Friction

:This article is about the resistive force. For the Japanese rock band FRICTION, see Friction (band).

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

In physics, friction is the non-conservative resistive force that occurs when two surfaces travel along each other when forced together. It causes physical deformation and heat buildup.

Related Topics:
Physics - Conservative - Resistive force - Surface - Heat

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

The frictional force is a function of the force pressing the surfaces together and the coefficient of friction between the materials. In particular:

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

: F_f = F_pmu_f ,

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

where

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

:Ff is the force of friction

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

:Fp is the force perpendicular to the contact surface (usually called the normal force)

Related Topics:
Perpendicular - Normal force

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

:μf is the coefficient of friction.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~