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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A man slowly pulls a bucket of water from a well of depth h = 20 m. The mass of the uniform rope and the bucket full of water are m = 200 gm and M = 19.9 kg, respectively. Find the work done (in kJ) by the man.

Answer: 4

Solution

As the rope is pulled up uniformly, its centre of gravity rises through h/2, while the bucket (treated as a point mass at the bottom

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Question ID VK-153833