spinner caps angular momentum

myminifactory

This object was created using Tinkercad software. https://www.tinkercad.com/things/4qoeo4vyr6D To build a spinner, you need 12 M8 nuts and a 22mm bearing These caps are designed to teach children about the principle of conservation of angular momentum, as shown in the picture and description below. Conservation of Angular Momentum The angular momentum of an isolated system remains constant in both magnitude and direction. Defined as the product of the moment of inertia I and the angular velocity, angular momentum is a vector quantity. The vector sum of the angular momenta of the parts of an isolated system is always constant. This puts strong constraints on the types of rotational motions that can occur in an isolated system. When one part of the system gets an angular momentum in a certain direction, some other part or parts must get exactly the same angular momentum in the opposite direction at the same time. As far as we know, conservation of angular momentum is an absolute symmetry of nature. We don't know anything that violates it.