There's no need to explain what this means. You can calculate the acceleration with this formula:

a = Dv / Dt

a = acceleration
Dv = change of velocity
Dt = change of time

Example: if we know that a car accelerates 0-27.7 m/s (100 km/h) in 5 seconds, we can calculate the acceleration:
a = Dv / Dt
a = 27.7 m/s / 5s
a Ë 5.6 m/s² , so we would write 5.6 as acceleration.

But here are some values again:

1.0 = Very slow. Even slower than a truck.
2.0 = Acceleration for trucks or buses.
3.5 = An average value.
6.0 = This is a good one if you want to have fun.
6.7 = A fast sports car.