human
I'd like to learn more about the physics of juggling. Can you help me?
assistant
Sure, I can certainly help you with that! Juggling is a very interesting physical phenomenon and there are many different ways to think about it. One way to start is by looking at how the center of mass (COM) of an object moves as it is thrown or caught. The COM is the point where all the objects' masses are combined into one single object, which means that if you throw a ball in the air, its COM will move up and down as it flies through the air. This motion is called the parabola of the thrown object. You may have noticed that when you juggle three balls, they don't always come back to your hand in the same order. In fact, they usually end up going around each other in a circle before coming back to your hand. This is because the balls are rotating around each other as they go around in circles. As the balls rotate, they also change their speed, so sometimes they'll be moving faster than others.