Why frictional force gets increased when two surfaces in contact are polished beyond a certain limit ?

TRUE/FALSE TYPE QUESTIONS: Frictional force gets increased when a surface is polished beyond a certain limit.

Which force gets reduced when the two surface in contact are polished to make them smooth ?

Frictional force increases when surfaces in contact are made very very smooth. This is because

(A) : Polishing a surface beyond a certain limit increases rather than decreases the frictional forces . (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 .

Friction depends on the _____ of two surfaces in contact.

Friction depends on the _______ of two surface in contact.

Name the force which increases when the two surface in contact are made more rough.

Why does friction increase if the two surfaces are pressed ?

Maximum static friction force depend on area of surfaces in contact.