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Kinetic Energy

The force, ...

Question

The force, $F$ , acting on a body moving in a circle of radius, $r$ , is always perpendicular to the instantaneous velocity, $v$ . The work done by the force on the body in half rotation is

A

F v

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B

F .2 π r

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C

F r

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D

0

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Solution

The correct option is A $0$
Work done by centripetal force is zero.

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