When the teacher demonstrates angular momentum using a tire and a rope, they are showing how spinning objects resist changes to their motion. Imagine the tire spinning on the rope like a top. Once it starts spinning, it wants to keep spinning in the same direction. This is because of angular momentum, which is like the “keep going” energy of rotation. Just like it’s hard to stop a merry-go-round once it’s spinning fast, it’s hard to change the direction or speed of the spinning tire. This resist