Table�4.2
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Approximate Values of the Coefficients of Friction for Various Surfaces
1
Materials
Coefficient of Static Friction,
Coefficient of Kinetic Friction,
Glass on glass (dry)
0.94
0.4
Ice on ice (clean,
)
0.1
0.02
Rubber on dry concrete
1.0
0.8
Rubber on wet concrete
0.7
0.5
Steel on ice
0.1
0.05
Steel on steel (dry hard steel)
0.78
0.42
Teflon on Teflon
0.04
0.04
Wood on wood
0.35
0.3
1
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The last column gives the coefficients of kinetic friction, a concept that will be discussed shortly.
Copyright � 2012 John Wiley & Sons, Inc. All rights reserved.
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