Module 5 (Lesson 2)

Question 1

Kinetic friction

Answer 1

Exerted on one surface by another when the two surfaces rub against each other because one or both surfaces are moving

Question 2

Static friction

Answer 2

The force exerted on one surface by another when there is no motion between the two surfaces

Question 3

Coefficient of Kinetic Friction

Answer 3

The slope of the line on a graph of kinetic friction force vs normal force is called the coefficient of kinetic friction and relates the friction force to the normal force

Question 4

Coefficients of Static Friction

Answer 4

A dimensionless constant depending on the two surfaces in contact. It is used to calculate the maximum static frictional force the needs to be overcome before motion begins