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A moving block having mass m , collides ...

A moving block having mass `m` , collides with another stationary block having mass `4m`. The lighter block comes to rest after collision. When the initial velocity of the block is `v`, then the value of coefficient of restitution `( e)` will be

A

0.8

B

0.25

C

0.5

D

0.4

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The correct Answer is:
B
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