Qstnid -A-11-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. Explain. - 06: Friction

with Solutions -

#11
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. Explain.
Ans : The coefficient of friction increases between two highly smooth surfaces because the atoms of both the materials come very closer to each and the number of bonds between them increase.