Question

what are the ways to reduce friction

Answer 1

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.

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Answer 2

Answer:

by polishing the surface of materials

by applying lubricants between moving parts of machines

using ball bearings