Here's why:

* Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.

* Instantaneous velocity refers to the velocity of an object at a specific point in time. It's the velocity measured at that exact moment.

Think of it like this:

Imagine a car driving on a road. Its speed might change constantly as it accelerates, decelerates, or takes corners. To describe its motion precisely, you need to know its speed and direction at every single instant. That's where instantaneous velocity comes in.

Calculating instantaneous velocity:

You can calculate instantaneous velocity using calculus, specifically by finding the derivative of the object's position function with respect to time.

In simpler terms:

The instantaneous velocity is the slope of the line tangent to the object's position-time graph at that specific point in time.

Let me know if you'd like to learn more about calculating instantaneous velocity or have any other questions!