On what factors does the limiting value of the force of static friction depend?
Answers
Given two surfaces, the limiting coefficient of static friction (also called the coefficient of static friction or static friction coefficient) between them, denoted or , is defined as the number such that the static friction between any two bodies with these two surfaces respectively as the surfaces of contact cannot exceed , where is thenormal force between the two bodies.
For a block resting on a table, the limiting coefficient of static friction between the lower surface of the block and the upper surface of the table is defined as the maximum possible ratio of an applied horizontal force to normal force for which the block does not slip against the table.
The notion of limiting coefficient of static friction arises as part of the Coulomb model of friction.
The angle defined as is termed the angle of friction.