Class 5_friction - L7 Friction Word of the Day Tribology Tribology is the science and technology of interacting surfaces in relative motion In other

Class 5_friction - L7 Friction Word of the Day Tribology...

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L7: Friction
Word of the Day: Tribology Tribology is the science and technology of interacting surfaces in relative motion. In other words: Friction. Friction is encountered in almost every engineering design. Sometimes we want to increase friction (brakes, clutches, belts, tires) Sometimes we want to decrease friction (wheels, engines)
Da Vinci’s Tribometers Block P N f Static: f = -P W FBD Block Table Load P A friction force F opposes the applied force P
P f μsN Equilibrium Motion μkN P N f W FBD Block Table Load P μs = static friction coefficient μk = kinetic friction coefficient In equilibrium, f = P (no motion) Just before motion, friction forces is at its highest.

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