Question

Explain frictional force

Answer 1

Answer:

Explanation:

frictional force is due to irregularities on the surface which opposes the motion of an object over another object in contact with it without friction we cannot even walk or in some cases we need to reduce friction Cosmos working of the system in the case of solid surfaces the force of friction is known as compared to two liquid surfaces lubricants are used to reduce friction

Answer 2

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]





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