A smooth chain of length 2 m is kept on a table such that its length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. The work done in pulling the entire chain o…

Question

A smooth chain of length 2 m is kept on a table such that its length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. The work done in pulling the entire chain on the table is (taking g=10 m/s^2 )

Accepted Answer

Correct answer: A. (a) : Mass of length 2 m of the chain =4 kg Mass of length 60 cm or 0.60 m of the chain = 4 0.602=1.2 kg Weight of the hanging part of the chain =1.2 10=12 N Since the centre of gravity of the hanging part lies at its mid- point, i.e., 30 cm or 0.30 m ∴ W=12 0.30=3.6 J

$A smooth chain of length 2 m is kept on a table such that its length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg . The work done in pulling the entire chain on the table is (taking g = 10 m / s^{2})$

Solution

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