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When a sphere rolls without slipping the ratio of its kinetic energy of translation to its total kinetic energy is

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detailed solution

Correct option is D

EkE=12mv212mv2+12Iω2=12mv212mv2+12×25mr2×v2/r2 ∵ I=25mr2 and V=rω=11+(2/5)=57 or 5:7

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