A flywheel is a mechanical device that stores rotational energy. It consists of a heavy wheel or disc that rotates on an axle and is used to smooth out the fluctuations in rotational speed of a machine.
The power of a flywheel is typically measured in terms of its moment of inertia, which is the resistance of an object to changes in its rotation. It is usually measured in units of kilogram-meter squared (kg-m^2).
The power of a flywheel is affected by its mass, size, and speed. A heavier and larger flywheel will have a greater moment of inertia and therefore more power. Additionally, the speed at which the flywheel rotates also plays a role in its power.
A flywheel stores energy through its rotational motion. As the flywheel spins, it builds up kinetic energy which can be released to power a machine or device. The heavier the flywheel, the more energy it can store.
Flywheels are commonly used in machines and devices that require a steady and continuous power source, such as engines, generators, and electric motors. They are also used in transportation systems, such as trains and cars, to store energy and improve efficiency.