Here's why:
* Inertia is a fundamental property of matter that measures its resistance to changes in motion. It depends solely on the object's mass.
* Velocity is a measure of an object's speed and direction. It describes how an object's position changes over time.
Think of it this way: Imagine a bowling ball and a tennis ball. The bowling ball has significantly more mass than the tennis ball, meaning it has greater inertia. If you push both objects with the same force, the bowling ball will be much harder to get moving (and to stop once it's moving).
Key takeaway: An object's inertia remains constant regardless of its velocity. Changing the object's velocity requires a force to overcome its inertia, but the inertia itself doesn't change.
