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A sphere of mass 0.5 kg and diameter 1 m...

A sphere of mass 0.5 kg and diameter 1 m rolls without sliding with a constant velocity of `5 m//s`. What is the ratio of the rotational K.E. to the total kinetic energy of thesphere ?

A

`7/10`

B

`5/7`

C

`2/7`

D

`1/2`

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