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Q.

Is it true that lubrication reduces friction?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
The friction produced between the surfaces is decreased by lubricating surfaces with oil, grease and graphite, etc. Lubricants fill the irregularities of the rough surface resulting in reduction of friction. In other words, Lubrication is done to minimize friction. Sometimes friction is undesirable as friction causes wear and tear of the object and hence lubrication of the parts in such cases is important.
 
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