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A particle is moving in a circular path ...

A particle is moving in a circular path of radius a under the action of an attractive potential `U=-(k)/(2r^(2))`. Its total energy is :

A

`-(3)/(2)(k)/(a^(2))`

B

`-(k)/(4a^(2))`

C

`(k)/(2a^(2))`

D

zero

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The correct Answer is:
D
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