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Q.

A ball A moving with a  certain velocity collides, with another ball B of the same mass at rest. If the coefficient of restitution is e, the ratio of the velocities of A and B just after the collision is

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a

1+e1−e

b

1+e2

c

1−e2

d

1−e1+e

answer is D.

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Detailed Solution

When u2=0 then  v1=m1-em2u1m1+m2=1-emu12m---(1) v2=1+em1u1m1+m2=1+emu12m---(2) (1) /(2) we get v1v2=1-e1+e
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