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A ball of mass m is just disturbed from ...

A ball of mass m is just disturbed from the top of a fixed smooth circular tube of radius a in a vertical plane and falls impinging on a ball of mass 2m at the bottom. The coefficient of resitution is 1/2. Find the heights to which the balls rise after a second impact.

A

`(a)/(2), (a)/(8)`

B

`(a)/(2), (a)/(2)`

C

`(a)/(4), (a)/(2)`

D

`(a)/(8), (a)/(8)`

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The correct Answer is:
A
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