+1 vote
in Machine Dynamics by (34.3k points)
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

1 Answer

0 votes
by (38.6k points)
The correct answer is (a) mr^2/2

For explanation: In the figure given above, if m is the mass of the disk and r is the radius, then the moment of inertia about the axis OP is given by mr^2/2.

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