On what factor does the inertia of a body depend? Which has more inertia, a cricket ball or a rubber ball of the same size?

Describe the term ‘inertia’ with respect to motion.

State Newton’s first law of motion. Give two examples to illustrate Newton’s first law of motion.

Why do the passengers in a bus tend to fall backward when it starts suddenly?

Explain why, a person travelling in a bus falls forward when the bus stops suddenly.