Question

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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Answer 1

Answer:

4 wheels

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Answer 2

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.