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A ball of mass 3 kg moving with a veloci...

A ball of mass 3 kg moving with a velocity of `3 m//s` collides with another ball of mass 1 kg moving with velocity u in the opposite direction. If the first ball comes to rest after the impact and e=2/7, then u is in `m//s`, is

A

`13/3`

B

`17/3`

C

`19/3`

D

`23/3`

Text Solution

Verified by Experts

The correct Answer is:
C
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