Friction and viscosity
Coefficient of friction
| |
Static |
|
Kinetic |
| Aluminium on steel |
0.61 |
|
0.47 |
| Brass on steel |
0.51 |
|
0.44 |
| Car tyres on asphalt |
|
|
0.72 |
| Car tyres on ice |
0.51 |
|
0.15 |
| Car tyres on cement |
|
|
0.9 |
| Car tyres on wet asphalt |
|
|
0.45-0.70 |
| Car tyres on ice |
0.51 |
|
0.15 |
| Car tyres on grass |
|
|
0.35 |
| Copper on steel |
0.53 |
|
0.36 |
| Copper on glass |
0.68 |
|
0.53 |
| Copper on cast iron |
|
|
0.29 |
| Glass on glass |
0.94 |
|
0.4 |
| Lubricated bone joint |
0.001 |
|
0.003 |
| Rubber on concrete |
0.98 |
|
0.8 |
| Steel on air |
0.001 |
|
0.001 |
| Steel on ice |
0.03 |
|
|
| Steel on steel |
0.74 |
|
0.57 |
| Teflon on teflon |
0.04 |
|
0.04 |
| Teflon on steel |
0.04 |
|
0.04 |
| Tendon and sheath |
0.013 |
|
|
| Wood on wood |
0.3 |
|
|
| Waxed wood on dry snow |
0.51 |
|
0.04 |
| Zinc on cast iron |
0.85 |
|
0.21 |
Coefficient of viscosity (at 293K)
| |
|
Pas |
Air |
|
1.8x10-5 |
| Blood |
|
3-4x10-3 |
Castor oil |
|
2.42 |
| Glycerol |
|
8.3x10-1 |
Golden syrup |
|
100 |
| Mercury |
|
1.5x10-3 |
Pitch (273 K) |
|
5x1010 |
| Pitch (373 K) |
|
100 |
| Water |
|
1x10-3 |
