A 4.0-kg block is lowered down a 37 incline a distance of 5.0 m from point A to point B. A horizontal force (F = 10 N) is applied to the block between A and B as shown in the figure. The kinetic energy of the block at A is 10 J and at B it is 20 J. How much work is done on the block by the force of friction between A and B?
A) (-58 J)
B) (-53 J)
C) (-68 J)
D) (-63 J)
E) (-47 J)
Correct Answer:
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