Origin of Friction: Atomic/Sub-Atomic Scale

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The origin of friction at the atomic and sub-atomic scale involves complex interactions between surfaces, with different mechanisms for static and kinetic friction. Tomlinson's model is referenced as a specific example of how these interactions can be understood. The discussion emphasizes the need for clarity in questions about friction, as various models exist for different types of friction, such as solid-liquid and liquid-liquid. Participants suggest that further research is necessary to formulate more precise inquiries. Understanding these nuances is crucial for grasping the fundamental principles of friction.
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What is the origin of friction on the atomic (sub-atomic) scale?
 
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I am just asking what causes friction?
 
Chemist@ said:
What is the origin of friction on the atomic (sub-atomic) scale?
Do you mean:

"Why is the frictional force opposite in direction to the direction of travel?"
 
Here's the Tomlinson's model on the orgin of friction:

http://www.reibungsphysik.tu-berlin.de/fileadmin/fg204/Publikationen/Tomlinson.pdf

Please note that this is a very specific example. Your question is actually rather vague, because not only are there different proposed mechanisms for static and kinetic friction, but there are also different models for solid-liquid friction, liquid-liquid friction, etc. It is why Nugatory suggested that you do a bit of homework on your own first and figure out exactly how to ask your question in a more informed manner.

Zz.
 

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