A uniform chain of length 2m 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 4kg. The work done in pulling the entire chain on the table in Joule is_____. $(g = 10 m s^{- 2})$
(Round off to nearest integer)

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Detailed Solution

length of the chain hanging, $l = 0.6 m$

mass of the hanging chain, $m_{l} = \frac{M l}{L} = \frac{4 \times 0.6}{2} = 1.2 k g$

work-done to pull the chain on the table,

$W = ∆ P_{E} = m_{l} g \frac{l}{2} = 1.2 \times 10 \times 0.3 = 3.6 J$

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