Friction Test -...

If we apply oil on door hinges, the friction will:

The opposing force that is caused due to relative motion between two surfaces in contact is called ....................... .

When a boy tries to push a heavy box placed on a rough surface, the box does not move because of an opposing force called :

Which of the following is used to reduce friction in a rotating machine?

In which of the following cases more friction is desirable?

Which of the following material is likely to have least friction?

A coin flicked across a table will stop, because:

Powder is used in carrom board for:

The surface of a table is smoother as compared to that of a road. This is due to:

Any substance which is used to reduce the roughness of a surface is called a: