From a circular disc of mass M and radius Ra circular portion of radius R/2 is removed as shown in ligure. (a) the axis shown is a principal axis (b) center of mass is at a distance R/4 from point '0' 5MR? (c) moment of inertia about the axis shown is 32 11MR? (d) moment of inertia about the axis shown is 64

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Moment of Inertia

Inertia can be termed as a resistance offered by a body to change its state. A rigid body initially at rest will apply resistance when acted by an external force that tends to change its state of rest or velocity, or a body initially at motion will provide resistance in changing its state of velocity or motion for coming to a state of rest. In other words, Newton's first law of motion describes the law of inertia of a rigid body.