Question

When we push a ball lying on the ground, it starts rolling. The force exerted has produced motion in the ball. However, when we try the same with a heavy stone, it does not move. Why? Is it because of friction?

Answer 1

This difference occurs due to inertia. A light weighting ball has less inertia and hence less force is required to move it whereas as a heavy weighing stone has much greater inertia hence more force is required to move it. If the force applied is less than what an object can withstand the object doesn't move.