Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Grade 11 phyics problem 4

  1. Dec 10, 2006 #1
    1. The problem statement, all variables and given/known data

    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
    D=m/V
    W=Fd


    3. The attempt at a solution

    F=2n25x10^3N
    d=7.50m
    D=2.00x10^3 kg/m^3
    V=1.15m^3
    W=?

    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
    weight=mass*g

    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
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook