Both federal child labor laws and Massachusetts state law concur that the minimum age to work is 14 (with some exceptions). But child labor laws in each state may vary regarding the minimum age to work and which permits are needed. When there is a conflict between federal and state laws, the strictest law will apply. Although 14 is the official age Massachusetts youth generally begin working, there are exceptions.
The moment of inertia, otherwise known as the angular mass or rotational inertia, of a rigid body is a tensor that determines the torque needed for a desired angular acceleration about a rotational axis.
On this instrument, one payload setup allows to measure two coordinates of center of gravity location and one moment of inertia. The instrument gives moment of inertia results directly through the center of gravity. Our spin balance machines (POI series) also measure CG and MOI, and therefore give moment of inertia through center of gravity results. Our MP series are instruments that also measure both CG and MOI, although with less accuracy.