EDIT: A great alternative is this:Physion
Recently I saw this video:By searching around I found a simple program that does almost the same things:
You sketch some object, connect them with springs, ropes or joints, add forces to the system and then watch its behaviour in real time.
The program is Physics Illustrator from microsoft and originally runs only on tablet pcs. However there some builds in the wild that can run on any pc.
Also Design-simulation offers similar but more proffesional and complex programs (and the program used in the video)
Download (Tablet ver): Download from Microsoft
Download (XP ver): Download from RapidShare
License: Open Source
Similar programs: Physion , Design-Simulation
Click Here for a great ebook on Physics!
