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This demonstration shows Conservation of Angular Momentum. An individual sits in the chair holding the hand weights with arms extended. This person is slowly rotated. If they pull their arms into their chest, the rotation speeds up. If the arms are extended again, the rotation slows back to the original speed.
* 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 hand weights at the front of the room. Do not leave it on the cart!
A person should sit on the stool holding the hand weights with their arms extended. Start the stool slowly spinning. The person should bring their arms into their chest. They will spin faster. If they extend their arms again, they will slow down.
Notes:
Remove the stool from the cart before using.
Be careful not to fall off the stool.
The person will usually feel a Coriolis Force.
Courses Used In:
PHY 10111
PHY 10310
PHY 10410
PHY 30210
Discussion and Polling Questions:
As the masses move inward, does the angular momentum increase or decrease?
What about the moment of inertia?
What about the angular velocity?
Equipment Needed:
Rotating Stool Platform
Hand weights
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