Case Study Frictional Forces

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1.1 Historical Development
Famous people who studied frictional forces
Leonardo da Vinci (1452-1519)
He studied objects to discover what affected their ability to move on surfaces. He never published his theories therefore has never received credit for his findings.
Guillaume Amontons (1663-1705)
He studied friction to discover that friction was the affect two surfaces had on each other.
Charles August Coulomb (1736-1806)
He continued Amontons studies to add to the second law of friction.
F. Philip Bowden and David Tabor
They investigated friction to discover that friction is related to the true area of contact surface.
1.2 Scientific Ideas
Scientists see friction as being divided into five different sub groups: dry friction, fluid friction, lubricated friction, skin friction and internal friction. There are three laws developed from scientific study: Amontons' First Law: The force of friction is directly proportional to the applied load, Amontons' Second Law: The force of friction is independent of the apparent area of contact, Coulomb's Law of Friction: Kinetic friction is indepen...

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