Question

wahat is friction?what are it advantages and disadvantages?

Answer 1

Friction is the rubbing together of two to create heat
Advantage
1.Without friction cars will nt be able to move because of the tryes
2.it will be impossible to walk or stop working after getting started
3.it also allows brakes to stop cars
Disadvantages
1.leads to wear and tear
2.it causes heat of engines

Answer 2

A natural force that always act opposite to the direction of motion is called friction.
Friction is the force which opposes the relative motion of the two body in contact .
advantages of friction -
 ADVANTAGES OF FRICTION
Friction plays a vital role in our daily life. Without friction we are handicap.
1. It is becomes difficult to walk on a slippery road due to low friction. When we move on ice, it     becomes difficult to walk due to low friction of ice.
2. We can not fix nail in the wood or wall if there is no friction. It is friction which holds the nail.
3. A horse can not pull a cart unless friction furnishes him a secure Foothold.
disadvantages of friction-

ADVANTAGES OF FRICTION
Friction plays a vital role in our daily life. Without friction we are handicap.
1. It is becomes difficult to walk on a slippery road due to low friction. When we move on ice, it     becomes difficult to walk due to low friction of ice.
2. We can not fix nail in the wood or wall if there is no friction. It is friction which holds the nail.
3. A horse can not pull a cart unless friction furnishes him a secure Foothold.
DISADVANTAGES OF FRICTION 
Despite the fact that the friction is very important in our daily life, it also has some disadvantages like:
1. The main disadvantage of friction is that it produces heat in various parts of machines. In this way     some useful energy is wasted as heat energy.
2. Due to friction we have to exert more power in machines.
3. It opposes the motion. 
4. Due to friction, noise is also produced in machines.
5. Due to friction, engines of automobiles consume more fuel which is a money loss. 
HOPE IT HELPS YOU.