Here's why:
* Inertia is the tendency of an object to resist changes in its motion. It's a fundamental property of matter, related to its mass.
* Speed is a measure of how fast an object is moving.
Think of it this way:
Imagine a bowling ball sitting still. It has a certain inertia based on its mass. Now, imagine rolling the bowling ball at a certain speed. Does the ball suddenly become harder to stop? No, it still has the same inertia, even though it's moving.
If you double the speed, the ball will be harder to stop because it has more *momentum* (which is mass times velocity), but its inertia remains the same.
In short:
* Inertia: Dependent on mass, a property of the object itself.
* Speed: A measure of motion, not a property of the object.
Therefore, changing speed doesn't change the inherent inertia of an object.
