Question: 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

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

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