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Grade 11 phyics problem 4

  1. Dec 10, 2006 #1

    A crane lifts a 2.25x10^3 bucket containing 1.15m^3 of soil (density = 2.00x10^3kg/m^3) to a height of 7.50 m. Calculate the work the crane performs.

    2. Relevant equations

    3. The attempt at a solution

    D=2.00x10^3 kg/m^3

    alright so i've calculated the mass the object will have and i got 2.3 x 10^3kg
    Now i was just wondering if anyone could help me on where to go from here?
  2. jcsd
  3. Dec 10, 2006 #2
    find the weight of the soil, add it on to the weight of the bucket and use your W=Fd equation.
  4. Dec 10, 2006 #3
    how do i find the weight of the soil and the weight of the bucket?
  5. Dec 10, 2006 #4

    g=acceleration due to gravity=9.81

    you already know the weight of the bucket is 2.25*103 N.
  6. Dec 10, 2006 #5
    Is it N or kg? You didnt specify and its very important
  7. Dec 10, 2006 #6
    is what in N or kg? everything is there

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