Coulomb's Third Law of Friction

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SUMMARY

Coulomb's Third Law of Friction states that sliding friction is independent of sliding speed. However, at very slow speeds, static friction can develop due to increased surface interaction, potentially leading to higher frictional forces as surfaces interlock. This law serves as an approximation and is valid only within specific velocity ranges for certain types of friction. Beyond these ranges, the law does not hold true.

PREREQUISITES
  • Understanding of basic physics concepts, particularly friction.
  • Familiarity with the definitions of static and kinetic friction.
  • Knowledge of the limitations of physical laws in varying conditions.
  • Basic grasp of surface interactions at the microscopic level.
NEXT STEPS
  • Research the limitations of Coulomb's Law in extreme conditions.
  • Explore the differences between static and kinetic friction in detail.
  • Study the effects of surface roughness on frictional forces.
  • Investigate other friction models applicable at varying speeds, such as the Stribeck curve.
USEFUL FOR

Physics students, engineers, and anyone interested in understanding the principles of friction and its applications in real-world scenarios.

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According to Coulomb's third law of friction, the sliding friction if independent of the sliding speed.
But if the sliding speed is very slow, wouldn't the sliding friction be more? The object's surface will get more time to interact with the surface of the floor and static friction can develop, since the surfaces will become interlocked because they will have more time.
Thanks! :)
 
Physics news on Phys.org
Coulomb's third law of friction is an approximation, useful in some velocity range for some types of friction. If the movement is too slow or too fast, the law is not valid any more.
 

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