Physics Friction Part 8 (Friction is a necessary evil) Class 8 VIII
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Explain that ` Friction is a necessary evil`.? | Yahoo Answers
What is meant by the phrase friction is a necessary evil?
Every school-going kid is taught that friction is a necessary evil. There’s another necessary evil hiding in plain sight that they aren’t taught about: the law of conservation of energy. Sure, violating this law would lead to catastrophic ergonomic consequences in this universe, but it’s also the law standing in the way of perpetual motion machines.
Free Essays on Friction Is a Necessary Evil through
The energy that is wasted for friction mainly appears as heat energy. Not only that energy is converted to heat due to friction, but also the parts of an engine may be overheated. As a result of friction, the soles of your shoes wear and tear out. So to make the life and works easier we need friction but excess friction is the cause of many losses too. Therefore to produce the necessary friction, we have to control it. Sometimes we need to increase or decrease friction by some processes. Therefore, we cannot discard friction totally; also friction is beneficial to us in many cases. For this reason friction is called a necessary evil.