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Work Sled problem

  1. Oct 17, 2008 #1
    1. The problem statement, all variables and given/known data

    A father pushes horizontally on his daughter’s sled to move it up a snowy incline, If the sled moves up the hill with a constant velocity, how much work is done by the father in moving it from the bottom to the top of the hill? (angle of incline is 15 degrees
    F + f(k) + mg = 0
    F= -f(k)-mg
    = -(-66.2N) - (-88.7N)
    = 66.2N + 88.7N
    = 154.9N

    Work, w=fd
    =154.9N * 13.9m
    2153J




    2. Relevant equations work = force,f * Distance, d



    3. The attempt at a solution

    F + f(k) + mg = 0
    F= -f(k)-mg
    = -(-66.2N) - (-88.7N)
    = 66.2N + 88.7N
    = 154.9N

    Work, w=fd
    =154.9N * 13.9m
    2153J
     
  2. jcsd
  3. Oct 17, 2008 #2
    Is that the entire question?
     
  4. Oct 17, 2008 #3
    yes
    the plane makes an angle of 15 degrees with the horizontal
    it has a height of 3.6m from the ground
    thanks
     
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