Coefficients of Friction

MaterialsCoeff. of Static Friction
Greek letter mus		Coeff. of Kinetic Friction
Greek letter muk
Steel on Steel0.740.57
Aluminum on Steel0.610.47
Copper on Steel0.530.36
Rubber on Concrete1.00.8
Wood on Wood0.25-0.50.2
Glass on Glass0.940.4
Waxed wood on Wet snow0.140.1
Waxed wood on Dry snow-0.04
Metal on Metal (lubricated)0.06
Ice on Ice0.10.03
Teflon on Teflon0.040.04
Synovial joints in humans0.010.003

Source: Serway Physics for Scientists and Engineers 4th edition (p. 126.)

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