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AB and CD are two smooth parallel walls....

AB and CD are two smooth parallel walls. A child rolls a ball along ground from A towards point P find PD so that ball reaches point B after striking the wall CD. Given coefficient of restitution e = 0.5 :

A

1m

B

0.5 m

C

1.2 m

D

0.6 m

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The correct Answer is:
D
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