Here's why:
* Acceleration is a continuous process: Acceleration means a change in velocity over time. It doesn't have a distinct "start" or "end" point. An object is either accelerating (its velocity is changing) or not accelerating (its velocity is constant).
* The change itself is important: Instead of focusing on the "start" of acceleration, we often focus on what causes it. This is called force. A force applied to an object can cause it to accelerate.
So, instead of saying "an object starts to accelerate," you might say:
* "A force is applied to the object, causing it to accelerate."
* "The object's velocity is changing, meaning it is accelerating."
