Fewpal
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Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?

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Inertia is the measure of the mass of the body. The greater is the mass of the body; the greater is its inertia and vice-versa. 

(a) Mass of a stone is more than the mass of a rubber ball for the same size. Hence, inertia of the stone is greater than that of a rubber ball. 

(b) Mass of a train is more than the mass of a bicycle. Hence, inertia of the train is greater than that of the bicycle. 

(c) Mass of a five rupee coin is more than that of a one-rupee coin. Hence, inertia of the five rupee coin is greater than that of the one-rupee coin.

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