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A smooth sphere A of mass m collides ela...

A smooth sphere A of mass m collides elastically with an identical sphere B at rest. The velocity of A before collision is `8 m//s` in a direction making `60^(@)` with the line of centres at the time of impact, Then

A

The spher A comes to rest after collision

B

The sphere B will move with a speed of 8 m/s after collision

C

The directions of motion of A and Bafter collision are at tight angles

D

The speed of B after collsion is 4 m/s

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