You need to use a motor and lightweight cable to lift a 2.0 kg copper weight to a height of 3.0 m. To do so, you’ve decided to use a 1000 V power supply to charge a capacitor, then run the motor by letting the capacitor discharge through it. If the motor is 90% efficient (that is, 10% of the energy supplied to the motor is dissipated as heat), what minimum capacitance do you need?