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The spacecraft of mass M moves with velo...

The spacecraft of mass M moves with velocity v in free space at first, then it explodes breaking into two pieces. If after explosion a piece of mass m comes to rest, the other piece of space craft will have a velocity :

A

`mv/M-m`

B

`M+m/Mv`

C

`Mv/M-m`

D

`Mv/m`

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