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Q.

Is it true that heat is generated in the machine due to excess friction?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
Friction is generated when two surfaces rub each other. Now, on rubbing, the surfaces may produce heat which is often referred to as heat produced by friction. Also, the heat produced should be reduced as it may cause wear and tear in some cases and it can also produce fire in extreme cases.
 
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