Question

Why friction is needed ??​

Answer 1

Answer:

friction is needed because friction helps us to walk, write, hold things, lift objects. ... without it many works cannot be done

hope it helps

Answer 2

⚔️Friction ⚔️

friction is the force acting between two surfaces in contact ,or the force of a medium acting on a moving object is the relative motion.

• friction always opposes the tendency of relative motion.

⏩cause of friction

modern view :

friction arises on account of strong atomic and molecular forces of attraction between two surfaces at a point of actual contact.

⏩ Advantages of friction

1. it is due to friction between the ground and the feet that we are able to walk.
2. the brakes of a vehicle cannot work without friction.
3. absence of friction agent not be possible to write on a paper with pen or pencil.
4. the tyres of vehicles are made rough to increase friction.

⏩disadvantages of friction

1. wear and tear of machinery is due to friction.
2. excessive friction between rotating parts of a machine produces enough heat and causes damage to the machinery.

friction has both advantages and disadvantages,

that's why friction is a necessary evil.

I hope it helps you ❤️

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