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A particle of mass m moving with kinetic...

A particle of mass `m` moving with kinetic energy `K`, makes a head - on elastic collision with a stationary particle of mass `eta m`. 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`

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The correct Answer is:
A
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