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Materials | Coeff. of Static Friction s | Coeff. of Kinetic Friction k |
Steel on Steel | 0.74 | 0.57 |
Aluminum on Steel | 0.61 | 0.47 |
Copper on Steel | 0.53 | 0.36 |
Rubber on Concrete | 1.0 | 0.8 |
Wood on Wood | 0.25 - 0.5 | 0.2 |
Glass on Glass | 0.94 | 0.4 |
Waxed wood on Wet snow | 0.14 | 0.1 |
Waxed wood on Dry snow | - | 0.04 |
Metal on Metal (lubricated) | 0.15 | 0.06 |
Ice on Ice | 0.1 | 0.03 |
Teflon on Teflon | 0.04 | 0.04 |
Synovial joints in humans | 0.01 | 0.003 |
Answered by: Ertan Salik, M.A. Physics, USC
'In a way science is a key to the gates of heaven, and the same key opens the gates of hell, and we do not have any instructions as to which is which gate.
Shall we throw away the key and never have a way to enter the gates of heaven? Or shall we struggle with the problem of which is the best way to use the key?'
Richard Feynman (1918-1988) Top 100 Lists:Popular Products:
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