* Constant acceleration doesn't mean constant speed: Acceleration is the rate of change of velocity. A particle can have constant acceleration while its velocity changes.
* Acceleration can be negative: If the acceleration is in the opposite direction of the particle's velocity, it will slow the particle down. This is called deceleration.
* Coming to a stop: If the acceleration is negative and continues long enough, the particle's velocity will eventually reach zero, meaning it has stopped.
Example:
Imagine a car moving forward at 20 m/s. It then applies its brakes, producing a constant negative acceleration of -5 m/s². The car will slow down, eventually reaching a speed of 0 m/s and coming to a stop.
Key point: A particle with constant acceleration will eventually stop if the acceleration is in the opposite direction of its initial velocity and continues for a long enough time.
