Constant acceleration is a type of motion in which an object's velocity increases or decreases by the same amount in each unit of time. In other words, the object's speed changes at a constant rate.
The formula for calculating constant acceleration is a = (vf - vi) / t, where a is acceleration, vf is final velocity, vi is initial velocity, and t is time.
Uniform motion is when an object moves at a constant speed, while constant acceleration is when an object's speed changes at a constant rate. In uniform motion, the object's acceleration is zero, while in constant acceleration, the object's acceleration is non-zero.
An object in free fall, a car accelerating from a stop, and a rollercoaster going down a hill are all examples of objects experiencing constant acceleration.
Objects experiencing constant acceleration may also experience air resistance, which can counteract the acceleration and cause the object's velocity to reach a terminal velocity. This is particularly noticeable in skydiving or bungee jumping, where the acceleration of the person is affected by air resistance.