Is friction dependent on surface area?

The force due to friction is generally independent of the contact area between the two surfaces. Note that this relationship breaks down when the surface area gets too small, since then the coefficient of friction increases because the object may begin to dig into the surface.Click to see full answer. Keeping this in consideration, why friction is not dependent on surface area?There actually are simple Originally Answered: Why does friction not depend upon area of contact? Now, this decrease in pressure due to the force cancels out the increase in the frictional force thus developed on increasing the area. Hence the frictional force becomes independent of area of contact surface.One may also ask, how does friction depend on the smoothness of the surface? Friction depends on the smoothness of the surfaces in contact. The force of friction depends on the nature of the surfaces in contact. The force of friction increases if the surfaces are pressed harder. Frictional force that comes into action before the start of the motion of an object is called static friction. Keeping this in consideration, is friction dependent on weight? Friction DOES NOT depend on the mass of the body. It depends on the normal force and the roughness of the surface in contact. When a body is placed on the ground, the mass of the body (weight= mass*acceleration due to gravity) comes into play for the normal force from the ground.Why do we say friction is independent of area of contact?it is because of those tiny hills that friction is possible. When the small side is in contact, there are fewer ‘hills’ but the area of each one is larger due to the higher pressure (same force, smaller area), so there will be no difference in the amount of friction. Hence friction is independent of area of contact.