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Questions  

A ball A, moving with kinetic energy E, makes a head on collision with a stationary ball with mass n times that of A. The maximum potential energy stored in the system during the collision is

a
nE/(n + 1)
b
(n + 1)E/n
c
(n - 1)E/n
d
E/n

detailed solution

Correct option is A

When elastic P.E is maximum, the balls momentarily move together with common velocity v

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