Does polishing increase friction?

Friction on a surface is caused due to the irregularities on that surface. By polishing a surface, these irregularities get evened out and the friction of that surface decreases. But if we polish that surface beyond a certain limit then friction of the surface increases.

What happens to the frictional force when a surface is heavily polished?

Answer: Friction decreases with smoothness only to a certain degree. When the surfaces are further polished, the Vander Waal forces and electrostatic forces between the atoms of the surfaces increases, this happens because the surfaces come closer when polished.

When 2 surfaces are polished the friction coefficient?

When two surface are polished, the friction coefficient between them decreases. But the friction coefficient increases and becomes very large if the surfaces are made highly smooth.

How does polishing a surface reduce friction?

Polishing a rough surface makes it smooth, and hence it reduces friction.

Will the friction of a surface decrease or increase if polished to a greater extent?

(R) : When the surface is polished beyond a certain limit , the molecules exert strong attractive force . This is called surface adhesion , to overcome which additional force is required . Hence frictional force increases .

When two surfaces are pressed harder friction increases explain why?

Answer: Friction between two surfaces increases when they are pressed harder because there are irregularities between two surfaces which tries to lock the two surfaces. When two surfaces are rubbed harder then irregularities get more time to increase their contact which in turn lead to increased friction.

Can friction be reduced to zero by making the surfaces highly polished and extremely smooth?

Question 3: Can we reduce friction to zero? Answer: Friction can be reduced to a great extent by polishing surfaces or by using a large amount of lubricants such as oil, water, or grease but we cannot reduce friction to zero.

When two surfaces are polished the friction coefficient between them decreases but?

But the friction coefficient increases and become very large. When two surfaces are polished, the friction coefficient between them decreases. But the friction coefficient increases and become very large if the surfaces are made highly smooth.

When two surfaces are polished the friction coefficient between them decreases but the friction coefficient?

When Two Surfaces Are Polished, the Friction Coefficient Between Them Decreases. but the Friction Coefficient Increases and Becomes Very Large If the Surfaces Are Made Highly Smooth.

What factors affect the force of friction between two surfaces?

The frictional force between two bodies depends mainly on three factors: (I) the adhesion between body surfaces (ii) roughness of the surface (iii) deformation of bodies.

How do textures of object affect the friction produce when two objects are in contact with each other?

Surface Texture and Friction Making a surface rougher or smoother may not always affect the sliding friction. In addition to this, for certain textures and materials, making a surface smoother reduces friction.

How does polishing reduce the friction between two surfaces?

If the surfaces that are in contact are rough, there is more friction. Hence to reduce friction, the surfaces in contact are kept smooth and polished. It is worth noting that if the two surfaces in contact are of the same metal, the friction increases on polishing the two surfaces.

What happens when two smooth surfaces come in contact with each other?

Chemically, when two super smooth surfaces comes in contact with each other, their chemical structures disturbs. Then their outer surface shells get merged into one another so they oppose relative motion, hence friction increases.

Why do roughened surfaces have higher contact points?

If you roughen up, one or more of the surfaces, contact will only take place at high spots, i.e. there will be a lot of gaps where there is no contact, so the area in contact is much lower. Conversely the forces/stresses on the much smaller area that is in contact will be higher. There is chemical reason behind it.

What causes friction between two rough surfaces?

If the surfaces are rough there are far fewer molecules that are close but the rough surface against another rough surface causes friction as in two bricks rubbing against eachother. You can try this with two polished surfaces of metal or glass.