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A man of mass M stands at one end of a s...

A man of mass M stands at one end of a stationary plank of length L, lying on a smooth surface. The man walks to the other end of the plank. If the mass of the plank is `M//3`, the distance that the man moves relative to the ground is

A

`(3L)/(4)`

B

`L/4`

C

`(4L)/(5)`

D

`L/3`

Text Solution

Verified by Experts

The correct Answer is:
B

`M/3x=M(L-x)`
`x=3/4L`
`:.` Displacement of man relative to ground
`=L-x=L/4`
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