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A solid sphere having mass m and radius ...

A solid sphere having mass m and radius r rolls down an inclined plane. Then its kinetic energy is

A

`(5)/(7) rotational and (2)/(7) translational`

B

`(2)/(7)` rotational and `(5)/(7)` translational

C

`(2)/(5)` rotational and `(3)/(5)` translational

D

`(1)/(2)` rotational and `(1)/(2)` translational`

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