Work done and friction problem

  • #1
A force of 52 N is applied to a 12 kg mass resting on a bench where the force of sliding friction is 15 N. The work done in overcoming friction while moving the object 24 m is


w=fd
w=(37N)(24m)
w=888J


Does this procedure seem correct ? :) Thank you!
 

Answers and Replies

  • #2
PhanthomJay
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No. You have calculated the net force and net (total) work done on the object. The total work done on the object includes the work done by the applied 52 N force, and the work done by the friction force. The work done to overcome friction is the work necessary to keep the object moving at constant velocity.
 
  • #3
What formula would I use to find the work done to overcome friction? I sort of understand but am still a bit confused
 
  • #4
PhanthomJay
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The work done to overcome friction while moving the block 24 m is the negative of the work done by friction while moving the block 24 m.
 
  • #5
So it would be -888J?
 
  • #7
PhanthomJay
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