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A smooth circular table is surrounded by...

A smooth circular table is surrounded by a rim whose interior is vertical . A ball is projected along the table from a point on the rim in a direction making an angle `theta` to the radius through the point and returns to the point of projection after two impacts . If e be the coefficient of restitution, then

A

`tan theta = sqrt(((e^(3))/( 1+ e + e^(2))))`

B

`tan theta sqrt((e^(2))/( 1+ e))`

C

`tan theta = sqrt((1)/( e ))`

D

`tan theta = e `

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The correct Answer is:
A
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