I have actually proven my self (up too 6 meters thats all the room i had) that it is possible to make a marble track that makes the marble go along totaly un powered for ever.
The track is what moves the marble. It uses the force of gravity where the track is tapered so the marble runs across but if you put it on a tiny gradiant enough to go on a nother bit of track it will be able to taper again and again and never run out so it could just keep rolling across the tapers and i was woundering how come no body else has thorght of this.

I presume you're trying to suggest that you've invented a perpetual motion machine. Sorry to disappoint you, but countless other people have thought of it and they've all eventually discovered they were wrong or gone mad trying to prove they weren't. If you seriously want to pursue it, be aware you're throwing your life away following an impossible dream, but, hey, it's your life. There are people willing to fork out serious amounts of cash to the person who cracks it, but they're gonna want conclusive, incontravertable proof. Good luck.

Sorry dude but Nemesis is right, the marble may have run for a long time but eventually it would have stopped for two reasons. friction between the track and the marble, though tiny, would still have been an opposing force (causing retardation in the marble) and good old wind resistance, again although small it still acts to reduce the marbles velocity. Add to this the fact that to turn the marble needs to have accelaration (change in velocity) this centripetal accelaration has to take its energy from somewhere and in this case it is from increase in the force the marble applies to the track thus increasing friction.

OK... I'm picturing this marble trundling round this track, inexhaustibly, round and round. Lugh & Nemesis, whose posts I've been reading and sometimes arguing with, for a while and I tend to believe, say it can't work, but I'm picturing this in my head anyway, and while I watch the marble trundling along all day, a single question keeps popping in to my head.... So What?

"So what?" This is the thinking that says that the world is flat and the light bulb won't work.Have a little imagination. Let the glass be half full here.

Although there is no chance of a perpetual motion machine the concept may be useful elsewhere with more thought. for instance the guy who first came up with the spinning top probably didn't realise that one day every single airplane relies on his invention airplane navigation (gyroscope). Mind you given that the spinning top is thousands of years old he probably wasn't thinking about airplanes.