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Force and Work Problem

  1. Oct 22, 2007 #1


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    1. The problem statement, all variables and given/known data
    A person pushes a 10.0 kg mass up a 7.60 m long, 20 degree ramp( mu=.170) with a horizontal force of 70.0N. Find the work done by the person and the heat energy generated by friction.
    the answer for heat energy i canot get..its supposed to be 150J

    2. Relevant equations

    3. The attempt at a solution
    a)7.14x70 = 500J
    Fperp=70tan20 ?
    Fparalell=70/cos20=74.5N ?
  2. jcsd
  3. Oct 22, 2007 #2


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    please help both of my problems posted are due tommorow worht marks and im so lost please !!!
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