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A sphere of mass m moving with constant ...

A sphere of mass `m` moving with constant velocity `u`, collides with another stationary sphere of same mass. If `e` is the coefficient of restitution, the ratio of the final velocities of the first and second sphere is

A

`(1-e)/(1+e)`

B

`(1+e)/(1-e)`

C

`(e+1)/(e-1)`

D

`(e-1)/(e+1)t^(2)`

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The correct Answer is:
A
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