what is the definition of friction
Answers
Explanation:
A force on objects or substances in contact with each other that resists motion of the objects or substances relative to each other. ... It is measured as the maximum force the bodies will sustain before motion occurs.
Answer:
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.[2] 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 non-moving surfaces, and kinetic friction between moving surfaces. With the exception of atomic or molecular friction, dry friction generally arises from the interaction of surface features, known as asperities
Fluid friction describes the friction between layers of a viscous fluid that are moving relative to each other.[3][4]
Lubricated friction is a case of fluid friction where a lubricant fluid separates two solid surfaces.[5][6][7]
Skin friction is a component of drag, the force resisting the motion of a fluid across the surface of a body.
Internal friction is the force resisting motion between the elements making up a solid material while it undergoes deformation.[4]