A uniform chain has a mass m and length l. It is held on a frictionless table with one-sixth of its length hanging over the edge. The work done in just pulling the hanging part back on the table is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Weight of overhanging part of the chain 
The weight acts at the centre of gravity of the hanging part, i.e., 
below the surface of the table.
Gain in potential energy 
Work done 
gain in potential energy 
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