Question

State any four methods of reduce friction.​

Answer 1

Answer:

Friction can be reduced by the following methods ⇒

• by making the surface smooth by polishing.

• by applying lubricants (like oil or grease) to the rubbing surface.

• by using wheels to move objects.

• by using ball bearing between the moving parts of machine.

Answer 2

Answer:

By using lubricants: friction increases as the roughness is surface increases..

polishing surface: it makes the surfaces even and hence refuses friction..

By using ball bearing: Rotating machine can be mounted on ball bearing ..

By streamlining: streamlining reduces the area of contact and thus reduce friction..