Question

how is friction caused

Answer 1

Friction is caused by the interlocking of rough surfaces

Answer 2

Hey mate here is your answer》》

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.

Hope this answer will help you..《《