The area type of this, also known as the second type, has units of length to the fourth power for two-dimensional shapes.
The area type of this, also known as the second type, has units of length to the fourth power for two-dimensional shapes. When this is calculated for objects in the xy-plane, its value with respect to the z-axis is the sum of the values with respect to the x\- and y-axes. That rule is one version of the Huygens–Steiner theorem used to find this value for an axis not through the center of mass; that law is also known as the parallel axis theorem. In general, this can be found by adding mass times distance from the axis squared for each part of an object. Name this rotational analogue of mass, commonly represented with a capital I.
The area type of this, also known as the second type, has units of length to the fourth power for two-dimensional shapes.
mass moment of inertia [or rotational inertia or polar moment of inertia of mass; prompt on angular mass or rotational mass]