A ball is thrown horizontally from a hei...

A ball is thrown horizontally from a height h above a staircase as shown in the figure. If the coefficient of restitution for any collision between the ball and the staircase is e, then the value of h for which the ball will bounce the same height above each step, is

A

`(d)/(1-e^(2))`

B

`(d)/(1+e^(2))`

C

`(de^(2))/(1+e^(2))`

D

`(de^(2))/(1-e^(2))`

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The correct Answer is:

A

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