Question

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)`

Answer 1

Correct Answer - A
`v_(n) = e^(n)v` where `v = sqrt(2gh)`