The square lamina of side 'b' has same mass as a disc of radius R. The M.I. of the two about an axis perpendicular to the plane and passing throught the centre are equal. The ratio b/R is

The square lamina of side 'b' has same mass as a disc of radius R. The M.I. of the two about an axis perpendicular to the plane and passing through the centre are equal. The ratio b/R is

Radius of gyration of disc rotating about an axis perpendicular to its plane passing through its centre is (If R is the radius of disc)

Radius of gyration of disc rotating about an axis perpendicular to its plane passing through through its centre is (If R is the radius of disc)

The M.I. of a uniform semicircular disc of mass M and radius R about a line perpendicular to the plane of the disc and passing through the centre is

Find the moment of inertia of a uniform half-disc about an axis perpendicular to the plane and passing through its centre of mass. Mass of this disc is M and radius is R.

Two thin discs each of mass M and radius r metre are attached to form a rigid body as shown in figure. The rotational inertia of this body about an axis perpendicular to the plane of disc B and passing through its centre is