Rattleback

P.I.R.A. #: 1Q 20.20

Demonstrates: Change in direction of rotational energy.

Description: A large block of wood with a diagonally symmetrical curved bottom surface.
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Quicktime Video
Condition: good. Size: 48" x 5" x 9". Hazard: Toe masher.

Instructions:

Items Used:
Notes: Clockwise rotation gives change in direction.
Schematic: Tech Specs (PDF format):
Mathematical Description / Measured Results:

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