Equations
Kinetic friction
Dynamics · id kinetic_friction
f_k = \mu_k N
| Symbol | Quantity | Unit | Meaning | Usual range |
|---|---|---|---|---|
f | kinetic friction force | N | Friction on a sliding object | 0 to 1e+07 |
mu | coefficient of kinetic friction | dimensionless | Ratio of friction to normal force while sliding | 0.01 to 1.5 |
Fn | normal force | N | Force pressing the surfaces together | 0 to 1e+07 |
Assumptions
- Coefficient independent of speed and contact area
Valid when
- No extra conditions.
Found by
Questions with these words retrieve this equation: friction, kinetic friction, sliding, coefficient of friction, normal force, drag a box.
Source
OpenStax University Physics Volume 1, Chapter 6 (reference; entry written by the project). License: MIT. Entry confidence: 0.99.