Sure, Hooks law is a rule for particle simulation that makes the particles reach out from or away from a goal by hooking particles onto each other. It looks like how a strong magnetic field makes a series of metal objects stick to each other. It's a cool effect to watch. I'm only familiar with it through XSI. But if you're thinking of trying to simulate it interactively, I'm not sure how to help you.

I'll look for information on the technical aspect of it if you're interested. Or if you'd like me to email you an animation of hook's law in action, I can do that for you too.

EDIT: I did a google search and found a simple physics example showing Hook's law. It doesn't look terribly complicated. You take a look and see what you think.

http://www.suremath.com/suremath/suremath/kinDir/springW.html