Question

what is friction? explain.

Answer 1

Friction is the resistance to motion of one object moving relative to another.
Without friction,we can't do many things in our life.Because of friction, we are able to write with pen,stop a car,walk,jump,run,fix nail for wall,etc.So,friction is very important in our life.Friction is more on rough surface whereas it is less on smooth surface.

hope it helps....

Answer 2

Friction is the force acting along the two surfaces in contact which opposes the motion of one body over the another.

Friction is the force that slows down things down or keeps them from moving.

Friction is always in the direction opposite to the direction of motion.

The main cause of friction is the presence of irregularities ( unevenness ) on the two surfaces in contact.

smoothness of the surfaces is the main factors on which the friction depends.

There are three types of frictions :-

★ static friction :- The force of friction in static ( stationary ) situation is called static friction.

★ sliding friction ;- The force of friction acting between the two surfaces when one of them just slides over the another with uniform speed.

★ Rolling friction :- The friction experienced by a body when it is made to move over other bodies like roller or wheel is called rolling friction.

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#akashmandal.