PURPOSE: To demonstrate that the coefficient of static friction is greater than the coefficient of sliding friction, and to determine the coefficient of static friction.
DESCRIPTION: Position the block on the incline and slowly increase the angle until the block begins to slide down the incline. Because the coefficient of sliding friction is greater than the coefficient of static friction, after the block starts sliding it will continue to slide.
The coefficient of static friction is equal to the tangent of the angle at which the sliding commences.
SUGGESTIONS:
REFERENCES: (PIRA 1K20.35)
EQUIPMENT: Inclined plane with wood block, as photographed.
SETUP TIME: None.
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