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