PURPOSE: To illustrate the complex motion resulting from addition of two angular velocities.
DESCRIPTION: The rotating disc with the lamp attached to its perimeter can spin in its mount on low-friction bearings. Simultaneously, the mount can be rotated using the hand rotator. As the light bulb rotates about the two axes it traces out motion which is the sum of two angular velocities.
SUGGESTIONS: Requires darkend room.
REFERENCES: (PIRA 1D10.40)
EQUIPMENT: Hand rotator, rotating disc with light, as photographed.
SETUP TIME: None.
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