A ball is dropped onto a fixed horizontal surface from aheight h. The coefficient of restitution is e. The average speed of the ball during its motion is

Options

A. `[(1+e)/(1-e)]^(2)`
B. `[((1+e)^(2))/(1-e^(2))]`
C. `[(1+e^(2))/((1+e)^(2))]sqrt((gh)/(2))`
D. `[((1-e)^(2))/(1-e^(2))]sqrt((gh)/(2))`

Answer

C