Question

what are the main factors on which friction depends ?

Answer 1

friction is a force that opposes relative motion
1.it depends on contact surface
2.area of contact
3.cohesion force bw contacts surfaces
4.reaction force

Answer 2

HEY BUDDY HERE IS YOUR ANSWER
☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺friction force depend on two factors -
1.The materials that are in contact.The two materials and the nature of their surfaces.
2.The force pushing two surfaces together.
Pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other .

Thanks☺

Hope it helps