When we walk , we push the ground backwards with one foot . According to Newton ’ s Third law , there is an equal and opposite force exerted by the ground . This force is exerted on a comparatively smaller mass i . e . our foot . So , acceleration is increases . Hence the other foot gets accelerated .
If there is no friction , we will slip and can ’ t walk .
o
Friction helps in movement of automobiles
Friction is a bane because of its disadvantages : o
o o
A good amount of useful energy is wasted as heat in various machine parts
Noise produced in machines Engines of automobiles consume more fuel
Methods to reduce Friction : o
Use of Lubricants o o
Use of Grease Use of Ball bearing