Question

give two methods of reducing friction .​

Answer 1

Methods of reducing friction:-

• 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.

Hope it helps :)

Answer 2

Answer:

It is commonly known that

friction is caused by roughness of the surfaces in contact. For this reason deliberate

attempts are made to make the surfaces rough or smooth depending upon the

requirement.

Friction opposes the motion of objects, causes wear and tear and is responsible

for loss of mechanical energy. But then, it is only due to friction that we are able

to walk, drive vehicles and stop moving vehicles. Friction thus plays a dual role in

our lives. It is therefore said that friction is a necessary evil.