Game Development Reference
In-Depth Information
B
U SEFUL F RICTION
A PPENDIX
C OEFFICIENTS
FOR G AMES
materials used in games. Both static and dynamic values are given for com-
pleteness. If you are using only one friction coefficient, then you can average these, or
use the dynamic value for both.
Friction is discussed in chapter 15.
This appendix provides a table of useful static and dynamic friction values for
Static
Dynamic
Materials
Friction
Friction
Wooden crate on concrete
0 . 5
0 . 4
Wo o d e n c r a t e o n i c e
0 . 2
0 . 1
Glass on ice
0 . 1
0 . 03
Glass on glass
0 . 95
0 . 4
Metal on metal
0 . 6
0 . 4
Lubricated metal on metal
0 . 1
0 . 05
Rubber on concrete
1 . 0
0 . 8
We t r u b b e r o n c o n c r e t e
0 . 7
0 . 5
Performance tire on concrete
c.1 . 5
1 . 0
Velcro on velcro
6 . 0
4 . 0
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