Hi, I just had a thought today and i thought i'd come here and post it up, hopefully i got the right section. Keep in mind i haven't done physics for a year. :uhh: Anyways, i know you can't create, or destroy energy, so, i assume i'm correct in assuming there's a finite ammount of energy in the universe. Now, say you have a chunk of rock floating through space, it happens to fall under the gravitational pull of a planet, now this rock would gain kinetic energy wouldn't it as it falls towards the planet? when it hits, it disperses into heat etc etc, so that's okay, but the energy where did it come from? Was it transferred from the gravitational pull of the planet? If so, would that mean that gravity has infinite potential energy? Since a gravitational pull never weakens unless the mass of a planet is decreased (which isn't happening) so I doubt that, because that would mean that energy in the universe is not finite, and that energy can be created... i think. So then i thought, perhaps the chunk of rock has potential energy already floating in space, as it was predetermined to fall to that planet, but this would only apply to newtons model of the universe and that all particals theoretically have a path laid out for them, but with quantum physics that was disproved. So can anyone tell me the real deal or poke holes in my writing?