Question

what causes friction​

Answer 1

Explanation:

The frictional force between two bodies depends mainly on three factors: (i) the adhesion between body surfaces (ii) roughness of the surface (iii) deformation of bodies.

Answer 2

Explanation:

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Friction is a force that resists the relative motion between two objects or materials. The causes of this resistive force are molecular adhesion, surface roughness, and deformations. Adhesion is the molecular force resulting when two materials are brought into close contact with each other.