Here's why:
* Velocity is the rate of change of position over time. It has both magnitude (speed) and direction.
* Acceleration is the rate of change of velocity over time. It also has both magnitude and direction.
Therefore, if velocity is changing, it means the object is accelerating.
Key Points:
* Constant Velocity: If an object is moving at a constant velocity, its acceleration is zero.
* Changing Velocity: If an object's velocity is increasing, it has positive acceleration. If its velocity is decreasing, it has negative acceleration (sometimes called deceleration).
* Instantaneous Acceleration: The acceleration at a specific instant in time is called instantaneous acceleration. This is often calculated using derivatives in calculus.
