Force of friction arises due to_____of the irregularities of the two surfaces in contact.

Force of friction is a

Force of static friction_____on the nature and condition of the two surfaces in contact.

Resonance arises due to the:

Surface tension mainly arise due to ____.

Force of_____friction does not depend on the -area of contact.

The force of friction is doubled. Then coefficient of friction mu

Lubricants are used to_____force of friction.

A 50 gm box is placed on an inclined plane making an angle of 30^@ with the horizontal so that a gentle tapping causes the sliding of the box. Calculate the coefficient of static friction for the surfaces of the box and the inclined plane in contact.