Acceleration is motion at a velocity that is in a consistent state of change, right? So... v is in terms of m/s a is in terms of m/s^2 So what is motion at an acceleration that is in a consistent change? a^2 is in terms of m/s^3 or a^2 is in terms of m/s^4 ? Is this 'acceleration of acceleration' ever used? Howabout acceleration of acceleration of acceleration, etc etc ad infinitum?