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A long rod ABC of mass "m" and length "L...

A long rod `ABC` of mass "m" and length "L" has two particles of masses "m" and "2m" attached to it as shown in the figure. The system is initially in the horizontal position. The work to be done to keep it vertical with `A` hinged at the bottom is
.

A

`2mgL`

B

`3mgL//2`

C

`5mgL//2`

D

`3mgL`

Text Solution

Verified by Experts

The correct Answer is:
D
`W = mg L/(2) + mg "(L)/(2) + 2mgL`.
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