The image above represents polar moment of inertia.

To compute for polar moment of inertia, one essential parameter is needed and this parameter is **Radius (r).**

The formula for calculating polar moment of inertia:

J = ^{πr4}/_{2}

Where:

J = Polar Moment of Inertia

r = Radius

Let’s solve an example;

Find the polar moment of inertia when the radius is 22.

This implies that;

r = Radius = 22

J = ^{πr4}/_{2}

J = ^{π(22)4}/_{2}

J = ^{π(234256)}/_{2}

J = ^{735936.928}/_{2}

J = 367968.46

Therefore, the **polar moment of inertia **is **367968.46 m ^{4}.**

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