Inertia and Mass
Inertia and Mass: Overview
This Topic covers sub-topics such as Inertia, SI Unit of Mass, Law of Inertia, Inertia of Motion, Inertia of Rest, Inertia of Direction and, Difference between Inertia and Mass
Important Questions on Inertia and Mass
How many types of inertia do the material bodies have?

If we are travelling in a bus and the driver takes a sharp turn to the left we tend to move to the right. Explain how we return back to our original position?

Which of the following is not an SI unit?

Why is the SI unit of mass kilogram not gram?


Name the three types of inertia and explain briefly with examples.

You fall in forward direction when a bus brakes to stop and backward direction when it accelerates forward.

Describe an activity to demonstrate inertia of rest.

Give reason why the luggage kept on roof of cars is tied with a rope.

State Newton's first law of motion.

On what property does inertia depend?

A child sets a rupee coin on a stiff card covering an empty glass tumbler. He gives the card a sharp horizontal flick with his finger. The card shoots away. What happens to the coin and why?

A passenger in a bus slips sidewards as the bus turns sharply. Why?

It is dangerous to jump out of a moving bus. Why?

Why do water droplets sprinkle out when a wet cloth is shaken/jerked?

A jerk is given to a piece of paper under a book. The book doesn't move. Why?


Three solid blocks of same size are made of steel, wood and plastic respectively. Which of these has the highest inertia and why?

There are three solids made up of aluminium, wood and plastic, of the same shape and same volume. Which of them would have the highest inertia?

Two balls of same size but different materials, rubber and iron are kept on smooth floor of a moving train. The breaks are applied to suddenly stop the train. Which ball rolls faster and why?
