this post was submitted on 26 Jul 2026
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Lemmy Shitpost

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Welcome to Lemmy Shitpost. Here you can shitpost to your hearts content.

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[–] flying_sheep@lemmy.ml 3 points 8 hours ago (3 children)

No momentum in relation to what? Momentum doesn't exist in isolation.

[–] philipp_@discuss.tchncs.de 4 points 6 hours ago

Momentum relatively to the source game engine grid.

[–] SirActionSack@aussie.zone 3 points 6 hours ago (1 children)

"speedy thing go in, speedy thing come out."

So A.

[–] flying_sheep@lemmy.ml 1 points 6 hours ago (1 children)

As I said, there is no “speed” in isolation. Speed is a relative property of an object and a reference frame (i.e. another object, like e.g. a planet)

[–] SirActionSack@aussie.zone 1 points 4 hours ago

In this particular case it is speed with respect to the fixed reference frame of the game.

[–] Nalivai@lemmy.world 1 points 6 hours ago (1 children)

To the space outside of the blue portal. Moving the orange portal doesn't drag the whole surroundings, so assuming both places are on the same planet, the momentum of the box in relations to both places is the same

[–] flying_sheep@lemmy.ml 1 points 6 hours ago (1 children)

As Optozorax taught us, gravity must act through the portal.

[–] Nalivai@lemmy.world 1 points 2 hours ago

Well, it doesn't in the only source of knowledge we have: the game Portal. I don't know enough about gravitational forces to have a coherent theory on it, gravitational waves moving through space-time is a bit beyound my real understanding. But in the game if you put a portal on a ceiling, it doesn't "suck" you until you're throuth it, so there it isolates gravity somehow.