A uniform chain of mass M and length L is lying on a smooth horizontal table, with half of its length hanging down. The work done is pulling the entire chain up the table is

Question

A uniform chain of mass M and length L is lying on a smooth horizontal table, with half of its length hanging down. The work done is pulling the entire chain up the table is, M g L 2, M g L 4, M g L 8, M g L 16

MARKS App · Accepted Answer

Work done is pulling the entire chain up the table = change in potential energy W = U f - U i ⇒ W = 0 - - M 2 g L 4 = M g L 8

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