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Homework Help: Work Done by Force

  1. Jun 23, 2006 #1
    I have spent the last hour on this problem and I just can't seem to come up with the right answer:A 2.8 kg is pushed 1.52 m up a vertical wall with constant force of magnitude F applied at an angle of 63.7 degrees with the horizontal. The acceleration of gravity is 9.8 m/s (seconds squared) If the coefficient of kinetic friction between the block and the was is .586 find the:
    a) work done by F
    b) Find the work done by the force of gravity
    c) Find the work done by the normal force between the block and the wall
    d) by how much does the gravitational potential energy increase during this motion?

    I assumed that I was on the right track when I was trying to find the force by using : F=mu*mg/ cos theta + mu sin theta
  2. jcsd
  3. Jun 23, 2006 #2
    Hint : What are the different forces that the applied force has to overcome and what are their magnitudes and directions ?
    W = F.d

    PS: You might also want to delete your double post .
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