What is the coefficient of friction of steel?
The coefficient of static friction for steel is around 0.6–0.15 and the coefficient of kinetic friction is around 0.09–0.6. The making of steel involves many processes and stages.
What is the coefficient of friction between plastic and steel?
Coefficient of Friction
| Materials | Static | Sliding |
|---|---|---|
| Dry | Greasy | |
| Leather on cast iron | — | 0.13 (n) |
| Laminated plastic on steel | — | 0.05 (f) |
| Fluted rubber bearing on steel | — | 0.05 (t) |
What is the coefficient of friction of plastic?
| Coefficient of friction for a range of material combinations | ||
|---|---|---|
| combination | Static | Dynamic |
| rubber-metal | 1 | 0.5 |
| plastic-metal | 0.25…0.4 | 0.1…0.3 |
| plastic-plastic | 0.3-0.4 | 0.2…0.4 |
What is the coefficient of friction of nylon?
The coefficient of friction of nylon is measured with increasing load over a wide range of sliding speeds. It is found that, at a comparatively high speed, the coefficient of friction reaches a maximum of 1.0-2.0.
What is the friction coefficient of granite?
Coefficients of Friction for Granite
| Material | a (m/s2) | µs |
|---|---|---|
| copper penny | 3.47 | 0.38 |
| paper | 4.59 | 0.53 |
| granite | 3.87 | 0.43 |
| aluminum | 3.75 | 0.41 |
Why friction is not dependent on surface area?
Friction is a contact force when two surfaces interact. Notice that both of these friction formulas only depend on the coefficient of friction and the normal force. It does not depend the area of contact; it doesn’t depend on the sliding speed.