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  4. An inelastic ball is dropped from a height 100 meter . If due to impact it loses 35 % of its energy the ball will rise to a height of

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Q. An inelastic ball is dropped from a height $100 \, meter$ . If due to impact it loses $35\%$ of its energy the ball will rise to a height of

NTA AbhyasNTA Abhyas 2020Work, Energy and Power

Solution:

Loss of energy $=35\%$
Remaining energy $=65\%$
New energy $=65\%$ of initial energy
$mgh^{′}=\frac{65}{100}mgh$
$h^{′}=\frac{65}{100}\times 100$
$h^{′}=65 \, \text{m}$