A uniform slender rod of mass 350 g/m is used to form the assembly shown. The assembly rot...

A uniform slender rod of mass 350 g/m is used to form the assembly shown. The assembly rotates clockwise at a constant rate of 120 rpm under the combined effect of gravity and the couple M which varies in magnitude and sense. Determine the magnitude and sense of the couple M and the reaction at point A for (a) θ = 90°, (b) θ = 180°.