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A heavy steel ball of mass greater than ...

A heavy steel ball of mass greater than 1 kg moving with a speed of 2 m `sec^(-1)` collides head on with a stationary ping-pong ball of mass less than 0.1 gm. The collision is elastic. After the collision the ping-pong ball moes approximately with speed

A

`2msec^(-1)`

B

`4msec^(-1)`

C

`2xx10^(4)msec^(-1)`

D

`2xx10^(3)msec^(-1)`

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The correct Answer is:
B
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