Physics Study Guide/Frictional coefficients

Approximate Coefficients of Friction

Material Kinetic Static
Rubber on concrete (dry) 0.68 0.90
Rubber on concrete (wet) 0.58 -.--
Rubber on asphalt (dry) 0.72 0.68
Rubber on asphalt (wet) 0.53 -.--
Rubber on ice 0.15 0.15
Waxed ski on snow 0.05 0.14
Wood on wood 0.30 0.42
Steel on steel 0.57 0.74
Copper on steel 0.36 0.53
Teflon on teflon 0.04 -.--
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