Question

A ball is dropped on the ground from a height of `1m`. The coefficient of restitution is `0.6`. The height to which the ball will rebound is
A. `0.6m`
B. `0.4m`
C. `0.36m`
D. `0.16m`

Answer 1

Correct Answer - C
Here, `h_(1)=1m, h_(2)=?`
From `e=(upsilon_(2))/(upsilon_(1))=0.6`, `upsilon_(2)=0.6 upsilon_(1)`
As `(h_(2))/(h_(1))=(upsilon_(2)^(2))/(upsilon_(1)^(2))=(0.6)^(2)=0.36`
`:. H_(2)=0.36h_(1)=0.36 m `