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The figure shows a man of mass m standin...

The figure shows a man of mass m standing at the end A of a trolley of maas M placed at rest on a smooth horizontal surface. The man starts moving towards the end B with a velocity `u_(rel)` with respect to the trolley. The length of the trolley is L.

When the man starts moving, then the velocity of the trolley `v_(2)` with respect to ground will be:

A

`(Mu_(rel))/(m+M)`

B

`m(u_(rel))/(m+M)`

C

`(m)/(M)u_(rel)`

D

`(M)/(m)u_(rel)`

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