Question

What causes friction​

Answer 1

Answer:

Any resistance to motion of one object moving relative to another can cause friction. It is not a fundamental force, like gravity or electromagnetism.

Explanation:

The primary causes of friction are surface roughness, the plowing effect and molecular adhesion. Surface roughness is when serious abrasion occurs due to the roughness of the materials in contact. The plowing effect involves deformations of the objects that cause resistance to movement when the materials are relatively soft.

Answer 2

Explanation:

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.