Nine elements and product of inertia may be lsited in a matrix array.
Here left to right diagonal terms give mass moment of inertia terms, while the product of inertia , oriented at mirror-image position about this diagonal, are equal. Thus the matrix is symmetric.
Moments and Product of Inertia |
Izy = Iyz Thus, there are nine inertia terms at a point for a given reference at this point. The reference may be situated outside the body, for example like this. |