What is the most power that can be generated from the potential energy of a 1000 kg mass at a height of 10 meters. Suppose you can lift a 1000 kg weight at virtually no cost in energy. How much electricity can be generated either through gear box and ball screw spinning a flywheel, or directly turning high RPM generators. 4 ball screws and gearboxes geared in such a way to control the rate of descent. Is that power limited to the calculated potential energy of the mass.