I know I am abandoning the template but my question doesn't really fit in that template so sorry. Anyway for my Physics Assignment I have to do an EEI on a gravity car that I have to build, see this image for more help: http://seniorphysics.com/physics/gravity_car.jpg. Anyway I am struggling at the research bit. I have no idea what to research. What should I be researching, what should I be looking for in research and where should I be researching(eg Google or library etc)? I have tried 'physics of "gravity car" -anti -zero' in Google with no such luck. I just need some guidance. Thanks in advance.