[CS3] Inertia/Friction Drag thing

[Mctittles]

Ok, I'm not sure where to start on this, but I'm looking for a car like momentum on a clip that rests on another one that can be dragged.
In this image:

The red area is a movieclip that can be dragged with the mouse horizontal only. The blue area is a movieclip that rests on top of the red one.
What I'd like to do is if the user drags the red clip slowly, then the blue one moves along with the red one evenly. However, if they drag the red one fast then the blue one slides back. So dragging the red fast to the right causes the blue to slide to the left. Also if the red one comes to a sudden stop, then I'd like the blue one to continue along for a bit. So if they are dragging to the right and then stop suddenly, the blue clip keeps sliding to the right for awhile....
This would all be similar to having something in a car that slides when you take off and stop suddenly. Also it will not go past the blockers on the right and left of the red clip.

Any help is much appreciated!