I need to do a 2D center of mass project for my calculus class. I'm not looking for anyone to do my project but my professor this semester is a REAL bastard. Class average on the first exam was 47%, and we can get up to 12 extra EXAM test points. So I need a really good idea for this project. Any physics or math teachers have any ideas that would impress them? I need something that can be put together in two weeks, and a hint about how to put it together mathematically wouldn't hurt either! PS: I need to be able to make a physical model of the project and demonstrate it to the class Thanks!