You can either try to add pseudo physics or study a bit to find out how it really works.
I believe accelerated objects actually use this:
(way in meters) = (acceleration in (meters/secondsē))/(2)*(time in seconds)
Now don't ask me about appropriate acceleration values. Start with something low like 3.
(speed in (meters/second)) = ???
I am not going to do this now. Too tired. X_X
BUT!! That is an amazing plugin you got there. Just wanted to say that. ;D