A smooth chain of length 
is kept on a table such that its length of 
hangs freely from the edge of the table. The total mass of the chain is 
. The work done in pulling the entire chain on the table is (taking 
)
A
B
12.9 J
C
D
6.3 J
Text Solution
Verified by ExpertsThe correct answer is:
A
: Mass of length 
of the chain 
Mass of length 
or 
of the chain
Weight of the hanging part of the chain
Since the centre of gravity of the hanging part lies at its mid- point, i.e., 
or 
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