* Velocity is instantaneous: Velocity tells you the speed and direction of an object *at a specific moment in time*. It doesn't tell you anything about what happened before or after that moment.
* Zero velocity doesn't mean no movement: An object can have zero velocity at a particular instant and still be moving. Think of a ball thrown straight up in the air. At its highest point, its velocity is zero for a split second, but it's still moving, and will soon fall back down.
What you need to know:
To determine if an object has moved, you need more information than just its velocity at a single point in time. You need to know:
* The object's initial position: Where was the object before the moment you measured its velocity?
* The object's velocity over time: Has the velocity changed? If so, this indicates movement.
Example:
Imagine you are looking at a car that is currently stationary (velocity = 0). However, you have no information about where it was before. It could have:
* Been parked there all along.
* Just arrived and stopped.
* Been moving and just stopped at this moment.
Conclusion:
Velocity alone is not enough to determine if an object has moved. You need additional information about the object's position and velocity over time.
