Q .14.23 A circular disc of mass is suspended by a wire attached to its centre. The wire is twisted by rotating the disc and released. The period of torsional oscillations is found to be The radius of the disc is . Determine the torsional spring constant of the wire. (Torsional spring constant is defined by the relation, where J is the restoring couple and θ the angle of twist).
Moment of Inertia of the disc about the axis passing through its centre and perpendicular to it is
The period of Torsional oscillations would be