Multiple Choice
A 3.0-kg block is dragged over a rough horizontal surface by a constant force of 16 N acting at an angle of 37° above the horizontal as shown. The speed of the block increases from 4.0 m/s to 6.0 m/s in a displacement of 5.0 m. What work was done by the friction force during this displacement? 
A) −34 J
B) −64 J
C) −30 J
D) −94 J
E) +64 J
Correct Answer:
Verified
Correct Answer:
Verified
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