And on a side note, I hope that Mur doesn't have access to Romanian nukes ... And those who say there's no such thing as Romanian nukes, I pity your foolishness!
Perpetual motion is possible, if there is no expending of energy. In a perfect system, you give a body sqr(mv)/2 energy it would infinitely move at a speed of v.
What? A perfect system doesn't exist?! Don't ruin my dreams!!!