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Sphere A of mass 'm' moving with a const...

Sphere A of mass 'm' moving with a constant velocity u hits another stationary sphere B of the same mass. If e is the co-efficient of restitution, then ratio of velocities of the two spheres `v_(A):v_(B)` after collision will be :

A

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

B

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

C

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

D

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

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The correct Answer is:
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