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Angular Analogue of Linear Momentum

A body is mov...

Question

A body is moving on a rough horizontal plate in a circular path being tide to a nail (at the centre) by a string, while the body is in motion the friction force of the body

A

changes direction

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B

changes magnitude

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C

changes both magnitude and direction

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D

none of he above

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Solution

The correct option is A changes direction
As the motion is circular, friction opposes the centripetal acceleration, thus its direction changes regularly.

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