Theories of Friction

Friction is the resistance encountered when one surface slides over another. There are two main theories explaining it: the microscopic theory and the macroscopic theory. The microscopic theory focuses on the interactions at the atomic level, where surface roughness and molecular adhesive forces play key roles. The macroscopic theory looks at visible factors, such as weight and surface texture. Overall, friction depends on the materials involved and the force pressing them together, resulting in static friction (preventing motion) and kinetic friction (resisting motion). Understanding these theories helps in applications like improving vehicle tires or creating better lubricants.