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Q.

Is it true that friction produces wear and tear in machines?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is true.
Due to friction, wear and tear occur in the machine. As the machine is a combination of many moving components and many components are in contact with each other. And the object’s life span is also reduced by it. And also affect the shape and size of the object.
 
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