"back of envelope" estimate (which you didn't actually share) "
If you are interested: going from v to 0 or going from 0 to v uniformly with acceleration in time t is related by v=at. The distance traveled is s=1/2a t^2. Plugging the first into the second gives s=1/2 v^2/a. So a=1/2 v^2/s= 1/2 (10m/s)^2/0.1m=500m/s^2~50g
Interestingly this directly follows from the definition of acceleration and doesnt use anything like Newtons laws.
Looking at the Video, why didn't they just do it in a controlled environment? Some gauges/meter marking and high speed cameras. The time it takes for the stop is in the order of t=v/a=10/500s=1/50s so only one frame in normal video rate.
Cheers for showing your work. But again, in the video, whatever it's faults, you do see a car hit a barrier and not go crunch, yeah?
> why didn't they just do it in a controlled environment?
Well, there is more than one video. The one we're talking about is obviously a public demonstration and not a scientific test. (There was one video that seems to have been removed now that showed a very good and clear demo of the ramp/glass being done at some trade show or convention. that video or others might still be on YT somewhere.)
What about that ramp/glass demo? A glass shatters when the little car thingy hits it, and then another glass doesn't shatter when the flywheel device is active.
And really, I haven't dug into this particular tech too deeply, it could well be a hoax.
But my point still stands, there are lots of interesting and useful ideas that work and get ignored or neglected. Magnus effect rotors, the Tesla turbine, desalinizing batteries, "Aircrete", etc...
I could literally go on all day, just listing the less "woo-woo" stuff off of Rex Research.
If you are interested: going from v to 0 or going from 0 to v uniformly with acceleration in time t is related by v=at. The distance traveled is s=1/2a t^2. Plugging the first into the second gives s=1/2 v^2/a. So a=1/2 v^2/s= 1/2 (10m/s)^2/0.1m=500m/s^2~50g
Interestingly this directly follows from the definition of acceleration and doesnt use anything like Newtons laws.
Looking at the Video, why didn't they just do it in a controlled environment? Some gauges/meter marking and high speed cameras. The time it takes for the stop is in the order of t=v/a=10/500s=1/50s so only one frame in normal video rate.