Meriam, Kraige & Bolton — Introduction to Three-Dimensional Dynamics of Rigid Bodies: Problem 7_108

7/108 The solid circular disk of mass \( m \) and small thickness is spinning freely on its shaft at the rate \( p \). If the assembly is released in the vertical position at \( \theta = 0 \) with \( \dot{\theta} = 0 \), determine the horizontal components of the forces \( A \) and \( B \) exerted by the respective bearings on the horizontal shaft as the position \( \theta = \pi/2 \) is passed. Neglect the mass of the two shafts compared with \( m \) and neglect all friction. Solve by using the appropriate moment equations.