...
I guess I need to dig up my pilot hand book before using inertia as an object being held at rest by opposing forces but the machinist hand book was established on the premise that when an object is loaded by a greater force at that moment it establishes the point of inertia in the objects failure.
You might be just using antiquated terminology. Which version of Machinery's Handbook do you have? I have a copies of the 20th & 23rd editions. I remember looking in the TU Library many years ago for information on flat belt tracking and crowned pulleys. I found it in some books from the early 20th Century and some of the terms were a bit different than even in the 1980s.
From the 23rd Edition:
p 129
"
Inertia is that property of matter which causes it to resist any change in its motion or state of rest.
Mass is a measure of the inertia of a body."
No I ain’t saw any flying saucers today exceeding the speed of light.
Of course not, they were gone before they got here.
Edit: 20th rather than 21st Edition.