Mechanics > Rotational dynamics > Conservation of Angular Momentum

CodeDemo NameDescription
1Q40.10 Angular Momentum - Stool and Weights
Angular Momentum - Stool and Weights
Angular Momentum - Stool and Weights
Angular Momentum - Stool and Weights A person on a rotating stool moves dumbbells out and in. A great way to explore the concept of angular momentum.
1Q40.17 Basketball on Rope
Angular Momentum - Basketball on Rope Demo
Angular Momentum - Basketball on Rope Demo
Basketball on RopeDemonstration of angular momentum using a basketball on a rope. By swinging the basketball while siting on a rotating stool demonstrates that you will rotate in the opposite direction of the basketball as it is spun overhead. The longer amount of rope used the faster you will spin.
1Q40.22 Hobermann's Sphere
Hoberman Sphere Demo Set Up
Hoberman Sphere Demo Set Up
Hobermann's SphereThinking about the expansion of the universe, we demonstrate this with the Hoberman's sphere. By expanding the sphere and spinning it, this demonstrates how rotation and expansion directly increases or decreases speed.
1Q40.30 Bike Wheel
Conservation of Angular Momentum Set Up
Conservation of Angular Momentum Set Up
Bike WheelConservation of angular momentum demonstrated by sitting on the stool and holding the spinning bike wheel. To change direction you hold the spinning wheel at different directions/angles.
1Q40.70 Marbles and FunnelThe angular speed of marbles increases as they approach the bottom of a large funnel. A/5 Top
1Q40.80 Hero's EngineCylindrical boiler pivots on a vertical axis with tangential pressure relief nozzles.
Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with Rutgers University and only under the direction of a trained instructor or physicist. Rutgers University is not responsible for any demonstrations performed by those using their own or others equipment, or who choose to use this reference material for their own purpose. The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources. Performing all or any portion of any of these demonstrations, with or without revisions not depicted here, entails inherent risks. These risks include, without limitation, bodily injury (and possibly death), risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition, and property loss or damage. Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.


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