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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2019
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Q)

Body A of mass 4m moving with speed u collides with another body B of mass 2m, at rest. The collision is head on and elastic in nature. After the collision the fraction of energy lost by the colliding body A is :


( A ) $\frac{8}{9}$
( B ) $\frac{5}{9}$
( C ) $\frac{1}{9}$
( D ) $\frac{4}{9}$

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