- A flywheel converts potential energy of mass into rotational kinetic energy. From this rotational kinetic energy, the moment of inertia of the flywheel is calculated.
- The mass, m, is raised to a height h above ground, wound n times. After the mass is released, the flywheel rotates N times with angular velocity
$$ω=2π\frac{N}{T}$$
$$I=\frac{Nm}{N+n}\left[\frac{2gh}{ω^2}-r^2\right]$$