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A uniform rod AB of length 2l and mass 2m has a particle of mass m attached at B. The rod is free to rotate in a vertical plane about a horizontal axis through A. When the rod is hanging at rest with B below A it is given an angular velocity 7/2(g/l)^1/2 . Find the reaction at the axis, when the rod becomes horizontal first.

A uniform rod AB of length 2l and mass 2m has a particle of mass m attached at B. The rod is free to rotate in a vertical plane about a horizontal axis through A. When the rod is hanging at rest with B below A it is given an angular velocity 7/2(g/l)^1/2 . Find the reaction at the axis, when the rod becomes horizontal first.

Grade:12

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