway, I think I'm having anxiety attacks Yeah, sorry. See it. That was a really good one Anyway Anyway, it's time for a We'll be right back with Q&A and the lying-to-loggy sing Pom-pom-pint Pom-pom-pint, man Oh, he's calling You ready? He's calling Matt, he's calling. He's calling. Hang on He's not. We're back. Lie-to.  All right onto the f**king questions dog s**t. Let's f**k Oh, that is good. That's a new thing. We should start up What? Where you just do the first two letters of the word So instead of the it's like It's It's too hard. Yeah, sorry. It's too hard. No, sorry about that We're still gonna do the screaming segment. I realized I think there is something there Sorry about that something we can work on Remember someone dm'd us and said He called his number. Is it like a massage place? We should call them and scream Well that relates to the top question. We should do another screaming segment. Yeah, we will after this segment another screaming Okay, here we go question time. F**k. I'm social ally top question went to zack jenet jenet depending where he's from um Question of the podcast will you ever bring back fan prank calls? They're some of my favorites from season two Maybe just a few here and there if they're good. We talked about that. We're trying one today. Yeah, we're gonna try one but The reason fan Prank calls are hard is because I have to call off a private number because obviously I don't want use people having my number and People don't answer calls from private numbers. So we're left f**king like calling No one picks up calling no one picks up and then we go through like 10 different fan prank calls And we've just been calling people and no one picks up. So that's why we move to only calling businesses Because they're always open and they will f**king answer the phone But yes, this week we will try a fan experiment But uh fan prank call, but don't get your f**king hopes.  Sorry Sorry Next question is from a Fondue I'm so sorry. I've really f**ked that name up Um, when was the last time Michael had short hair and can he show a photo? Oh, it's on like instagram. I'd say it wasn't the last time he had long hair though I reckon I had short hair back in like your early 20s like numb 22 So what's that like 15 years ago now? No.  I had short hair when I met you It was like this If you've never ever grown your hair out try it once Oh, unless you can't your hair looks just like mine grow long because that's what happened to me Right, I would love it if you just grew your hair out for like honestly, I would look so f**ked I took a photo of a Marty. He's so f**ked. I would love it I took a photo of Marty In from your mother's apartment. There was a photo of Marty young Marty and your hair was long, but it was like short Yeah, and it doesn't grow past there. It looks straight doesn't grow Could we how much would it cost a month to let you just keep growing your hair? I see mines Yeah, but how much would you how much how much everyone's got a price? Oh, it's pretty embarrassing then again if bachelor brown just wear hats and s**t How long I'd have to do it for as long as you want you keep getting paid each month. I get a paycheck. Yeah $5,000. Oh, you like that is so f**ked. Oh, you'd smoke meth five times over before growing I reckon a hundred bucks a month I'll drop it down to four thousand. I'd go a grand Oh, dude, I'd go a grand a month to see him grow his hair Oh by next year like it'd be real rough Yeah, could we a grand a month you get extra it's you want to get laid though and that Beautiful we're hats and s**t man I'd love for you to be at the podcast with this I'll look like question I'll look exactly like question the other other you have to be on the podcast with no hats or wigs on We'll give you a grand a month if you do that. Oh, can I think about it for a week? Yeah We'll make sure Yeah, remind me discuss this next week bring that make sure you bring that back up Please take this opportunity to like comment and subscribe to this channel if you haven't subscribed a third of you haven't subscribed Please subscribe. I see you analytics Just press press the red button. Yes And a five star review on Spotify. Please. Please. Sorry man. Go on next question is from Steven haunt Does Matt Brown have a hinge account? If so, what does these matches think of him? And what is your opening line? I don't have a hinge account The most I've gone is tinder because I just hate online dating. Oh come on. It's fun. It has its uses. Can't I haven't I haven't there's hinge. There's so many you haven't been single since f***** for f***** ages So I downloaded hinge because it was Advised that I do and it was just so much you the sun is too much What do you mean? There's got to have an opening line. You have to have to buy you have to leave a voice message It's just too much. What do we say before like Cement line that would be perfect for some f***** hard controlling. Yeah, I'm happy to do that Your opening line is just screaming Oh my god, I've just thought of a f*****g segment Next season or this season will do like chats with brown And like we'll literally have like all the conversations that you've had with girls We'll have to work it out and I'll do some as well And Marty's will help. Oh, man. Yeah. Yeah, that's that's got potential for next season. Matt Brown and online dating apps Yeah, Matt Brown is Brown dates. It depends. Oh It depends. I'll just call it brown dates. I'll have to check in with either You know The cops Dates like the fruit Yeah, I could be dating Ali so I could be I could be in love with Ali and You're excited about Ali. That's for sure. And who knows or either or um or Jess from the UK Greg, I don't have a look at I But no Now Don't don't go on with your questions. No, because then people are just gonna watch you so Anyway, sorry the the dating app thing. Yeah, not I don't know. I don't enjoy it. I'm really bad at replying Um, yeah, it's not a fun day So Sorry I found a Matt you're gonna be so happy. Can you just not? That is so up your alley show him a picture. I mean, it's not my alley Show Matt a picture The girl with Matt just had a phone date with what's her name Ali? Ali. No, there she go We do this later No, we've found you this is the one you can look from a distance.  Oh, yeah, look he's touching the screen Drink that in Matt Slurp make the slurp sound drool drool over your bottom lips um next question is from decoder um Decoder always comes up with good questions and always comments. Thank you decoder so Can we can oh, sorry, can we confirm that all the bachelor browns are still alive and will matt Has not had any of them out of pure rage. Oh, yeah, that's actually a good point. Maybe that's why the segment's not going so well Have you been Murdering and hunting these women. I don't think so unless I black out All right, so I don't think so But yeah, it's great. Yeah, the brown is back to like he's something to keep in mind He's on the brown and narrow. Well, you know He's a reformed brown, but the brown and narrow. He has that evil within him. It could erupt at any moment Next question is from doughnut films like a brown volcano like a brown volcano spewing brown lava Um, do you guys watch scary movies? Yeah, I love scary horror movies. Donut films want to know What's your favorite scary movie horror movie the latest one the one that I've watched? It's the creepiest in a long time really Midsummer it's not that scary though. It's just a real creepy. Yeah, I like that.  They just jump see you can say jump scares are scary, but they're not No, I like like true The best ones are like true story based on true events like the amen evil horror or what's that one?   Yeah, you're getting close. Uh, don't scream at night the simsons movie. Um Jane and ed warren. Yeah. Yeah I know what it is. I'm looking to say it's the amen of your horror. It's not it But they are involved with that They are involved with that Conjuring. Yeah. Yeah. Yeah. Conjuring the conjuring series is good. Yeah Next question is from Ben Hickenlopper Oh, it can be parked. It's also a german word means love Um, I don't know if you don't if you guys even know what are your golf handicaps if golf any good in australia I'm not I'm not on that level yet. I'm talking about definitely not on that level. Yeah, I'm I can be unpredictable I'm not that good, but what even is a handicap? I never got that Yeah, can you explain that if you get even par out of all the holes What do you mean that if you change is all the time? I don't know what that is So like I think even par is like and man, I also get this wrong, but it's like say All your par's add up to like 70 on a golf.  Yeah And then I reckon I would be if I was to play 18 holes at a normal golf course are going to be like Nine over that's so your handicap is about nine. I'm going to say that I'm probably like double that I reckon I'd be yeah, I'd probably be like a 20. Just count the hole. I reckon I'd be 10. I'll say I'm 10. Okay I'll be 20. You reckon we just I think there's a process to deciding. No, no, no. This is it now.  No baby 28 30. Okay. I'll agree with that That's the handicap is 30. No I reckon Yeah, well, yeah Does that mean that gets to start six to see 30 shots ahead next time? But that's like if we do use the like I guess yeah, we do Next question is from say yama shoku I know that one. I don't think I did no Um, why does michael always keep yelling? Oh my god.  Peer some little fan of jesus a huge fan of bezis Yeah, I don't know. It's like you always do. Yeah, I'm afraid of a curse word that you use It's probably there's better things to change it up though. You say something's wrong. Something grandma would be Yeah, not very happy using the Lord's name in vain there. Yes. So yeah, I think about something else maybe So yeah, I might change it to Gosh dana, you don't really think though in that moment when you're there's blinding pain Crossing through your body. You just there's no decision-making. You don't think oh I'm gonna say this now.  It just makes a loud sound Oh, yeah, that was good.   Yeah, I'm still thinking about bashing julian just just for the The two minutes of pain he caused me.  No, you have to be like 10 grand. Yeah, what about dude? Can we do it for 4k you can't no you're not gonna sew this to my head We'll pay for the procedure. I'm I'm dude. I'm 10 grand for one month. I'd do that All right, if you both get tits on your back No, come on. Well if you it's just hair sacrifices It would work like you flale clale. Yeah, it would work She came in on a monday morning Oh, I imagine what they'd say when I walked through the door. Oh, by the way, people how was everyone's weekend? By the way, people listening on Spotify man. He's wearing a Blonde like think of like a, you know super saiyan. Yeah from Dragon Ball Z Like that's what his hair looks like.  It's like a yellow in my hair I'm pretty point break. Let's just say cool. Oh, wow Next question is from bow williams. He did ask about shami and jaden and doing videos with him. Yes The boys will probably do another video with them in the future Um But he also asks michael, what do you think of the movie interstellar? Oh, it's fucking. I love that movie. Good film.    So you can't back anything. I can back everything. So Yeah, yeah interstellar is way better than star wars. I will say that it's real It's real life, bro. That actually happened. They filmed it back then Like millions and millions of years ago.  Yeah, you need voice um Would you try recording ads for companies that don't sponsor you and then build them to see if they would react Yeah, this gave me a segment idea. Imagine if I we just started doing that like We do like I'll read out like oh, yeah, we do. Oh go to Kmart Kmart awesome. Yeah, and then I'll send an invoice to them And I'll be like, hey, we promoted you and then they'll be like, oh like we didn't want that Sorry, and they were like, oh what you're not going to pay me now for the work I've done and then just have an interaction with them. Oh But I don't know if that's illegal though because imagine if they just paid if one of them just paid Yeah, we could get in trouble. Is that like us trying to scam people out of money? That's like fraud or something, but it would be funny to do it with some just give him a fake bank account that doesn't lead to anything Or we can just oh, yeah, that's true. And so it just bounces back or build them for zero dollars But then we don't know. Yeah, it's all flele. Clele. Sorry A question from the podcast from David Clark Would you guys consider doing the orange toss again? But this time make it more interesting trying by trying Marty and Mockle together or tying Marty and Mockle together so they can't run The orange what the orange toss is that where we have oranges thrown at our bodies? Yes Yeah, yep, we'll do that again. It would Man oranges are no joke. Okay.  Sorry Oh, yeah, yeah when my eye flew Tundalua remember that to get that little machine that poked my eye Oh When I got years ago, I got hit in the eye with an apple film and a video like direct hit from James The hardest throwing friend of ours that we have we've all got pretty good arms on us And it was a direct hit on my eye And I went to the hospital because I couldn't it was excruciating to look left and right and up and down I'd look straight ahead Then they got this little machine that they to test the pressure of my eye They wanted to see if I was like bleeding in behind my eye They just it just touches your eyeball really fast And you just have to keep your eye open this little fucking machine. He's just tapping on your eyeball. Oh my god I don't remember. Yeah, it sounds horrible, but it's it's really fast and you barely feel it though. I will say that Oh man Anyway, if you get hit with an apple it has a chance of disintegrating and orange is like Remember my face was numb in parts for months.  That apple hit gave you a stroke. What do you suggest is your best hangover cure?  Yeah.  No, there's there's time if there's there's potential if you don't have too much But if I skull water that's guaranteed.    He'd be like We'd have to go get him food because you couldn't even stand up I'd have to munch on apples just to get like natural sugars in me Like a little injured possum on the side of the road Next question is from Calvin Klein camera archive Boys, what is the story behind the feet tattoos and how did it come like how did it come to be? And ken brown get one.  Um, uh, our shoes Our tattoos of shoes the same as shoes or as or our tattoos of shoes just tattoos So you're checking if tattoos shoes and stuff like that So we check to see if Tatling shoes on was the same as wearing actual shoes that was our experiment and the results were amazing Yeah, we we shouldn't give it away, but it's surprising. It's not what you think Thank you. Sorry, but go watch it final question is from ash And her question is We know you're all we know you guys are interested in sleep paralysis science Aliens and is there anything we wouldn't Do you want me to Is there anything we wouldn't suspect that you're interested in so is there anything that you guys are interested in that the people Just wouldn't expect. Oh man tennis still tennis is ddr at the r.k. Dance dance revolution really? Damn, I wish that was true No, it's because I've seen you play it a few times back when I was like 13 Me and my mate we guys are really into unique health things like marty's into cold showers and sometimes cold bars Oh, man, I can't deal with cold. Yeah, but marty's into that sort of stuff Yeah, but you never used to be no, it was only since wim hoff helped me meditate for the first time in my life James is into some weird health stuffs as well. He got the shakata mat. I don't know. Yeah We're just into natural health stuff. Yeah, I wouldn't say it's weird.  We're into I love boxing. We watch you have see Tennis and cricket.  Can't Don't know what it is. I love cricket more the older I get too I love watching it cricket, but I can get that with golf now I love watching the ko minis of all of the cricket games every single one Even when Australia's not even involved.  Yeah, I'm really into the UFC Man skateboarding go buy an evolve board. Oh, yeah, we like yeah, we like the electric boards. That's always a fun day out There's I'm getting a faster one soon.  Sorry about that.  No, I'll be safe.  This is a segment right where we just call a random business And I scream at the top of my lungs as loudly as I can If they make it to 60 seconds without hanging up I have to say to them you win this round and then Go from there. So they win if they make it to 60 seconds. They hang up. They lose Oh Last week or someone said remember 55 seconds. I mean, it's a long time to listen to someone scream What are you doing brown?  What's your prediction?  I reckon we do a round two. Oh brown.  I love it.  Well, that's you live in luxury That's the only have this for a bit.  All right We now need to move on to the prank call Sorry, we're gonna do the prank call and this week we have a fan prank call. All right, let me just quickly read this Hey legends, is there any chance you could call one of my friends?   Here we go. Like to lucky. Here we go Jackson Are you there? Yeah, yeah, we're there. We're ready. He's called you hasn't he? No, he didn't even try to call back. He just texted me and said everything all good. Just finished training Okay. All right, so it's oh, he's ready. No, he's got his phone on him. Okay. Fuck. All right. Here we go boys This is it Calling up. What did you want me to say again? Um, just say, oh, can you drop me to the doctor? Um at like 9 a.m. Tomorrow Are you sorry? You're the best Jackson Can't quite work out lads Oh, for fuck's sake Oh True True true true. All right.   It's something like Extremely serious, which is never could you could you put us like um, we'll plan this first Could you right now put us on loudspeaker and just say a lie to locky and then we can say that we got That way it's lie to you All right, I just need to do a quick live Jeremy 21 seconds Locky, yeah I need to go to the doctors tomorrow at nine in south, well They need to go to physio at 10 and I was wondering if you'd be able to come down and get me Can you buy a baby seat from kmart before you come so I can skin the back seat of the car?  This is a lie so easy Look, we're gonna we're gonna you're gonna miss us now. We're gone. Locky. We're gonna find someone else to light it I think I think it makes sense for something to fail. I mean, I was it's gonna look cute Like no one would believe it. Yeah, it's very true.  You start doing to my mom. I'll click you a number. Oh, yeah. Yeah, actually Start ruining your life.  Well, thanks for trying dude. We hope your recovery goes well We'll come see you next week.  You're the best jackson Anyway Are they good? Could I have one? There's a couple left.  Um All right, so right after this snack, we're gonna prank all This cunt all our pranks have failed really today Well, what was the overall time for the screen? Uh, like four seconds fastest screaming so many up.  If I'm busy. I'm hanging up immediately I'll hang up straight away Some guy rang the video shot once and he's like, yeah, can I order a pizza?  Um Delivery is meant to rove on Monday. Um, I'll call the bloke. He said, no, it's tomorrow. Uh, Tuesday Comes and goes and now we're sitting on Thursday, right?  He might watch the friggin flele Anyway, so we will try the odd fan call, but you can see why we stick to the businesses because it's uh A little less guesswork Hey, um, my name's dakota. Um, I was just looking um on your guys's um website And I've just noticed that um a fair few of the materials you guys are using are um, actually quite Destructive on the um environment. I was just wondering if you had a second to quickly chat about um Some potential impacts of some of the materials that you guys are using or Um, do you want to call to a manager or that would actually be great if we could um If I could speak to the person in charge straight away, that would be the best. Yeah. Yeah Awesome. Thank you. Yeah From choosing a paint color. Oh god, put me on hold like hurry up about it. Do you know what I mean? It's crazy. Hi Hello, um, hello, um, am I speaking with the owner of bunnings? Uh, no, I'm not the owner, but I'm one of the managers. How can I help right? Okay? Um, yeah, so I've just been looking on um your websites Um, and I've just sort of noticed um some of the materials you guys are using are actually, um, quite damaging to the Environment and I'm actually part of an activist group. That's just going out and spreading awareness Um to some of the places that are sort of misusing materials So I was just doing kind of like a courtesy call It's like a favor to you guys just to let you guys know that um, what you're actually doing Like some of your materials like are actually using the environment Like you're using the environment in your materials and it's actually pretty devastating to like the land Yeah, like I can appreciate that but I'm yeah, it's like part of like our business where we run like they do Um, try to sustainably resource as much as we can and there is like protocols in place Um, yeah in line with that and like responsible resourcing.  So it doesn't just grow on trees So it's for you guys to be doing that. I don't know. It's um Yeah, it's a poor business model. Um, moving forwards because we all want to live on earth for long times So, yeah, I can respect that. Now you only thank you for um taking the time to give us that feedback and We can make sure you actually write that down because um, yeah like write that down and I'll I'll leave my number In case you guys want to call back Um, and just I've actually got it on this phone. So I'm actually I'm actually a fear. Did you just call me a mate? Sorry. Yeah, my name's Dakota. I'm actually a female Okay, you go to that's fine. Anyway, I'll I'll leave you to it. You have a good night This is don't you can't just assume my agenda also like that. So make sure you write that down too I'm not happy with this service.    She's she's decoded. It's hard to hear out She's fair She's fair. Oh my god. That was good What's his name? Kleinford Dude, Kleinford did I think he did very well to put up with her. Shit.   It's all just been word of mouth this community we've built So let's keep it growing and tell us if you want to um You're in brisbon and if you want to come to a live show Yes, if we know when we have our live show we need an idea of numbers So please comment. I would go to your live show in brisbon below If you would come Okay, you have to actually come though. You can't just say, oh, that's it was cool. We're gauging the numbers like that's how we Yeah, help us please nine weeks. We're gauging the numbers.  Suck a fun blunt done brah Yeah, we're the best we're the best best best best best best best