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A man of mass m moves with a constant sp...

A man of mass m moves with a constant speed on a plank of mass M and length l kept initially at rest on a frictionless horizontal surface, from one end to the other in time t. The speed of the plank relative to grounud while man is moving, is

A

`(L)/(t) ((M)/(m))`

B

`(L)/(t) ((m)/(M + m))`

C

`(L)/(t) ((M)/(M - m))`

D

None of these

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DC PANDEY ENGLISH-CENTRE OF MASS, IMPULSE AND MOMENTUM-Comprehension type questions
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