Question

What is friction ? On which factors does it depend? ​

Answer 1

Answer:

Friction depends partly on the smoothness of the contacting surfaces, a greater force being needed to move two surfaces past one another if they are rough than if they are smooth.

Answer 2

$\large{\bf{\red{\underline{\underline{Hey}}}}}$  

Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism.

Friction depends partly on the smoothness of the contacting surfaces, a greater force being needed to move two surfaces past one another if they are rough than if they are smooth