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Two men A and B of masses 50kg and 20g r...

Two men `A` and `B` of masses `50kg` and `20g` respectively are at rest on a frictionless surface as shown in figure. If `A` pushes `B` with relative velocity `0.7m//s` then find velocity of `A` just after the push.

A

`0.2m//s`

B

`1m//s`

C

`5m//s`

D

`4m//s`

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The correct Answer is:
A
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