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Macroscopic Friction
The law of Leonardo (da Vinci)
The law of Euler and Amontons
The law of Coulomb
Historical abstract
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Mechanical adiabaticity
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Friction - a pinning problem
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The law of Coulomb

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A log of wood is sliding on a conveyer band. If we change the speed of the conveyer band friction remains the same.

This leads to the law of Coulomb:

Friction is independent on the velocity
 
  The law of Euler and Amontons                  Historical abstract

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