In physics, acceleration is defined as the rate of change of velocity, or as the second derivative of position (with respect to time). It is then a vector quantity with dimension ...
Acceleration velocity, in physics, the rate of change of velocity over time. An accelerating object is speeding up, slowing down, or changing the...
Since acceleration is a velocity change over a time, the units on acceleration are velocity units divided by time units - thus (m/s)/s or (mi/hr)/s.