PURPOSE: To show qualitatively an example of non-conservation of angular momentum.
DESCRIPTION: The speed of the rotating puck increases as the radius of the path decreases. Angular momentum is not conserved because the force is not central.
REFERENCES: (PIRA unavailable.) See Marion and Hornyak, Problem 10-18.
EQUIPMENT: Air table with tetherball attachment.
SETUP TIME: 5 min.
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