Science Give the definition [1 M]

Static friction comes into play to counterbalance the applied force on the body.

When one surface is sliding over the other surface, sliding friction comes into play.

When one body rolls over the surface of another body, the resistance to its motion is called the rolling friction.

The substances which reduce friction are called lubricants.

Irregularities on two surfaces in contact may clasp with each other, increasing friction.

Friction is the form of force, which opposes the relative motion between the two surfaces in contact and it acts on both the surfaces.

Fluid exerts the force of friction on objects in motion through them.

The frictional force exerted by fluids is also called drag.

Ball bearings reduce friction. They are used between hubs and the axles of ceiling fans and bicycles.