Rolling resistance

Rolling resistance, also called rolling friction or rolling drag, is the force that resists motion when a body such as a ball, tire, or wheel rolls on a surface. It mainly results from non-elastic effects, including hysteresis losses and permanent deformation of the object or surface. It is often expressed as a coefficient multiplied by the normal force, and is generally much smaller than sliding friction.

Also called

Rolling friction or rolling drag

Main causes

Non-elastic effects, including hysteresis and permanent deformation

Common expression

Coefficient times the normal force