PURPOSE: To demonstrate a center of mass paradox.
DESCRIPTION: When the double cone is placed on the narrow end of the V-shaped rails it rolls to the wide end. The double cone appears to be rolling uphill, but in reality the center of mass is moving down.
REFERENCES: (PIRA 1J11.50) Demonstration B1-6 is a larger version of this demonstration.
EQUIPMENT: Double cone on rails, as photographed.
SETUP TIME: None.
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