Question

Assertion (A) : When a body moving with certain velocity collides with another body of same mass at rest, the collision being perfectly elastic head on collision, 100% of its K.E is transferred to the latter

Reason (R) : Both momentum and K.E are conserved in the case of perfectly elastic collision

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Solution

The correct option is **A** Both Assertion (A) and Reason (R) are correct and R is the correct explanation

If a body moving with certain velocity collides with another body of same mass at rest, the collision being perfectly elastic head on collision. then by solving the equations of conservation of momentum and elastic collision, the 2nd particle moves with the same velocity as the earlier velocity of 1st particle and first one comes to rest. Hence, 100% K.E. is transferred and K.E. is also conserved.

If a body moving with certain velocity collides with another body of same mass at rest, the collision being perfectly elastic head on collision. then by solving the equations of conservation of momentum and elastic collision, the 2nd particle moves with the same velocity as the earlier velocity of 1st particle and first one comes to rest. Hence, 100% K.E. is transferred and K.E. is also conserved.

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