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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A rod AB of mass 10 kg and length 4 m rests on a horizontal floor with end A fixed so as to rotate it in a vertical plane about a perpendicular axis passing through A. If the work done on the rod is 100 J, the height to which the end B be raised vertically above the floor is

Answer: (B)

Solution

As the rod rotates, its centre of mass (at l/2 from A) rises to h/2 when end

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Question ID VK-153558