Statics › Section I · Friction › Topic I.1
Dry friction
Until now, most contacts in this course have been treated as smooth. Real surfaces grip, and that grip decides whether a crate stays put, a wedge holds or a belt slips, so this topic builds the friction model that the rest of the section depends on.
In this topic
- Friction in statics
- The Coulomb model
- Static friction has a ceiling
- Kinetic friction and constant velocity
- Friction angle and friction resultant
- Where the normal force acts
- Three kinds of problem
- Worked example: does the crate move?
- Worked example: a crate on a ramp
- Common mistakes to avoid
- Key takeaways
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