I forgot my password.
Don't have an account?
http://phet.colorado.edu/web-pages/simulations-base.html
That's fun.
I'm also a great believer in CAD (that's cardboard aided design)
good.
it can be use to middle school.
Cool tool for entry level physics. I would have enjoyed it going through, so I could actually see what my calculations could produce.
Thanks for your contribution. Very good page.