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A body of mass m moving with velocity u ...

A body of mass m moving with velocity u collides head on elastically with another body of mass 2m at rest. The ratio of kinetic energy of the colliding body before and after collision is

A

`4 : 1`

B

`9 : 1`

C

`2 : 3`

D

`5 : 4`

Text Solution

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The correct Answer is:
B
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