I need to do some calculations to know if a metal sphere (iron, steel, whatever) that is 0.25kg is dropped from 2 meters, will it produce enough torque (kenetic energy?) to start a generator with the specifications below? Furthermore, if a metal sphere was dropped every second, continuously, would the generator generate the 3500 W? If not, what size would the metal sphere have to be to make the generator work? Rated rotation speed: 250 RPM Rated output: 3500 W Weight: 75 kg Rotor inertia: 0.066 Kg.m2 Starting torque: <2.0 NM Phase resistance: 2.7 ohms Recified DC Current at Rated output: 11A Required torque at rated output: 150 NM Thanks!