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A particle of mass m is moving in a hori...

A particle of mass m is moving in a horizontal circle of radius r, under a centripetal force equal to `-(k//r^2)` where k is constant. The total energy of the particle is

A

`-K//2r`

B

`K/4r`

C

`K/r`

D

None

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The correct Answer is:
A
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