Question

what is the cause of friction​

Answer 1

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.

Answer 2

Answer:

Friction is a caused due to the interlocking of irregularities between the two surfaces in contact.

e.g

-smooth surfaces-: have minute irregularities between the two surfaces.

-rough surfaces-: have larger irregularities between the two surfaces.

show force of friction is more if the surfaces are rough.

Explanation:

Hope it is helpful!!!