A chain is held on a frictionless table with one third of its length hanging over the edge. The total length of the chain is 1 and its mass is m. The work required to pull the hanging part back to the table is

A chain is held on a frictionless table with one third of its length h

1.	A chain is held on a frictionless table with one third of its length hanging over the edge. The total length of the chain is 1 and its mass is m. The work required to pull the hanging part back to the table is
A.	\[2mgl\]
B.	\[\frac{mgl}{5}\]
C.	\[\frac{mgl}{9}\]
D.	\[\frac{mgl}{18}\]
Answer» E.

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A chain is held on a frictionless table with one third of its length hanging over the edge. The total length of the chain is 1 and its mass is m. The work required to pull the hanging part back to the table is

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