The same laws of physics are observed by engineers and physicists. There is no difference in how they deal with creating macroscopic energy from nothing....It doesn't happen in any known way.GIThruster wrote: this trouble only comes up when engineers pretend to be physicists and ignore the need to do transforms that is so obvious to the physicist.
Just stick with one singular non-accelerating frame, and the maths of the engineer, physicist or high school student will all end up with the same answer so long as they do the maths right. And that is ALWAYS deltaKE<inputEnergy .
If the statement above is in doubt then it needs to be demonstrated algebraically that it is wrong. The time for hand-waving about it is over.