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Energy and Momentum Problem HELP

  1. Dec 2, 2009 #1
    Energy and Momentum Problem...HELP!!

    1. The problem statement, all variables and given/known data

    Brutus, a champion weightlifter, raises 260 kg of weights a distance of 2.50 m.
    (b) How much work is done by Brutus holding the weights above his head in Joules?
    (c) How much work is done by Brutus lowering them back to the ground in Joules?
    (e) If Brutus completes the lift in 2.4 s, how much power is developed?


    2. Relevant equations
    W=FdCos
    P=W/t


    3. The attempt at a solution
     
  2. jcsd
  3. Dec 2, 2009 #2
    Re: Energy and Momentum Problem...HELP!!

    you know the mass. and the distance that the mass is lifted.
    so calculate the force of the mass
    then calculate the work done
     
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