Tablet PC talk- There are free programs available at the Microsoft website that are specifically developed for the Windows XP Tablet Edition operating system. Under the Power Toys section you can locate and download a program called Physics Illustrator which allows you the user to draw objects, designate what material they are comprised of and modify their physics in various fields of friction and bounce etc. When you are done establishing the coordinates, drawing arrows for their direction, and connecting pieces together, you can then click the animate button to see the calculated end result. This program will entertain those of you with an interest in well, physics and you will lose track of time trying to get the objects to do exactly what you want. I would however like to see this program worked on a little more as it has the potential to be a fully functional program, but not as it is. My biggest complaint is that I would like to be able to export the .physi files as .mov's or .avi's for website viewing or merging with animations created by other programs. There are not a whole lot of resources online for Physics Illustrator but where they are - I have been.......... unfortunately without finding a solution. In spite of missing a few fundamental physics forces and the file saving issue Physics Illustrator is worth the free download and is a lot of fun to play with.
The Physics Illustrator source code is available here.