Constant motion refers to the motion of an object when its velocity is constant, meaning that the object is moving at a constant speed in a constant direction. This means that the object's acceleration is zero. An example of constant motion would be a car traveling down the highway at a steady speed.
Accelerated motion, on the other hand, refers to the motion of an object when its velocity is not constant. This means that the object is either speeding up or slowing down. The object's acceleration is not zero, and can be positive (if the object is speeding up) or negative (if the object is slowing down). An example of accelerated motion would be a car that is speeding up from a stop sign.
In summary, the main difference between constant motion and accelerated motion is whether the object's velocity is constant or not.
