In the figure given below, the moment of inertia about polar axis OP is _______
(a) mr^2/2
(b) mr^2
(c) 2mr^2
(d) 4mr^2
I had been asked this question at a job interview.
The doubt is from Effect of Gyroscopic Couple on a Disc Fixed Rigidly at a Certain Angle to a Rotating Shaft topic in division Gyroscopic Couple and Precessional Motion of Machine Dynamics