Question

A ball is dropped from a height 10 m above the ground. If the coefficient of restitution between the ball and ground is 0.7. The height to which the ball rebounds is :

• A. 4.9 m
• B. 5.1 m
• C. 7 m
• D. 3 m

Answer 1

Answer: (C)

7 m

C. $7m$

Given,

$h=10m$

$e=0.7$ coefficient of restitution

The height $H$ to which the ball rebounds,

$H=eh$

$H=0.7\times 10$

$H=7m$