Positive acceleration speeds up an object, and negative acceleration slows it down.
Positive acceleration occurs when an object speeds up. This means that the rate of change of velocity is in the same direction as the velocity itself, leading to an increase in speed. Conversely, negative acceleration (deceleration) happens when an object is slowing down due to a change in velocity in the opposite direction from its motion.
https://brainly.com/question/12550364