Question

Explain four methods by which friction between two solid surfaces in contact can be reduced.​

Answer 1

Answer:

Answer: The four methods by which friction between two solid surfaces in contact can be reduced are: By polishing – Polishing a rough surface smoothens it and reduces the friction. By lubrication – Lubricating the surface with oil, grease or graphite decreases the friction between two surfaces.

Answer 2

Answer:

Polishing, Lubrication, Use of ball bearings, Streamlining the surface

Explanation:

Friction can be reduced by

- applying lubricants on the surface

- polishing the surfaces

- using ball bearings or rolling-element

- streamlining the surface, this will reduce the area of contact between the      

 two surfaces