A.Define force of friction.

1.	A.Define force of friction.
Answer» Frictionis theforceresisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types offriction: Dryfrictionis aforcethat opposes the relative lateral motion of two solid surfaces in contact. Thisforceis staticfriction force, which is theforceexerted on the surface by another when there is no motion between the two surfaces. Staticfriction forceacts in response to aforcetrying to cause a stationary object to start moving.

Answer»

Frictionis theforceresisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types offriction: Dryfrictionis aforcethat opposes the relative lateral motion of two solid surfaces in contact.

Thisforceis staticfriction force, which is theforceexerted on the surface by another when there is no motion between the two surfaces. Staticfriction forceacts in response to aforcetrying to cause a stationary object to start moving.

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