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A ball is dropped from a height h on to ...

A ball is dropped from a height h on to a floor and undergoes multiple bounces. If in each collision its speed becomes 'e' times of its striking value, the time taken by the ball between first bounce and second bounce is :

A

`e/g sqrt(2gh)`

B

`2e sqrt((2h)/(g))`

C

`(2esqrt(h))/(g)`

D

`(2esqrt(g))/(h)`

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