Question

I understand that when an object's velocity is constant, acceleration is 0, but what if an objects acceleration is constant, is velocity changing?

Answer 1

Hi,
Two answers I guess:
1.(straight line motion) If acceleration is constant, then yes, the velocity is changing, constantly, by the same amount each second. acceleration has units m/s/s, so a 2m/s/s acceleration means that every second, the object increases its velocity by 2m/s.
2.(changing direction, like going in a circle). to go in a circle, an object must have a constant acceleration (towards the centre of the circle). Its speed will not change, only its direction, so it won't get faster but its velocity is changing (remember that velocity is speed with a direction, so if direction changes, velocity changes.)
hope this helps

Answer 2

Thanks!

Answer 3

Another way to answer your question would be to remind you that by definition, acceleration is equal to the rate of change in velocity:\[\large a=\frac{dV}{dt}=\frac{\Delta v}{\Delta t}\]