Work done by friction?

  • Thread starter rfig08d
  • Start date
  • #1
10
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Homework Statement



You are pushing a refrigerator across the floor of your kitchen. You exert a horizontal force of 297 N for 6.7 s, during which time the refrigerator moves a distance of 2.8 m at a constant velocity.

What is the work done by friction?

Homework Equations



W=fv
w=f(d/t)

The Attempt at a Solution



w=297(2.8/6.7) = 124 J.

Why is this answer incorrect?
Any info to the right direction is much help :) thanks
 

Answers and Replies

  • #3
10
0
Edit - Right, it'll be -FΔx.

Thanks.
 
Last edited:

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