Work Energy And Power Question 119

Question: A body of mass 5 kg moving with a velocity 10m/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 [Pb. PMT 1999; KCET 2001]

Options:

A) 2.5 m/s

B) 5 m/s

C) 7.5 m/s

D) 10 m/s

Show Answer

Answer:

Correct Answer: A

Solution:

Momentum conservation $ 5\times 10+20\times 0=5\times 0+20\times v $

therefore $ v=2.5m/s $



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