Values from General
Physics, by D. C. Giancoli, © 1984
These values are approximate and should be used
only as a guide. |
||
Surfaces |
ms |
mk |
Wood on wood |
0.40 |
0.20 |
Wood (waxed) on
wet snow |
0.14 |
0.10 |
Ice on ice |
0.10 |
0.03 |
Lubricated metal
on metal |
0.15 |
0.07 |
Unlubricated steel
on steel |
0.6 |
0.3 |
Rubber on solids |
1 - 4 |
1 |
Lubricated ball
bearings |
< 0.01 |
< 0.01 |
Synovial joints in
human limbs |
0.01 |
0.01 |