Friction

Definition

Friction is a force that opposes relative motion between two surfaces in contact. It arises due to microscopic irregularities between surfaces and can cause objects to slow down or come to rest.

Related terms

Static Friction:

Static friction is the type of friction that prevents two stationary surfaces from sliding past each other when a force is applied.

Kinetic Friction:

Kinetic friction occurs when two surfaces are already in motion relative to each other and experience resistance as they slide past each other.

Rolling Friction: Rolling friction is the type of friction that occurs when an object rolls over a surface, such as a ball rolling on the ground. It is generally lower than sliding friction.