Question

A body is allowed to fall on the ground from a height `h_(1)`. If it is rebound to a height `h_(2)` then the coefficient of restitution is:
A. `(h_(2))/(h_(1))`
B. `sqrt((h_(2))/(h_(1)))`
C. `(h_(1))/(h_(2))`
D. `sqrt((h_(1))/(h_(2)))`

Answer 1

Correct Answer - A
`u_(1) = - sqrt(2 gh). V_(2) = sqrt(2 gh)`. Since `u_(2) = v_(2) = 0`
`e = (-v_(1))/(u_(1)) = sqrt((h_(2))/(h_(1)))`