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A body of mass m is moving in a circle o...

A body of mass m is moving in a circle of radius r with a constant speed v. The work done by the centripetal force in moving the body over half the circumference of the circle is

A

`mv^(2)//r`

B

zero

C

`mv^(2)//r`

D

`r^(2)//mv^(2)`

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The correct Answer is:
b
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