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A ball is allowed to fall from a height ...

A ball is allowed to fall from a height of 10m . If there is 40% loss of energy due to impact, then after one impact ball will go up to

A

10 m

B

8 m

C

4 m

D

6 m

Text Solution

Verified by Experts

The correct Answer is:
D
mgh= initial potential energy
mgh. = final potential energy after rebound As 40% energy lost during impact `therefore` mgh= 60^ of mgh
`rArr h. = (60)/(100) xx h= (60)/(100) xx 10= 6m`
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