Stop stealing all my upvotes

Perfectly understood the assignment, 10/10, no notes.

There'd be no cube but yes

For anyone who doesn't know, Optozorax on YouTube has made a finite element analysis simulation of gravity ontop of his portal simulation so we can get an answer to the question. The answer is both. Both happen depending on how fast the portal is moving and the where the second portal is placed in the gravity well.

you can in one specific spot in portal 2!

So the cube is just smashed?

It's a practical answer which is slightly upsetting because I wanted more discourse.

Skill issue

You'd make a horrible scientist.

Portal 2 has moving surfaces, with the cop-out that it's accelerating surfaces that cause the portal to break.

I did it deliberately.

Lemmy reads more than most but people aren't good at reading

I think any answer is a ragebait answer because nobody here understands physics

Trick question. Fun answers are not ragebait. Serious answers (correct or incorrect) are ragebait. You get an F.

In that situation both portals (the inside and the outside window frame) have equal, but opposite velocities and therefore cancel out any momentum from the person.

When dealing with OP's scenario, only one portal is moving.

wikipedia.org/wiki/Steamboat_Bill,_Jr.

Nearly a century ago. Fun fact, this movie inspired Steamboat Willie, the very first appearance of Micky Mouse.

The problem with this analogy is that both sides of the window are at the same point in space so there is no pressure differential. What if the blue portal was at the bottom of the Mariana's Trench? What force displaces the water to place the cube on the other side?

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

Speedy thing go in, speedy thing come out. Clearly explained in game.

What if the blue portal is at the bottom of the Marianas Trench?

WHAT DID YOU NOT UNDERSTAND ABOUT RAGEBAIT. ANSWERS. ONLY.

Except that one time when you use portals to cut the neurotoxin pipes.

The speed of one thing is the same speed of the other if you change the reference point. So the cube has momentum but the moving platform does not. It’s more about having a velocity in respect to the portal it’s going in or coming out of or an average of both. Like when you jump into a portal, you come out faster on the other side. Now what if that out portal was traveling at the same rate? Would you be traveling just outside the portal or double speed (in relation to the ground and static objects in the same room)?

But reference frame changes as the cube passes through the portal. The piston would feel resistance as its momentum is transferred to the cube to conserve it.

The cube has a speed of about 30km/s around the sun. You want to measure speed relative to the blue portal, but why that one and not the orange one?

"Plop"

Trying to conceptualize what that would be like is making my head hurt.

Fuck that's a cool channel, holy moly. Thanks dawg!

Exactly. What would that 'other frame of reference' be and how would the portal know about it?

Agreed. Also consider the duration of the time that the portal is passing over the cube. It is moving at speed, the entire way through the portal and out the other side and then it just stops dead immediately once through? That would hardly be a conservation of momentum anyway from any frame of reference and does not make any intuitive sense.