Question

7. Friction is reduced by making the surface​

Answer 1

Explanation:

• 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.

Answer 2

Answer:

by making the surface lubricant, we can also greese the surface by oil.