Inertia is an important idea in Newton's First Law of Motion. It tells us that an object will stay still or keep moving at the same speed unless something from the outside pushes or pulls it.

Key Points:

• What is Inertia?
  Inertia is when an object doesn't want to change how it's moving.

• Some Easy Examples:

  • A soccer ball won’t roll until someone kicks it. It stays still.
  • A book sliding on a table will eventually stop because of friction, which shows how inertia works.

Picture This:

Think about driving a car. If you suddenly stop, your body leans forward. That’s inertia making your body want to keep moving.

This is why using seatbelts is so important! They help keep you safe by stopping your body from moving forward.