what is friction?why is it a necessary evil?What is drag?
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Is is a general misconception that friction always opposes motion between two bodies in contact ,but actually it opposes relative motion between two bodies in contact .In many cases friction is found as the cause of motion .without friction it is impossible to imagine this world.Friction is evil in mechanical machines causing wear and tear of parts.Friction causes wear and tear of tyre but in turn is impossible to rotate tyre…and many more.
drag- pull (someone or something) along forcefully, roughly, or with difficulty.
drag- pull (someone or something) along forcefully, roughly, or with difficulty.
satyam104:
but in this means the frictional force produce by air
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it is a opposing force which comes into play when an object moves over the another
nice ans
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