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A particle is moving in a circle of radi...

A particle is moving in a circle of radius r under the action of a force F=`alphar^(2)` which is directed towards centre of the circle.Total mechanical enery (kinetic energy+potential energy)of the particle is (take potential energy=0 for r=0)

A

`1/2alphar^3`

B

`5/6alphar^3`

C

`4/3alphar^3`

D

`alphar^3`

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