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As I have explained many times before, energy is a scalar, i.e. it has no direction..

a=9.81m/s2 ... linearly fixed velocity constant

the carriage gains relativistic mass

electro-negativity holding electro-positivity in place

Quote from: TheBoxa=9.81m/s2 ... linearly fixed velocity constantQuoteThis is a contradiction.The roller coaster trolley, while it is falling vertically accelerates under the force of gravity.This means that the velocity is not fixed, but is increasing linearly.And the distance fallen is increasing quadratically.My own fault for putting an ambiguity sentence, yes the speed increases per meter, but I meant that 9 .81m/s2 is a constant rate on earth but nether mind. Quote from: TheBoxthe carriage gains relativistic massQuote from: TheBoxelectro-negativity holding electro-positivity in placeWhile Einstein was able to make amazing deductions from imagining electric trolley-buses traveling near the speed of light, I think it is more sensible for you to first come to terms with the kinetic energy of electrically neutral trolleys traveling nowhere near the speed of light.

This is a contradiction.The roller coaster trolley, while it is falling vertically accelerates under the force of gravity.This means that the velocity is not fixed, but is increasing linearly.And the distance fallen is increasing quadratically.

What is kE apart from vivid imagination?

We have a closed system so the roller coaster that receives that energy must have gained mass!.

Quote from: Thebox on 27/03/2016 00:10:41What is kE apart from vivid imagination?The purpose of physics is to build predictive mathematical models of things that happen. Classical mechanics describes what happens to objects larger than a molecule, moving at substantially less than the speed of light, for periods between the big bang and the foreseeable future. Three quantities are conserved in a classical interaction: mass, energy and momentum. Energy turns up in a number of forms, mostly as kinetic, potential and heat. The formal concept of kinetic energy as ½mv^{2} was a stroke of brilliance in the 17th century, though the relationship between KE and PE had been surmised thousands of years earlier and used by whoever invented the bow and arrow. The conservation principle has been understood and applied by every engineer from Newcomen to NASA.The discovery of radioactivity added a twist as it seemed that energy could appear ex nihilo but it turns out that the small correction factor E = mc^{2} completely accounts for the measured mass loss in nuclear decay and the observed momentum of the daughter particles.

Energy turns up in a number of forms, mostly as kinetic,

The speed of the fall creating an illusion that the object has gained something, the only thing gained is distance and falling acceleration Fn.

Force of impact increases with motion, +h (height)= + force, +force delta direction = parallel distance traveled.

If you get hit by a bus, it leaves very little to the imagination.... You wouldn't call the resulting damage poppycock!

And you can ignore relativistic mass (which is so small for a roller coaster or a bus that we can't hope to measure it).

I would call that force, the force of the bus was greater than my inertia

+speed = + force

1kg + 2my = ?mx