Mechanical-component is a specialization of COMPONENT from the component-assemblies theory. Mechanical components are three-dimensional objects with an associated reference point and reference frame. They also have a slot called MASS whose value is a scalar-quantity of dimension mass-dimension.
(3d-Dyad (Inertia-Tensor ?P (Reference-Point ?P)))
(=> (Reference-Point $X $Y) (Mechanical-Component $X)) (=> (Reference-Frame $X $Y) (Mechanical-Component $X)) (=> (Mass $X $Y) (Mechanical-Component $X)) (Nth-Domain Inertia-Tensor 1 Mechanical-Component) (Nth-Domain Applied-Force 2 Mechanical-Component) (Nth-Domain Applied-Force 1 Mechanical-Component) (Nth-Domain Applied-Torque 2 Mechanical-Component) (Nth-Domain Applied-Torque 1 Mechanical-Component)