Dear 1tree: Counter to my normal rule, I glanced at your Vis+viva link. Such is a laughable repeat of the status quo GARBAGE that I have so easily disproved and explained to you ad nauseum. Why is it that you consider finding a repeat of errant science as a refutation of TRUE science? Don't you understand that the Law of the Conservation of Energy-Mass is a CONTROLLING law in the Universe? Apparently not!
It is laughable that those many idiots you like to cite ascribe an errant formula, KE = 1/2 mv^2, to the 'energy' of a falling or down- swinging steel ball, and then make the ridiculous assertion that having an equal size and mass steel ball "bounce" to a matching height must prove the God Damned formula. It doesn't! The only thing the swinging ball proves is "energy IN must equal energy OUT"! The latter has always been a Law of Nature. You can't use a Law of Nature to support some ERRANT equation!!!!! If the equation had been my PROVEN KE = a/g (m) + v/32.174 (m), then the equation would have been additive on both the downswing and on the upswing, and would have been true science. Learn this: NO ENERGY EQUATION CAN EVER BE OTHER THAN ADDITIVE. Einstein, the MORON, lucked up when he made his GRT equations additive. If only he could have applied what he learned to realize that his SRT is patently wrong, the world of science wouldn't be as screwed up as such now is. ? NoEinstein ?