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  3. A body falling from a height of 20m rebounds from hard floor. If it loses 20% energy in the impact, then find the coefficient of restitution

. A body falling from a height of 20m rebounds from hard floor. If it loses 20% energy in the impact, then find the coefficient of restitution

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Answer: It loses 20% energy in impact and only 80% energy remains with the ball

So, ball will rise upto height  A body falling from a height

Now coefficient of restitution  A body falling from a height

 

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