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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 a constant. The total energy of the particle is -

A

`-(k)/(2r)`

B

`-(k)/(r)`

C

`-(2k)/(r)`

D

`-(4k)/(r)`

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The correct Answer is:
A
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