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Frictional Force

Work done by ...

Question

Work done by kinetic friction on a system is always negative on the system.

A

True

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B

False

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C

Ambiguous

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D

Data insufficient

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Solution

The correct option is A True
Kinetic friction always works to resist motion. Hence, it always acts in a direction opposite to that of motion and hence is negative with respect to the surface.

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The work done by kinetic friction on an object is always negative.

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