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 how fast an object is moving and in what direction.
Think of it this way:
* Imagine a bowling ball at rest. It has a certain inertia due to its mass.
* Now, imagine you roll the bowling ball down a lane. It's moving, but its inertia remains the same. It still takes the same amount of force to stop it, regardless of its speed.
Key Point: Inertia is an intrinsic property of an object, while velocity is a dynamic property that can change.
While an object's *momentum* changes with its velocity (momentum = mass x velocity), inertia itself remains constant.