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

A uniform chain of length 2 m is kept on a table such that a length of

1.	A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table ?
Answer» 7.2 J 3.6 J 120 J 1200 J Solution :Here, let L be the LENGTH of chain. L= 2m Length hanging verticallly =`(60)/(100)=0.6 m` The w.t of hanging part is acting at C.G. of this part i.e at a distance =`(0.6)/(2)=0.3m` from FREE end. Mass of hanging part `=(4/2xx0.6)=1.2kg`. `:.` Work done =`1.2xx10xx0.3` (`:.` Work done = change in P.E. MGH)

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

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