# How is acceleration different from speed and velocity?

What we mean by this is that if an object has constant acceleration $a$, then it has a velocity $v = a t$, where $t$ is time (assuming the velocity is $0$ when $t = 0$). More precisely the definition of acceleration is $a = \frac{\mathrm{dv}}{\mathrm{dt}}$, but since I'm not sure if you know anything about differential calculus, I'll leave it at that.