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 rupee coin and a one-rupee coin.

Explanation

Mass is a measure of the inertia of an object. If an object has more mass, it has more inertia.
(a) Astone has more inertia (than a rubber ball of the same size) because it has more mass tharn a rubber ball of the same size.
(b) A train has more inertia (than a bicycle) because it has more mass than a bicycle.
(c) A five-rupee coin has more inertia (than a one-rupee coin) because it has more mass than a one rupee coin