, , A uniform chain of length L and mass M is lying on a smooth table and 2/3 of its length is ha...

, , A uniform chain of length L and mass M is lying on
a smooth table and 2/3 of its length is hanging down
over the edge of the table. If g is the acceleration
due to gravity, the work done to pull the hanging part on the table is :-
(1) MgL
(2) MgL/3
(3) MgL/9
(4) 2 MgL/9,
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