Q .     The force constant of a spring gun is `50\N//m`. If a ball of `20` g be shoot by the gun, so that its spring is compressed by `10 \ cm`, the velocity of the ball is:

BITSAT 2011
A

`5\m//s`

B

`15\m//s`

C

`25\m//s`

D

`20\m//s`

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