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Questions  

A body of mass 5 kg moving with a velocity 10 m/s collides with another body of the mass 20 kg at rest and comes to rest. The velocity of the second body due to collision is

a
2.5 m/s
b
5 m/s
c
7.5 m/s
d
10 m/s

detailed solution

Correct option is A

Momentum conservation5×10+20×0=5×0+20×v⇒v=2.5 m​/​s

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