# Moment of inertia

The Moment of inertia is an important subject in statics, The posts include how to find the proofs of the values of inertia for different common shapes.

## 13-Video-Use a vl strip to get Ix for right-angle case-2.

Video-Use a vl strip to get Ix for right-angle case-2. Derive the expression for Ix at the Cg and estimate the radius of gyration.

## 12-Video for Ix for a right-angle case -2-Use Hl strip.

Video for Ix for a right-angle triangle case 2. By Using a horizontal strip we can obtain ix at the left corner and Ix at the Cg.

## 10-Video for Iy for a right-angle triangle case 1.

Video for Iy for a right-angle triangle case 1. Derive the expression of Iy by using two alternative methods, a horizontal strip and a vertical strip.

## 11-Video for Ixy for a right-angle triangle case 1.

Video for Ixy for a right-angle triangle case 1. How to estimate the product of inertia Ixy for a right-angle triangle case No.1 at the external axis and at the Cg?

## 10-Video for Iy for a right-angle triangle case 1.

Video for Iy for a right-angle triangle case 1. Derive the expression of Iy by using a vertical strip. determine the polar moment of inertia.

## 9-Video for Ix for a right-angle triangle case 1.

Video for Ix for a right-angle triangle case 1. Derive the expression of Ix by using two alternative methods, a horizontal strip and a vertical strip.

## 8-Video for practice problem-2 for the moment of inertia.

A Video for practice problem-2 for the moment of inertia. It required to find the Ix and Ixy for L -shaped section.

## 7-Video for practice problem-1 for the moment of inertia.

A Video for practice problem-1 for the moment of inertia. it required to find the Ix and Kx, Iy and Ky. for a rectangle section.

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

A Video for Polar moment of inertia for a rectangle section. A third method for product of inertia for a rectangle section is added.

## 5-Video for Ixy for a rectangle section.

A Video for Ixy for a rectangle section. Two different methods are shown to get the value of Ixy at the Cg and at a left corner.

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