A flywheel is a mechanical device that stores energy in the form of rotational motion. It consists of a heavy wheel that spins around an axis, and its inertia helps maintain a consistent speed. Flywheels are commonly used in engines and energy storage systems to smooth out fluctuations in power output.
In addition to their use in machinery, flywheels can also be found in applications like electric vehicles and renewable energy systems. They help improve efficiency by capturing excess energy during low-demand periods and releasing it when needed, making them valuable for balancing energy supply and demand.