Take the tour ×  The question asks me to find the angular
velocity.   Now I do not want you to solve my homework, I want
explanation please.  It states that the acceleration of point P
is $\vec{a}= -3.02 \vec{i} -1.624 \vec{j}$ when $\theta=60$ It
also states that the diameter of the flywheel is 600mm.  My
question is :  I know that the acceleration is split into 2
components, tangential and normal.  I know that $a_n=r \alpha$
and $a_t=-r(\omega)^2$.    • Is everything I mentioned until now
correct ?   • How can I know which value does an and at take
from a given above ?   • How do I decide the i and j terms
respectively ?  Again, please do not answer the question and
find the angular velocity, but please explain the correct
approach and whether my deductions are correct.  share|improve
this question add comment  2 Answers  up vote 1 down vote
accepted  You have the acceleration vector already specified.
You have to separate it into tangentual and radial components,
and only after you obtain $a_\textrm{t}$ an