* Acceleration is the rate of change of velocity. Velocity itself is the rate of change of position (distance).
* Velocity is measured in meters per second (m/s). This means that for every second that passes, the object's position changes by a certain number of meters.
* Acceleration tells us how much the velocity changes per second. So, if we're measuring how much the velocity (m/s) changes every second, we end up with meters per second per second, or m/s².
Analogy:
Imagine you're driving a car. Your speed is measured in kilometers per hour (km/h). If you accelerate (speed up), you're changing your speed by a certain amount every second. This change in speed is measured in kilometers per hour per second (km/h/s).
In summary: The "squared" part of the acceleration unit represents the fact that we're measuring the change in velocity, which is itself a rate of change.
