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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

1. 7.2 J
2. 3.6 J
3. 120 J
4. 1200 J

Correct answer: 3.6 J

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