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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

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: (B)

Solution

Mass per unit length = 4/2 = 2 kg/m, so the hanging part (0.6 m) has mass 1.2 kg, with

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Question ID VK-153545