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I need to find the work

  1. Dec 8, 2014 #1
    1. The problem statement, all variables and given/known data
    Force magnitude at the begining of the road s = 12 m is F1 = 10 N , at the end of the road F2 = 46 N. The force is acting in object's displacement direction. Calculate work done by uniformly changing force.

    2. Relevant equations
    A = Fs

    3. The attempt at a solution
    A = Fs = (F2-F1)s = 432 J

    Is it correct?
     
    Last edited by a moderator: Dec 8, 2014
  2. jcsd
  3. Dec 8, 2014 #2

    PhanthomJay

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    No.

    You can write the force vs. displacement equation and do the calculus for the work done, or make a graph of the force-displacement and find the area under it, or , more easily since the force is uniformly changing with distance, try the average force approach when using your formula. Use all three methods if you want and compare results. Your approach is not correct.
     
  4. Dec 8, 2014 #3
    What about now:

    b4td1v.jpg
     
  5. Dec 8, 2014 #4

    PhanthomJay

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    Looks Good!

    b4td1v.jpg
     
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