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Question

A particle of mass m1, moves with velocity v1 and collides with another particle at rest of equal mass. The velocity of the second particle after the elastic collision is

A
2v1
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B
v1
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C
v1
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D
0
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Solution

The correct option is C v1
For elastic collision
v2=(m2m2m1+m2)u2+2m1v1m1+m2
Because another body is initially at rest
i.e., u2=0
Velocity of the second particle
v2=2m1v12m1
v2=v1

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