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A man of mass m is standing on a plank o...

A man of mass m is standing on a plank of equal mass m resting on a smooth horizontal surface. The man starts moving on the plank with speed u relative to the plank. The speed of the man relative to the ground is

A

2u

B

`u/2`

C

zero

D

`u/4`

Text Solution

Verified by Experts

The correct Answer is:
B
`m(u-v) = mv`
`therefore v=(u)/(2)`

`therefore` Velocity of man relative to ground = u-v=u/2`
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