# 3.4.5: Principal Axes of Inertia

The inertia matrix or inertia tensor is \[\left[I_{xx} -I_{xy} -I_{xz}\-I_{yx} I_{yy} -I_{yz} -I_{zx} -I_{zy} I_{zz}\right]\tag{55}\] In linear algebra it was shown that for some angle equation 55 can be transform into \[other matrix\tag{56}\] System which creates equation 56 referred as principle system.

### Contributors

Dr. Genick Bar-Meir. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or later or Potto license.