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Q.

Is it true that the rolling friction is smaller than the sliding friction?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
Yes, the rolling friction is smaller than the sliding friction. Rolling friction is the force of friction created when one body rolls over the surface of another body, such as when a wheel rolls over a road. At the same time, sliding friction is the resistance created by any two objects when sliding against each other. As the area of contact is less in the case of rolling than in the case of sliding, rolling friction is less than sliding friction.
 
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