Tensor of Inertia
Tensor of Inertia : Rotational analogue of mass. This is a symmetric (maximum six components), positively defined tensor that describes the distribution of mass in a rigid body. This tensor rotates together with the body if it moves, and its eigenvalues are called principal moments of inertia (diagonal components of the symmetric tensor). The tensor of inertia multiplied by the vector of rotational velocity is a part of the kinetic moment. In micropolar theories, inertial characteristics of each particle are density and density of tensor of inertia
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