Introduction
Tomlinson Movie
Macroscopic Friction
The law of Leonardo (da Vinci)
The law of Euler and Amontons
The law of Coulomb
Historical abstract
Asperities
Adhesion models
Friction Force Microscopy
Principle of measuring
Measuring Topology
Measuring Friction
Both Channels
Calibration
Dissipation
Self assessment
Tomlinson's mechanism
Phenomenology I
Phenomenology II
Mechanical adiabaticity
Distinguish positions
Playing Tomlinson
Friction - a pinning problem
2D Friction
Critical Curves
Historical Background
Research Projects
Simulator Applet
The first Picture
The Panels
Parameters
Post processing
Statistics
Glossary
Textbook
 

The law of Leonardo (da Vinci)

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A log of wood is sliding on a conveyer band at a constant speed. The log can be turned on one of its smaller sides. The friction force remains the same.

This leads to the law of Leonardo (da Vinci):

Friction is independent on the area of contact
 
  This is the start of the trail               The law of Euler and Amontons

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