Question

The frictional force depends up on
nature of two surface in contact​

Answer 1

Answer:

I'll give you the answer

Explanation:

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.

AND

The frictional force depends up on

nature of two surface in contact​ to each other.

HOPE IT HELPS YOU...

Answer 2

Answer:

Yeah, its true that frictional force depends on nature of two surfaces in contact.

When one surface is placed over another surface, humps of molecules press against each other and get interlocked. The pressure at points of contact are high and a type of cold welding takes place. When one surface slides over the other, the bonds between the molecules are continuously broken and re-build at other points. The force which is required to break these bonds is called as frictional force or force of friction.

Therefore, rougher the surfaces , more will be the force of friction. (Due to greater interlocking of the molecules.)

Hope it helps!