Recent content by rg057

or if anyone knows of a link to a clearer proof, that would be appreciated also

thanks, altho the more I am looking at this the more i don't understand it, can anyone explain where the negative comes from?

Homework Statement i am examining a proof of kepplers first law for my conics project and I am a bit rusty on the physics, it begins withe the following line Homework Equations To begin with, we will start off by applying Newton's law of motion and Newton's law of universal gravitation...