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A ball at rest is dropped freely from a height of `20 m`. It loses `30 %` of its energy on striking the ground and bounces back. The height to which i

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A ball at rest is dropped freely from a height of `20 m`. It loses `30 %` of its energy on striking the ground and bounces back. The height to which it bounces back is
A. 14 m
B. 12 m
C. 9 m
D. 6 m
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Correct Answer - A
percentage loss of `PE = (h_(1) - h_(2))/(h_(1)) xx 100 %`.
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