A metallic circular disc having a circular hole at its centre rotates about an axis passing through its centre and perpendicular to its plane. When the disc is heated:

The moment of inertia of a copper disc, rotating about an axis passing through its centre and perpendicular to its plane

If a circular concentric hole is made on a disc then about an axis passing through the centre of the disc and perpendicular to its plane

Radius of gyration of a uniform circular disc about an axis passing through its centre of gravity and perpendicular to its plane is

A circular disc has a mass of 1kg and radius 40 cm. It is rotating about an axis passing through its centre and perpendicular to its plane with a speed of 10rev/s. The work done in joules in stopping it would be-

Calculate the KE of rotation of a circular disc of mass 1 kg and radius 0.2 m rotating about an axis passing through its centre and perpendicular to its plane. The disc is making 30//pi rotations per minute.

Show that the radii of gyration of a circular ring and circular disc of the same radius about an axis passing through their centres and perpendicular to their plane are in the ratio sqrt(2) : 1 .

The ratio of radii of gyration of a circular ring and a circular disc, of the same mass and radius about an axis passing through their centres and perpendicular to their planes are

A circular disc of radius R and thickness R//6 has moment of inertia I about an axis passing through its centre and perpendicular to its plane. It is melted and recast into a solid sphere. The M.I of the sphere about its diameter as axis of rotation is