Give examples to show that friction is both a friend and a foe.
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Answer:
Friend and foe
Explanation:
yeah it's a friend, when you are riding a bike. the friction between the tyre and the road helps us from slippage and its it's a friend here...
Foe... In a heat engine or a machine which consist on rubbing two surfaces will surely induce friction and ensures power or energy loss.....
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