Answer: Acceleration is the rate of change of velocity. Therefore, its unit is
.
Step-by-step explanation:
If we think about this, acceleration is the derivative of velocity. This means that acceleration is the rate of change of velocity as a derivative of either a position function or velocity function will be a rate of something.
Furthermore, if we want to think about the units, we have to think of all three functions. The position function would be in meters as it would be a distance. The velocity function would be in meters per second (m/s) as velocity (also called speed but without direction) will be moving a certain distance over a certain amount of time. This finally gets us to acceleration which would be in meters per second squared (you can think of the 2 being the second derivative).
Probably not the best explanation, but I hope it helps you understand it a little better.