# Moment of inertia of a torus of tube (about a diameter)

## Description

Mass moment of inertia measures the extent to which an object resists rotational acceleration about an axis, and is the rotational analogue to mass.

A torus is a surface of revolution generated by revolving a circle in three-dimensional space about an axis coplanar with the circle. If the axis of revolution does not touch the circle, the surface has a ring shape and is called a ring torus or simply torus if the ring shape is implicit.

For a torus of a tube moment of inertia, about a diameter, can be calculated by the radius of the torus, the cross-sectional radius and the mass.

## Variables

I | Moment of inertia of a torus of tube (about a diameter) (kg*m^{2}) |

m | Mass (kg) |

a | Radius of the torus of the tube (m) |

b | Cross-sectional radius (m) |