While going on a trip with parents, you pack belongings in big suitcases . these have either 2 or 4 wheels. how many wheels are preferable? why?
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1
Answer:
4 wheels
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5
Answer:
4 wheeled suitcases are preferable because more the number of wheels, more the rolling friction and therefore it is easier to carry the suitcases to the trip.
Note: Rolling friction is lesser than sliding friction.
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