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प्रश्न
Why is this so traveller’s bags have wheels?
उत्तर
A traveler's bag has wheels so that it can be dragged easily because of reduced friction between the ground and the wheel. Thus, the wheel, a simple machine, helps to decrease the effort to be applied to the load, which is a bag here.
संबंधित प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
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