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A 20-Kg Block Slides Down a Plane (Inclined at 40° with with the Horizontal)

Question 46

Multiple Choice

A 2.0-kg block slides down a plane (inclined at 40° with the horizontal) at a constant speed of 5.0 m/s. At what rate is the gravitational force on the block doing work?


A) +98 W
B) +63 W
C) zero
D) +75 W
E) −75 W

Correct Answer:

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