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Q.

A heavy ball moving with speed v collides with a tiny ball at rest. The collision is elastic, then immediately after the impact, the second ball will move with a speed approximately equal to

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a

v

b

2v

c

v2

d

v3

answer is B.

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Detailed Solution

v2 =(m2−m1m1+m2)u2+(2m1m1+m2)u1Submitting  m2≈0 and u2=0  we get ,  V2≈2v
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