A ball is allowed to fall from a height of \( 20 \mathrm{~m} \). If there is \( 50 \% \) loss of...

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A ball is allowed to fall from a height of \( 20 \mathrm{~m} \). If there is \( 50 \% \) loss of energy due to impact, then after one impact ball will go up to
a. \( 20 \mathrm{~m} \)
b. \( 15 \mathrm{~m} \)
c. \( 20 \mathrm{~m} \)
d. \( 10 \mathrm{~m} \)
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