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3:52 AM

@antimony I think your referring to the problem of how do we get classical from quantum mechanics and as far as I remember there isn't a straight forward way of doing this especially with the subtleties involved.

Also apparently there is potential energy transformation law in Galenian relativity O_O

aapt.scitation.org/doi/10.1119/1.5084927

More Anonymous

4:11 AM

Nope wait I skimmed again

ignore this^

1 hour later…

More Anonymous

5:29 AM

@JohnRennie hope you don't mind me pinging you. But do u see any fallacy in my line of reasoning in my latest question? It's classical mechanics and you like to explain that kind of stuff (usually to kids :P ) so I pinged :P

John Rennie

5:44 AM

Q: Minimum energy required to behave like a turning point?

So I've managed to confuse myself. We know if the energy equal to the potential energy then point at which the energy exceeds the potential energy it behaves like a turning point (slide 2). Usually in the collision of (say billiard) rigid balls we assume $V = \infty$. I realized since it's behavi...

@MoreAnonymous This?

More Anonymous

@JohnRennie yup

John Rennie

So we could for example put a particle in a finite potential well with a depth of 6J and give the particle a KE of 5J, then the turning points are at the walls where V > KE.

And you you're asking what if we now transport the whole system at some high speed so the KE becomes ¹⁄₂m(v + some high speed)² and it's a lot greater than 6J?

More Anonymous

6:06 AM

yup

Raphael J.F. Berger

Hi there, I posted a Q on MSE but obtained no resonance. As it's strongly physically motivated maybe someone of you can help me here a bit? math.stackexchange.com/questions/4477140/…

In particular I would be happy on some hints on how to perform such a decomposition numerucally. i.e. if you have "only" numercial access to the field.

More Anonymous

@JohnRennie feel free to directly write an answer. I'm replying intermittently cause I'm suppose to be at work

2 hours later…