The inertia of an object is measured by?

The inertia of an object is measured by its mass. Here are the steps to understand this:

1. Inertia is a property of matter that resists changes in its state of motion. This means that an object will stay at rest or keep moving at a constant velocity unless acted upon by an external force.

2. The amount of inertia an object has depends on its mass. Mass is a measure of the amount of matter in an object, usually measured in kilograms or grams.

3. Therefore, the more mass an object has, the more inertia it has. This means it will resist changes in its state of motion more.

4. For example, it's harder to push a heavy car than a light bicycle because the car has more mass and therefore more inertia.

5. So, the inertia of an object is measured by its mass.