Q.
Two billiard balls of same size and mass are in contact on a billiard table. A third ball of the same size and mass strikes symmetrically and then comes to rest right after the impact. The coefficient of restitution between the balls is
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a
12
b
32
c
23
d
94
answer is C.
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Detailed Solution
sinθ=r2r=12 θ=30oFrom conservation of momentum mu=2mvcos30o⇒V=u3e=vucos30o=u/33u2=23
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