Question

how a child can pull a heavy luggage fitted with rollers easily

Answer 1

When one body rolls over the surface of another body, the resistance imparted to its motion is referred to as rolling friction. Since the rolling reduces friction and requires less energy to roll than to slide a body it is thus convenient to pull the luggage fitted with rollers. Rolling friction is also very smaller than sliding friction.

Answer 2

Answer:

The friction acting when an object rolls over another object is called rolling friction. It is easier to pull a luggage fitted with rollers than to drag it. Rolling decreases the friction and makes movement of things easier. This is why luggages are fitted with rollers. Hopes it helps!

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