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This demonstration shows Conservation of Angular Momentum. A person sits on the stool platform and holds a spinning wheel. If they change the orientation of the wheel, the person will rotate so that the total angular momentum of the system remains the same.
* Equipment seen in the video may vary from equipment used in ND Demonstrations. See information and images below for ND equipment and setup.
Setup:
Place the rotating stool platform and bicycle wheel at the front of the room. Do not leave it on the cart!
A person should sit on the stool holding the bicycle wheel upright. Start the bicycle wheel spinning in the vertical plane.. The person should rotate the wheel in to the horizontal plane in one direction. The stool and person will rotate. If they return the bicycle wheel to its' original orientation they will stop. The wheel can be turned horizontally in the other way to see the system spin in the opposite direction.
This can also be started horizontal plane and turned all the way over.
Notes:
Be sure that the person with the bicycle wheel does not have any loose clothing that could get caught in the wheel.
Be careful not to fall off the stool.
Courses Used In:
PHY 10111
PHY 10310
PHY 10410
PHY 20454
PHY 30210
Discussion and Polling Questions:
Which way will the person spin compared to the spinning of the wheel?
If the person puts the wheel back upright, why do they stop?
Which physical quantity is being conserved?
What are some real-world applications of this phenomenon?
Equipment Needed:
Rotating Stool Platform
Bicycle Wheel
Dremel (optional)
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