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a uniform rod of length l and mass m is free to rotate abot a frictionless pivot at one end.the rod is held at rest in the horizontal position and a coin of mass m is placed at the free end. now the rod is released.the reaction on the coin immediately after the rod starts falling is?i want answer till end please rather than how to do it as i had tried it and the answer is not matching.

a uniform rod of length l and mass m is free to rotate abot a frictionless pivot at one end.the rod is held at rest in the horizontal position and a coin of mass m is placed at the free end. now the rod is released.the reaction on the coin immediately after the rod starts falling is?i want answer till  end please rather than how to do it as i had tried it and the answer is not matching.

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