Static Friction

The frictional force between two surfaces at rest relative to each other.

Sometimes referred to as stiction.

Examples
MaterialStatic frictionSliding friction
Brakes~0.30.3 - 0.7
Clutches0.3 - 0.40.3 - 0.7
Earth - Earth0.25 - 1.0 
Lignum vitae - Steel 0.1
Metal - Metal (dry)0.15 - 0.60.1 - 0.5
Nylon - Steel 0.3 - 0.5
Perspex - Steel~0.5 
PTFE - Steel 0.05 - 0.2
Rubber - Steel0.6 - 0.90.3 - 0.6
Rubber - Asphalt0.7 - 0.90.5 - 0.8
Wood - Wood0.25 - 0.50.25 - 0.5

See also: Friction, Stiction.

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Subjects: Classical Mechanics