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Q.

A uniform chain has mass M and length L respectively. It is lying on a smooth horizontal table with half of its length hanging vertically down. The work done in pulling the chain completely on to the table is

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a

MgL/4

b

MgL/8

c

MgL/16

d

MgL/2

answer is C.

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Detailed Solution

$W = \frac{M g L}{2 n^{2}} (n = 2); W = \frac{M g L}{8}$

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