If the wheel in case (a) of Prob. 7/108 is forced to precess about the vertical by a mec...

If the wheel in case (a) of Prob. 7/108 is forced to precess about the vertical by a mechanical drive at the steady rate Ω = 2j rad/s, determine the bending moment in the horizontal shaft at A. In the absence of friction, what torque M_O is applied to the collar at O to sustain this motion?