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A block of mass 1 kg is pushed towards a...

A block of mass 1 kg is pushed towards another block of mass 2 kg from 6 m distance as shown in figure. Just after colision velocity of 2 kg block becomes 4 m//s
.

A

Coeffcient of restitution between two blocks is 1

B

Coefficient of restitution between two blocks is 1/2

C

Velocity of centre of mass after 2 s is 2 m/s

D

Ve,pcoty pf centre of mass after 2 s is 1 m/s

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