Moment of inertia of a hollow circular section, as shown in the below figure about X-axis, is

When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as

A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.

Mass moment of inertia of a uni form thin rod of mass M and length (l) about its mid-point and perpendicular to its length is

A redundant frame is also called __________ frame.