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A ball falls from a height of 10m on to ...

A ball falls from a height of `10m` on to a horizontal plane. If the coefficient of restitution is `0.4`, then the velocity with which it rebounds from the plane after second collision is

A

`2.24 ms^(-1)`

B

`5.6 ms^(-1)`

C

`2.8 ms^(-1)`

D

`0.9 ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`v_(n) = e^(n)v` where `v = sqrt(2gh)`
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