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A uniform chain of length L and mass M is lying on a smooth table and one third of its length is hanging vertically down over the edge of the table. If g is acceleration due to gravity, work required to pull the hanging part on to the table is

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By Expert Faculty of Sri Chaitanya
a
MgL
b
MgL3
c
mgL9
d
mgL18
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detailed solution

Correct option is D

The weight of hanging part (L3) from the table.As work done = force ×distanceW = Mg3×L6 = MgL18

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