* Acceleration is the rate of change of velocity. Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.
* Therefore, any change in either speed or direction results in a change in acceleration.
Examples:
* Car speeding up: If a car increases its speed, it's accelerating.
* Car slowing down: If a car decreases its speed, it's decelerating (which is still a type of acceleration, just in the opposite direction of motion).
* Car turning: Even if a car maintains a constant speed while turning, its direction changes, and therefore its acceleration changes.
Important Note: An object can have constant speed and still be accelerating if its direction changes (like the car turning example).
