Unit 10 - Tribology

Question 1

Coulombs law of friction

Answer 1

Force = coefficient of static x reaction force

Question 2

What is friction force dependent and independent of?

Answer 2

independent of the surface area

dependent on the microscopic surface asperity contact

Question 3

What is wear

Answer 3

removal of material from the surface due to relative motion

the volume loss is measured using an equation relating load, sliding distance, 1/hardness and yield strength