Final answer:
The flywheel gets its energy from an external source, the person turning the crank provides the energy through their muscle power, the battery stores chemical energy, and the generator converts mechanical energy into electrical energy.
Step-by-step explanation:
The flywheel, the person turning the crank, the battery, and the generator are all sources of energy, but they get their energy from different sources.
The flywheel stores mechanical energy. This energy is typically obtained from an external source such as an engine or a motor, which produces the energy required to spin the flywheel. For example, in a car, the engine provides the energy to rotate the flywheel.
The person turning the crank provides the energy through their muscle power. By exerting force on the crank, the person converts their chemical energy (stored in their body) into mechanical energy that is transmitted to the flywheel.
The battery stores chemical energy. When connected to a circuit, the battery converts this chemical energy into electrical energy that can power devices.
The generator converts mechanical energy into electrical energy. This mechanical energy can come from various sources such as falling water (hydropower), steam produced by burning fossil fuels, or the kinetic energy of wind. The mechanical energy turns the coil within the generator, which produces electrical energy.