*Please see attachment for diagram, figures and multiple choice answers; please show your work.
If the system is displaced by small angle 'theta' from the vertical, the torque about the fastened end,
Mr*g*sin(theta)*(l/2) + Mo*g*sin(theta)*l = - (Ir+Mr*(l/2)^2 + Io + ...
This solution is provided in 150 words. It uses torque, angular acceleration and simple harmonic motion to find the angular frequency squared.