A disc with a radius of gyration of 60 mm and a mass of 4 kg is mounted centrally on a horizontal axle of 80 mm length between two bearings.. It spins about the axle at a speed of 800 rpm CCW when viewed from the Right-hand side Bearing. The precession rotation is 50 rpm in CW direction when viewed from the top as shown in the diagram. Determine the magnitude of resultant reaction at bearing A.
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