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Why friction is necessary evil ?

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Why friction is necessary evil ?

Posted by Khushi Tyagi Tyagi 7 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Ritik Dhakad 7 years, 4 months ago

Though friction is necessary to walk on road, write on board or in paper, etc. ,it produces heat which in turn causes wear and tear of objects. Thus, friction is a necessary evil

Yogita Ingle 7 years, 4 months ago

Friction is very important for us it helps in:,It allows us to walk comfortably, It allows us to grip and catch other objects. Things do not move from their places because of the friction. Speeds of moving objects can be controlled due to friction only. But apart from this friction is considered as an evil because; it causes wear and tear in objects of our daily use including machines. It makes movement of heavy objects very difficult.We need to spend a lot of time and money for the maintenance of various machines in order to keep their friction low.

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