Every so often I come across what I think is a newly increasing use of an incorrect word. One such is 'inertia'.
As an example, in a story I have been recently re-reading I came across, "I learned that force equals mass times inertia." It is just the most recent of the many times I have seen 'inertia' used where 'momentum' or 'velocity' should be used.
Going back to my high school Newtonian physics, and paraphrasing badly: 'inertia' is the tendency to stay as you are, and 'momentum' is the tendency to keep going as you are. Force is required to change either. 'Velocity' is just vectored speed, and has little to do with 'inertia'.
I have tended to give these uses of 'inertia' the 'oh dear' response and move on, but my innate sense of caution has finally lead me to ask, "is there something going on here that I don't understand?"
Is there some reason, other than ignorance, that folk are using 'inertia' in a way that seems entirely inappropriate? Has some US state legislated a change in the naming of SI units? What is going on?