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A rope of length l and mass 'm' is conne...

A rope of length `l` and mass 'm' is connected to a chain of length `l` and mass `2 m` and hung vertically as shown. What is the change in graviational potential energy if the system is inverted and hung from same point.
.

A

`mgl`

B

`4 mgl`

C

`3 mgl`

D

`2 mgl`

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A
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