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Q.

Is it true that rollers are used in luggage trolleys?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
We know that rolling is easier than sliding or pushing, or lifting. “When an object is rolling, the frictional forces experienced by the object are called rolling friction.” The rolling friction is the least among all the frictions in magnitude. Therefore, it is very easy to overcome rolling friction. That is why rollers are used in luggage trolleys. When the luggage with rollers is pulled, we have to apply much less force even if the luggage is very heavy.
 
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