A ball is dropped onto a floor from a he...

A ball is dropped onto a floor from a height of `10 m`. If `20%` of its initial energy is lost,then the height of bounce is

`2 m`

`4 m`

`8 m`

`6.4 m`

Text Solution

Verified by Experts

The correct Answer is:

`E_(f) =80%of E_(i) rArr mgh' =(0.8) mgh`
or `h' =0.8 h=8m`.

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