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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
'The strength and weakness of physicists is that we believe in what we can measure. And if we can't measure it, then we say it probably doesn't exist. And that closes us off to an enormous amount of phenomena that we may not be able to measure because they only happened once. For example, the Big Bang. ... That's one reason why they scoffed at higher dimensions for so many years. Now we realize that there's no alternative... '
Michio Kaku (1947-) Top 100 Lists:Popular Products:
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