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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A man starts walking from a point on the surface of the earth (assumed smooth) and reaches the diagonally opposite point. What is the work done by him? [DCE 2004]

Answer: (A)

Solution

On a perfectly smooth (frictionless) surface, no horizontal force is needed to keep the man moving at constant

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Question ID VK-153862