Static Friction: Factors & Magnitude Limits

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Discussion Overview

The discussion revolves around the factors influencing the magnitude limit of static friction between two objects, including the coefficient of friction and its dependencies. Participants explore theoretical aspects and seek clarification on related concepts, such as the difference between static and kinetic friction.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant inquires about the factors that determine the limit of static friction between two objects.
  • Another participant suggests that the normal force and the coefficient of friction are key factors.
  • A question is raised regarding what the coefficient of friction depends on, with a mention of surface smoothness or roughness.
  • There is a request for an explanation of why the coefficient of static friction is larger than that of kinetic friction, specifically in the context of a block on an inclined plane.
  • One participant asserts that the coefficient of friction depends on the properties of the two materials involved, but challenges the relevance of surface smoothness or roughness.
  • A caveat is introduced regarding the phenomenon of cold welding, which may affect frictional behavior.
  • A repeated request for clarification on the difference between static and kinetic friction is noted, along with a link to an external resource.

Areas of Agreement / Disagreement

Participants express differing views on the factors influencing the coefficient of friction, particularly regarding the significance of surface characteristics. The discussion on the reasons for the difference between static and kinetic friction remains unresolved, with multiple perspectives presented.

Contextual Notes

Some assumptions about the nature of surfaces and material properties are not fully explored, and the implications of cold welding on friction are mentioned but not elaborated upon.

AFG34
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I'm curious as to what does the limit of the magnitude of static friction depends on between any two objects.
 
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what does the coefficient of friction depend on?
-how smooth or rough the surface of the objects are?
 
also, why is the coefficient of static friction larger than kinetic? Can someone explain this to me with reference to a block on an inclined plane. Thnx
 
AFG34 said:
what does the coefficient of friction depend on?

The two material's properties.


AFG34 said:
-how smooth or rough the surface of the objects are?

No.

Caveat: Cold welds.
 
Last edited:
thnx :D
 

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