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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 J) in pulling the entire chain on the table [ Take g=10m/s2]

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answer is 3.6.

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Detailed Solution

Fraction of length of the chain hanging from the table =1n=60cm200cm=310⇒n=103Work done in pulling the chain on the tableW=mgL2n2=4×10×22×(10/3)2=3.6J

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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 J) in pulling the entire chain on the table [ Take g=10m/s2]