PURPOSE: To illustrate stable, unstable, and neutral equilibrium.
DESCRIPTION: The cone resting on its base is in stable equilibrium. Balancing on its tip, the cone is in unstable equilibrium. Lying on its side, it is in neutral equilibrium.
REFERENCES: (PIRA 1J20.11)
EQUIPMENT: Small, hollow brass cone, as photographed.
SETUP TIME: None.
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