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As an object moves from point A to point B only two forces act on it: one force

ID: 1290384 • Letter: A

Question

As an object moves from point A to point B only two forces act on it: one force is non-conservative and does ?30 J of work, the other force is conservative and does +50 J of work. Between A and B, the object's

A. kinetic energy increases and its total mechanical energy decreases.

B. kinetic energy increases and its total mechanical energy increases.    

C. kinetic energy decreases and its total mechanical energy increases.

D. kinetic energy increases and its total mechanical energy remains constant.

Explanation / Answer

A. kinetic energy increases and its total mechanical energy decreases.

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