Gotta be the longest description of v=x/t i ever read
Minus imaginary time dialations and imaginations of the mind such as Lorentz transformations.
Those are superluminal super imaginative delusions void of solid trajectory physics, like the quotes and phrases you find at half price books in the science-fiction section.
Since the combined effects of quantum mechanical structures exhibit a constant v=x/t movement pattern, all sub atomic particles behave accordingly and in accord produce the v=x/t formula for which you can measure velocity and trajectory with precision.
Since all mass in movement produces energy, any increase in variables produces an increase in results.
Since a very large amount of mass moving at a very slow speed can equal the energy of a small amount of mass moving at twice the speed of light...it goes without saying that multiplying all mass by a constant speed variable is incorrect. Since a large mass with slow speed can equal a small mass with incredible speed as far as energy is concerned. You do not HAVE to move mass at twice the speed of light in order to convert it into energy.
In fact, common everyday energy we use here on Earth happens at a much much slower speed.
Take an electric generator for example...spinning at 1000rpm...whether you like it or not...that is mass moving relatively slow and still being converted into energy...perhaps 14.4 volts 90 amps.
Therefore; E=mc2 is incorrect for calculating all energy conversions occuring at slower speeds, and perhaps even at higher speeds than c2.
I can convert the amount of mass from both of my hands into several units of heat by rubbing them together slowly but with a lot of force.
I can decrease the force i'm rubbing my hands together with but speed up how fast I rub them back and forth and get the same amount of heat or more.
E=ms is very simple and universally accepted as a precise indicator of how much energy you will get.
Where E is energy, m is mass, and s is speed.
Packing more mass into one location increases density, but don't forget you have more mass....a small ball of unobtanium may weigh several million tons...so if it's moving only 5 miles per hour...you have a lot of energy!