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A monkey of mass 20 kg rides on a 40 kg ...

A monkey of mass 20 kg rides on a 40 kg trolley moving at a constant speed of 8 m/s along a horizontal track. Frictional force can be neglected. If the monkey jumps vertically, with respect to the moving trolley, the catch the overhanging branch of tree, the speed of the trolley after the monkey has jumped off is :-

A

16 m/s

B

12 m/s

C

8 m/s

D

6 m/s

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A
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