Calculate the polar moment of inertia of the following cross section about origin: y, 30 mm 30 mm 10 mm 10 mm (A) 98675.34 mm' (B) 85662.33 mm* (C) 503675.34 mm* (D) 49337.67 mm*

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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.