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there is limit beyond which polishing of surface increases rather than decreases frictional resistence,explain why?

there is limit beyond which polishing of surface increases rather than decreases frictional resistence,explain why?

Grade:12th pass

3 Answers

Kotapativenkata Sriramireddy
40 Points
8 years ago
friction arises due to molecular adhesion,more presicely due to electrostatic forces.The roughness of the surface plays a role when the bumps(hills and valleys) to lock the surfaces each other and avoid motion.but if the surfaces are further,the bumps become even and the area of contact increase,the surface molecules are able to come closer to each other,as a result the electrostatic forces(adhesion)between the atoms of the surface increases.
   RUB YOUR PALM ON A SMOOTH MIRROR SURFACE AND YOU WLII FEEL THE ADHESION
 
Stone Asad
13 Points
6 years ago
due to excessive polishing more molecules of the two surfaces comes closer thus they form more bonds and offer great resistance
Bhuvanesh
13 Points
4 years ago
Friction arises due to electrostatic forces but due to excessive polishing more molecules come closer and then form more bond and offer greater resistance

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