The area moment of inertia which is also called the second moment of area defines the resistance of a cross-section for example beams to bending, also due to the shape of the cross-section. It is a key parameter for the analysis of beams and columns. To understand moment of inertia you need to go back to basic of how we defined moment of area in engineering mechanics or statics class. This moment of inertia physics meaning the moment of inertia is also discuss in physics class, has a profound impact on the world of structural engineering.

In this video we will discuss area moment of inertia in depth, how's it calculated, and how it's used. I also cover key related topics, including the moment of inertia of a rectangle, concept related to the parallel axis theorem and you will get some basic understanding which will be helpful understanding Mohr's circle for moments of inertia.
The second moment of area can also be called moment of Inertia.

https://www.youtube.com/watch?v=KZUSz4b3z9c