Acceleration measures how quickly an object changes its velocity over time. It can refer to either speeding up or slowing down, or changing direction.
Deceleration/Negative Acceleration: Deceleration occurs when an object slows down or decreases its speed over time.
Uniform Acceleration: Uniform acceleration refers to a constant rate of change in velocity over time.
Free Fall: Free fall is the motion of an object under the influence of gravity alone, with no other forces acting on it.