Well it's very simple, if something goes on and on without slowing down that means that either there's no friction or you have to input energy to keep it going. So if you say it keeps on going without putting in work, you get more energy out of it than you put in. This might all be difficult to understand, so I suggest reading the wiki page on perpetual motion.
I didn't mean to offend anyone and have tried being courteous, you might want to try offering me the same respect.
As I've been saying earlier, believe what you want to believe.
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