I need to find the work

  • Thread starter kaspis245
  • Start date
  • #1
kaspis245
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Homework Statement


Force magnitude at the beginning 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.

Homework Equations


A = Fs

The Attempt at a Solution


A = Fs = (F2-F1)s = 432 J

Is it correct?
 
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Answers and Replies

  • #2
PhanthomJay
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Homework Statement


Force magnitude at the beginning 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.

Homework Equations


A = Fs

The Attempt at a Solution


A = Fs = (F2-F1)s = 432 J

Is it correct?
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.
 
  • #3
kaspis245
189
1
What about now:

b4td1v.jpg
 
  • #4
PhanthomJay
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