Question

do you agree with the statement."friction is both good and evil."explain with examples

Answer 1

hey there ,

Friction plays an important role in our daily life.
lt is acting all the time around you. It helps you in many ways :-

ADVANTAGES OF FRICTION :-

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★ Friction helps us in walking and running. when we walk, there is friction between our foot ( or the sole of our shoe ) and the ground.
This prevents you from slipping .
on the other hand, If you try to walk on a wet floor on a wet floor , you tend to slip because the water reduces the friction between your foot . 

similarly , if you step on a banana peel , you will slip because the banana peel is smooth and reduces friction.

★ Friction helps us in writting and making drawings. If there were no friction, we would not be able to hold a pen vertically. It is friction that opposes slipping and helps us to hold the pen. also there is friction between our pen and the paper which prevents the pen from slipping on the paper.

It is the force of friction between our chalk and blackboard which enables your teacher to write on the blackboard.

★ Tyres of vehicles are made with special kinds of grooves so that they can move properly on road. These grooves help to have considereable friction and good grip between the tyres and the road.

similarly, when a tyre gets old , it's surface becomes smooth . vehicles with worn out tyres stop after covering a much longer distance ( when brakes are applied ) and hence, there is a greater risk of accident.

★ Friction produces heat. A matchstick lights up due to the friction against the side of matchbox when we strike it, This can destroy houses when catches fire.

★ The shoes of athletes are provided with spikes so as to increase friction and prevent slipping.

★ The force of friction helps to hold the nails and screws on the walls and in the wood.

★ wood can be cut because there is friction between the axe and the wood.

★ Friction helps us to open the lid of the bottle or the top of a pen, if your hands are oily or if you apply powder to your hands then , you will not be able to open, your hands will slip.

DISADVANTAGES OF FRICTION :-

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★ Tyres of vehicles wear out due to constant use. because of continuous friction between tyres and roads the grooves of tyres disappear and tyres become smooth. this may cause serious accidents.

★ the friction between branches of tress which rub against each other, forest fire occur.

★ friction produces heat, the engines of cars and other machinery , therefore, becomes very hot after running for sometime.

★ due to friction of pencil , chalk while writting they gets smaller and smaller.
similarly, continuous use of eraser makes it smaller.

★ Friction reduces the speed of moving vehicles to a great extent.

★ you have might seen while white washing the houses, the painter uses sand paper , this sand paper is worn-out and becomes smooth due to its repeated use.

★ In factories, specially you have seen where machines are used all the time, parts of machines rub against each other becomes hot and wear out quickly.

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HOPES THIS INFORMATION CLEARS YOUR DOUBTS !!!!!!!

BEST OF LUCK ;-)

#akashmandal.

Answer 2

Friction is part and parcel of our life.We need friction at each and every point of our life.
The fact that I am able to type this answer is due to friction between my fingers and keys!

But like everything has both good and bad sides, even friction has a dark side.

How friction is useful ?

>> You won't be able to sit without friction.Whenever you will try to sit you would skid down the surface.
>> Walking and running - You are able to walk or run due to friction between your feet/shoes and the ground.
>> Friction between the wheels and the ground helps the vehicles move.Without friction the vehicle would be just spinning on the wheels.
>> You are able to life things.Without friction, bags, notebooks would be just slipping through your fingers.
>> You are able to jot down things on paper due to friction between pen nib and paper.
>> All buildings are in one place due to friction only.Or else buildings would be tumbling down!
>> You are able to turn a page of the book due to this amazing friction only!
>> All kind of sports are based on friction.Be it be basketball or cricket or football, a game wouldn't be possible without friction.

You can't imagine a world without friction,but let's turn to the devil side of the friction.

Why sometimes friction is considered a nightmare?

>> The best example is the wear and tear of machines.Huge amount of money is invested to repair those machines.Not a good side of our hero friction!
>> All kinds of footwear gets worn out due to excess friction between it and ground.
>> Friction makes us bleed.It is due to friction that when we fall down we injure ourselves.Without friction we would simply slip on the surface.
>> When you try to move a heavy object a lot of energy is wasted to overcome both friction of the ground and also the air drag.
>> Friction generated heat.Its good but this heat energy is wasted , it just goes into the surrounding environment.

At end we can conclude that though friction causes troubles we can't avoid friction altogether as it is needed at all aspects of our daily chores.
So turn a blind eye to the darker side and see the brighter side of friction!

Hope This Helps You!