A chain of mass $m$ and length $l$ is hanging freely from edge $A$ (as shown in diagram $I$ ). Calculate the work done to fold it as shown in diagram $(II)$
A chain of mass $m$ and length $l$ is hanging freely from edge $A$ (as shown in diagram $I$ ). Calculate the work done to fold it as shown in diagram $(II)$
- A
$mg\frac{l}{2}$
- B
$-mg\frac{l}{2}$
- C
$mg\frac{l}{4}$
- D
$-mg\frac{l}{4}$
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- [AIIMS 2019]
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