Question

What wil be the moment of inertia of disc

Answer 1

$\huge\underline{Answer}$

The moment of inertia of a thin circular disk is the same as that for a solid cylinder of any length, but it deserves special consideration because it is often used as an element for building up the moment of inertia expression for other geometries, such as the sphere or the cylinder about an end diameter.

Answer 2

The Perpendicular Axis Theorem may be used to find out the moment of inertia of a rigid object, lying entirely within a plane, about an axis perpendicular to the plane, given the moments of inertia of the object about two perpendicular axes lying within the plane.

Iz = 1/2 mr²

Ix = Iy = 1/4 mr²