It always resists the motion, so extra energy is required to overcome it It causes wear and tear of machines. It decreases the life expectancy of moving parts of vehicles. Since friction is very useful in some cases while harmful in some cases, friction is called a necessary evil. explain with example
Answers
Explanation:
friction results in the loss of energy and wear and Tear of the surfaces, for example rubbing of palms against each other generate heat due to friction similarly when moving parts of machines are together, a lot of heat is produced due to the friction between them this heat may damage the machine gradually does it it is called as an evil.
friction saves us from slipping on a smooth surface,the friction between the tyres of vehicles and the ground help vehicle to move without sleeping. Grooves in Tyres increase the friction and vehicle get a better grip on the road the brakes of any moving vehicle depend upon friction.
thus we see here that friction is necessary and also it is an evil
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It decreases the life expectancy of moving parts of vehicles. Since friction is very useful in some cases while harmful in some cases, friction is called a necessary evil. explain with example.
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