[brutt]

Perpetual motion is not hard at all. Satellites are in perpetual motion around globe for decades. It doesn't violate anything. Universe is infinitely old and still moving.

Perpetual motion _engines_ violate law of energy conservation, because perpetual source of energy can create infinite amount of energy, thus they are impossible, like perpetual source of water, or perpetual source of anything.

[quickthrower2]

Satellites fall to the ground eventually unless their orbit is adjusted.