Multiple Choice
In the figure,a 700-kg crate is on a rough surface inclined at 30°.A constant external force is applied horizontally to the crate.As the force pushes the crate a distance of
up the incline,the speed changes from 1.40 m/s to 2.50 m/s.How much work does gravity do on the crate during this process?
A) -10,300 J
B) -3400 J
C) +10,300 J
D) +3400 J
E) zero
Correct Answer:

Verified
Correct Answer:
Verified
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