6-Video for Polar moment of inertia for a rectangle section

Last Updated on July 28, 2026 by Maged kamel

Video for Polar moment of inertia for a rectangle section.

How do we get the expression for the Polar moment of inertia for a rectangle? A video also illustrates another way to find the product of inertia Ixy at the Cg for a rectangle.

The Timestamps for the video are shown.

0:00 –Use an area (dx*dy) to get the Ixy for the rectangle as a third proof.
2:19 –How to find the polar moment of inertia for a rectangle?
3:02 –How to find the polar moment of inertia for a rectangle at the Cg?

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The related post is Post 5-Easy approach for Product of inertia Ixy for a rectangle.

There is a newly added video, 7-Video, for practice problem-1 for the moment of inertia.