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A particle of mass m(1) = 4 kg moving at...

A particle of mass `m_(1) = 4 kg` moving at `6hatims^(-1)` collides perfectly elastically with a particle of mass `m_(2) = 2` moving at `3hati ms^(-1)`

A

velocity of centre mass is `5hat(i)m//s`

B

The velocities of the particles relative to the centre of mass have same magnitude

C

Speed of individual particle before and after collision remains same

D

The velocity of particles relative to CM after collision are `vec(V)_(1f//cm)=-hat(i)m//s vec(V)_(2f//cm)=-2hat(i)m//s`

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The correct Answer is:
A, D
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