Describing motion: Speed, Velocity and Acceleration

https://www.youtube.com/watch?v=b7VLGweUuzo

physics constant velocity

https://www.youtube.com/watch?v=9p-jLFt1DhA

Acceleration

Since acceleration is a velocity change over a time,When the velocity of an object changes it is said to be accelerating.Acceleration is the rate of change of velocity with time.

Constant velocity

when an object travels the same distance every second, then the object is said to be moving with constant velocity. This means that the magnitude of the velocity (or speed) and the direction of the velocity both remain constant.