(a) A stone of the same size as rubber ball has more mass. As mass is a measure of inertia, therefore, stone has more inertia than a rubber ball. (b) A trin has greater inertia than a bicycle, because trin is much heavier than a bicycle. (c ) A five-rupees coin is heavier than a one-rupee coin. Therefore, inertia, of five-ruppees coin is more than the inertia of one-rupee coin.
