Question

Friction between two surfaces can
not be decreased by
(a) polishing the surface
(b) using ball bearing
c) decreasing surface
d) none of above ​

Answer 1

Answer:

By polishing the surface, as polishing makes the surface smooth and friction can be reduced. Using lubricants such as oil or grease can reduce the friction between the surfaces. When objects are rolled over the surface, the friction between the rolled object and surface can be reduced by using ball bearings