Inertia doesn't have an "answer" in the way a math problem does. It's a fundamental property of matter.

Here's how to understand it:

Inertia is the tendency of an object to resist changes in its motion.

This means:

* An object at rest wants to stay at rest. It takes force to get it moving.

* An object in motion wants to stay in motion. It takes force to slow it down or change its direction.

Think of these examples:

* A car suddenly stopping: Your body continues moving forward due to inertia.

* A ball rolling on a flat surface: It will keep rolling unless friction slows it down.

* A spinning top: It continues spinning due to inertia.

Key point: The more mass an object has, the more inertia it has. This means it's harder to change its motion.

Let me know if you'd like a specific example or want to delve deeper into any aspect of inertia!