Hello guys. I need help to understand the calulation of bending stress. This topic is discussed in our lecture, and the prof shows us an animation for it. However, this topic is not on the textbook and the prof refuse to give us the link for the animation. I am wondering, do any of you know where could I find a good place to study for this topic. The current discussion is only limited to the moment of inertia, compression and tension stress, of the I, and T shape beams made up of rectangular cross -section. Thank you all in advance!