Good, then I’m not just being dumb….But you don’t recall at what point it goes from KE= 1/2m V^2 to E= M C^2 …or the equation/function used to determine energy below the speed of light but above the 1/2 threshold?

Somewhere below C (speed of light) it gains up to 1/2 the total system energy, beyond simple kinetic energy…I’ve heard this alluded to as mass becoming energy, but never with any explanation how or even if that’s reality or just a mathematical “trick” to make the equations work…nor an equation describing the process. I only took year one physics….over 25 years ago.

Hmmmm….
K.E. = 1/2 m v2
E = m v2 (only when v=c)
Does equation 2 include equation 1 or not?
Does total system energy E = 1.5m v2 (kinetic energy + mass-energy) or is the equation really E = 1/2m c2 + (K.E.)?

Anybody?

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Nope. Watched them closely.
Hitting a car flat at 60 km or mph is going to stop you in <1/10 of a second. I counted >4 seconds to stop with a flop in the video. Same kinetic energy absorbed. Δv = 30mph (around 50'/sec) Δt= .1 vs 4. Do the math. 500ft/sec/sec vs 12.5'/sec/sec...that's 50g vs 1.2g. Case closed.

Fine. God forbid you listen to someone with extraordinary personal experience in this matter and a grasp of physics.
You go for the dead stop next time you're in a wreck, I'll turn my wheel.

There are variables in car wrecks. You want to compare best case scenario sudden stops with absolute worst case rolls. Feel free to think that way. It's not reasonable. I'm done.

Then look at the dummy data if immutable physics laws aren't enough for you, but no citation is needed to conclude that exponentially higher G forces cause higher level injuries, even if the angle isn't the worst possible for a specific spinal injury.

I've given you my personal vast experience, physics, and common sense. You give me apple to oranges, and exaggerate the juiciness of the apples while only mentioning dehydrated oranges. I'm done. Believe what you want, but I hope you don't have to test your theory.

Why bring it up? Because the flop was far less violent than the other crashes. The energy it took to flip the jeep used up kinetic energy the other trucks put into stopping hard and fast. Having experience with rolling, I know they aren't as scary or violent as people expect.
My speed at the start of a couple of my rolls was up to 80mph, not controlled and slow. They were faster than this test. Like this test, the act of rolling slowed the vehicle considerably. My seat was not much deeper than many seats I see in cars, but slightly. My interior, however, was bare metal everywhere, not padded pleather. Because there are zero crumple zones, the impact was absorbed by the frame, so transferred throughout the seat to me.
As for whiplash, I think the heavy helmet I was wearing would multiply that, not protect from it. I had no hans device, no helmet straps.

Edit: rollovers like this are less likely to cause whiplash or spinal injury than coming to a dead stop like the trucks did.

Is it exactly the same? No. Is it significantly similar? Yes. Do I have a decent idea of what a violent rollover is like. Yes. Better than around 99.999% of people.

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*doublepromote *quality kinetic musical artgineering.

I was taught that E=(+-)MC2. (This implies antimatter)

I'm disappointed he wasn't totally clear that all he was doing was adding kinetic energy to the base equation. Of course that adds energy to the system, but the base equation is about mass/energy (how much total energy a certain resting mass contains) not all energy. Heat the mass, you need another equation. Make it radioactive, another.

Also, maybe it's been proven wrong by now, but I recall experiments showing photons do have at least a pseudo mass, proven by their ability to move objects (like the spinning black and white squares inside a vacuum toy and theoretical solar sails).

Uh, what? Nobody said that at all. It is neither a "classic example" nor an assumption. The trajectory has been tracked since it was discovered, which is hyperbolic around the sun, and the speed of the object is such that there is no way it could have accelerated to its current velocity due to the gravity of our sun alone, hence it has to be interstellar, picking up kinetic energy from another system outside of our own. The orbit is not improbable, it is unusual compared to trajectories of asteroids that exist within our own solar system. Sharpen your crayon there bud, and stop trying to impress people with your new thesaurus for hipsters (come on, "undergird"?? Really?)