Laws of friction
There are three laws of friction, which describe how friction works between two objects in contact.
These laws are:
- The friction force is proportional to the normal force, meaning that the greater the force pressing the two objects together, the greater the friction force will be.
-
The friction force always acts in the opposite direction to the applied
force, opposing motion.
- The amount of friction between two objects depends on the roughness of their surfaces and the force pressing them together. The rougher the surfaces, the more friction there will be.