Web Results
fric·tion
[frik-shuhn]
NOUN
1.
surface resistance to relative motion, as of a body sliding or rolling.
2.
the rubbing of the surface of one body against that of another.
3.
dissension or conflict between persons, nations, etc., because of differing ideas, wishes, etc.
Source: Dictionary.com

en.wikipedia.org/wiki/Friction

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact. Dry friction is subdivided into static friction ("stiction") between ...

Until now in physics, you've probably been ignoring friction to make things simpler. Now, it's time to include this very real force and see what happens.

www.dictionary.com/browse/friction

Friction definition, surface resistance to relative motion, as of a body sliding or rolling. See more.

www.britannica.com/science/friction

Friction, force that resists the sliding or rolling of one solid object over another. Frictional forces, such as the traction needed to walk without slipping, may be beneficial; but they also present a great measure of opposition to motion. About 20 percent of the engine power of automobiles is consumed in overcoming frictional ...

www.physics4kids.com/files/motion_friction.html

Physics4Kids.com! This tutorial introduces the physics of friction. Other sections include modern physics, heat, electricity, magnetism, and light.

hyperphysics.phy-astr.gsu.edu/hbase/frict.html

Frictional resistance to the relative motion of two solid objects is usually proportional to the force which presses the surfaces together as well as the roughness of the surfaces. Since it is the force perpendicular or "normal" to the surfaces which affects the frictional resistance, this force is typically called the " normal force" and ...