The great debate

A fags are retarded.

What about this?

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This one is even more retarded than the first one.

B
I'd expect if you were standing in front of the blue portal you'd be getting a lot of wind already so a projectile bigger than air would also gain movement

You've never played Portal, I see.

That's not how relative velocity works.

I'm sorry, is this a game mechanics question or a physics question?

These threads are pointless shitfests in which neither side tries to comprehend the other side's argument. Moreover, Yea Forums is too retarded to discuss science.

In these threads, I have had people try to convince me of the following:
• that momentum is not a vector;
• that the only valid frame of reference is that in which the Earth is stationary;
• that conservation of energy does not need to account for gravitational potential energy.

Even if I wanted to discuss physics with you retards, it would be pointless anyway because everything that could be said on this subject has already been posted a thousand times. So I'm just going to post some relevant images.

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I used to think A because I was thinking in Portal terms but now I think B because of relativistic perspectives.

The top platform with the portal is moving at a certain momentum, and transfers this momentum to the cube when it reaches the bottom platform and stops. From the point of view of the cube, the world is now rushing towards it at a certain speed through the portal and then abruptly stopping, so the cube takes the momentum instead due to conservation of momentum.

B is demonstrated in the game itself. Unless 'A'-fags wish to explain how this scene didn't result in Chell and Wheatley flying off at 2000 miles per hour.

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Trying too hard

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Someone will fall for this, I guarantee it.

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obviously A what the fuck?
the cube isn't moving, the press is
the press would hit the platform the cube is on and stop the momentum, the cube would plop out onto the floor because the blue portal is at an angle

B fags on suicide watch

It's blue and orange portals. We're talking about the video game's physics then. Anything else is irrelevant.

>its the "i dont understand relativity and think the portals are a hoolahoop" episode again

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How is it not the bottom platform that's taking the momentum? If the cube takes the momentum, you're right. But I just dont see it going to the cube and not the bottom platform entirely.

>E = 0
After cube passes through the portal
>E=1/2*m*v^2

Something doesn't compute

A 100%. If B were even remotely true, then the box would get annihilated by the portal. Think about it. If passing through the portal imparts force upon the object passing through it, then when the box is halfway through, the force imparted by the portal would rip the box in half.

Since people can pass through the portal mostly undisturbed by the portal transport itself, we can assume that A is the only correct solution.

Which is it, Yea Forums?

I'll post the answer after a few of you embarrass yourselves.

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those scenarios are literally one and the same
it doesnt matter who moves towards whom
it only matters that portal and cube are moving relatively

A. In context of the entire system, the box's relative speed to the orange portal is irrelevant. The speed relative to the blue portal is what will determine the exit speed.

>relativity
you keep using this word, I don't think it means what you think it means

Why is it going at an angle? It'd be going straight up.

What "doesn't compute" is simply the fact that portals don't conserve energy.

>put blue portal at height = 0
>put orange portal at height = 10 m
>send object through
>object gains potential energy, for free
>object falls
>object returns to its original height with additional kinetic energy, for free

Portals magically giving energy isn't really new. We know that portals at different heights can give free gravitational potential energy. So, although we don't see it happen in the game, it's not unreasonable to assume that MAYBE portals moving at different speeds can give free kinetic energy.

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Neither

It’s A because I’m B the box is moving at a 45 degree angle which wouldn’t happen

Yes it does, you moron. The orange portal isn't the system. Relative to the system, box is stationary in A, and in motion in B.

>wojak poster
>0 arguments
imagun mah shawk

I don't know how mentally fucking retarded you'd have to be to believe B. would be the outcome. Are you actually baiting or some shit?

You have no idea how the game's physics work if you claim both scenarios to be the same.

this would be
>E=mgh
After portal
>E=1/2*m*v^2

Scenario where portal is moving towards the cube, cube has all of the potential energy it can gain, that is 0.

I considered including "cube goes straight up" as a possible answer. Maybe I should have done so. But it's not the right answer, in any case.

I was going to wait for more replies to but I'm just going to post the correct solution now because I don't really want to hang around in this thread all day.

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A, except the box will follow the moving box at the same velocity as the moving box.

Have sex

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portals by definition don't respect the laws of physics.
Conservation of momentum is thrown out of the window and they allow faster than light travel & information transfer.

Trying to apply real physics to them doesn't work

Relativity is a virgin word

>It accelerated
Why?
>Because I said so
Nice, now provide actual proof.

Portal 1 explains this
>speedy thing comes in
>speedy thing goes out
At least that's how it works in terms of the game and the engine. In reality? Got not fuckin idea

the orange portal moves around the box, so the box moves through the blue portal

Brainlet. Box will not attain any vertical momentum by going through the portal. It might get some horizontal momentum depending on how "tangible" the portals are, but never ever vertical.

It's A. you fucking retards. How fucking braindead are you? Is your IQ actually a single didig holy fuck

but do you not understand that cube has all of the potential energy when it is stationary? Unless you can magic out how portal can change state of energy of an object with maximum available energy, you are wrong.

/thread

>digid

Very convincing.

>Is your IQ actually a single didig
>didig

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It's A. I am an chemical engineer wagecuck. common sense on shit like this is literally what i do 40 hours a week

this guy is a pseudo intellectual retard.

People who answer B don't understand that portals literally only connect to areas of space. Me moving a planck length through a portal is NO DIFFERENT than moving through regular space. If B is true, any fluctuation in spacetime would send matter flying, since "moving through space will accelerate you". B-tards are absolutely mega brainlets.

You don't seem to be understanding my post.

If two portals are at different heights, entering the lower portal and exiting the higher portal will increase your gravitational potential energy, and you don't lose any other kind of energy in doing so. That's your E=mgh with two different h values. Therefore portals don't conserve energy.

as long as the portal is active, the two places on either side of it are next to eachother, same as two sides of a regular hula hoop.

The answer is A

kek

By that logic shouldn't it be impossible to place a portal anywhere since the earth is always moving?

how does this explain why energy is added applied to the cube when it is at the maximum available potential energy?

Where was your argument?

Speedy thing goes in speedy thing goes out. Relative to the orange portal the cube is entering fast, relative to the blue portal the cube must exit fast. It's B.

>momentum

It's materializing outwards at a certain speed. It's only an illusion of movement

These threads boil down to people thinking a portal is a valid point of reference when it's not.

A is only true if spacetime itself can accelerate an object. This is patently retarded. When you put an object in a gravity well, it's the gravity that accelerates the object, not the warping timespace. There is literally nothing in physics that indicates abnormal timespace can impart any sort of energy without gravitons.

you literally described b you insane mongoloid LMAO

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but he didn't use that word moron

relative to the blue portal it is stationary, it must be stationary, it's A.

amazing how brainlets who don't understand relativity use it all the fucking time.

You act like going through a portal is like being flung through space to the other point of the portal, when it's more like walking through a doorway

Ah, I see you guys never took a physics course.

Do you understand the concept of inertial frames of reference? The laws of physics are the same in every inertial frame of reference; it is perfectly valid to solve the problem in one and then translate to another.

I solved the problem in the frame of reference in which the box with the portals is stationary (pictured). Do you dispute this part of the solution? If not, then you shouldn't dispute the part where I shift back to the other frame of reference.

The math is all there. Show me where my mistake is, or fuck off.

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it's b you retards

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No you absolute slobbering brainlet. B has vertical motion afterwards. My explanation only gives the box horizontal motion, not BOTH vertical and horizontal motion.

Common sense

/thread

Every thread until B fags realize they're wrong

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This is actually true though. Momentum goes into the ground, not the person

The ball is floating. I use the pictured ghoulish freakhand to swing my hollow bat at it. According to A fags, the ball will fall down the moment my bat passes through.

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>Video game physics is IRL physics
Based brainlet. also
>Not even testing it on Portal

Not according to B-fags.

>didn't read
>assumes no proof was given
try reading

and according to Bfag the ball will suddenly fling off across the room

the platform hits the cube.....

>game with no physics proves physical question

Imagine being this fucking retarded, I feel bad for you "people"

I don't even know what you're saying anymore.
>maximum available potential energy
This is meaningless.

No, according to A-fags, the ball will remain in the exact same spot. A portal literally only moves space. A-fags say that the box doesn't move. A-fags say that the space moves.

>relative to the blue portal it is stationary
But the cube exits the blue portal, which requires the cube to move relative to the blue portal.

cope

I know, it’s just the edit I usually make for save the princess threads

Cant somebody just send this to Valve and ask for confirmation. They're not working anyways.

There is no force other than gravity and normal force acting on the block. It's A. Anyone who says B is a brainlet thinking too hard about it.

>People who answer B don't understand that portals literally only connect to areas of space.

This is my argument for B though. Since portals only connect two points in space, it doesn't have any way to stop the cube from moving after is has passed through the portal. Since it is no longer in the portal and the portal is just a connection between two points in space, there shouldn't be anything out of the ordinary that would allow the cube appear to move out of a stationary portal without having velocity.

Energy cannot be gained, only transformed.
Stationary cube has exactly 0 Energy, all it can do is transform it into other form that is also 0.

You are claiming that 0 energy can be turned into more energy be going through a portal, while never showed ability to spontaneously giving energy to any object going through em.

There's a difference between movement and materialization. The movement of space creates an illusion of movement for the cube

they could've programmed it like sure. but the fact remains, a portal is simply a doorway. if it existed IRL it would not contact the cube in any way. therefore there is no kinetic energy transfer.

You faggots do not understand energy or momentum balances, nor did steam apparently. and thats ok, but your shit arguments and obvious flaws in steams engine does not override newtons laws if this was to occur IRL.

get fucked

>walk through portal
>get flung out the other side because “muh RelATiVe VeLoCIty”
Imagine being a B fag in 2019.

>Energy cannot be gained, only transformed.
portals don't obey the laws of physics, they can and do create energy from nowhere, and they do this pretty much every time you pass through one

do you really think a single staff member there has an IQ over even 50?

You're assumption that cube moved is the flawed idea, cube never moves it's time space that is moving around it.

Your mistake is thinking that a portal is a valid frame of reference.

If the portal was attached to the back of the box, so the portals formed a tunnel through the box, the relative speed of the box would remain unchanged, you agree, right? So what is fundamentally different about a portal in a different orientation? Nothing, that's what. In other words, portals can't be valid frames of reference, otherwise they break their own internal logic.

The portals act like a hula hoop not some kind of tunnel with a magical pulling force. If the cube enters fast it leaves fast, there's no forces to slow it down.

>portals don't obey the laws of physics
Then what the fuck are you arguing about? Your imagination isn't interesting faggot.

it's a you retards

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But that is just in the portal, which is just a flat plane. Outside of the portal everything should be normal.

It's not moving at all so there's nothing to slow down- it's materalizing.

>Your mistake is thinking that a portal is a valid frame of reference.
Every inertial frame of reference is a valid frame of reference. You don't know what a frame of reference is. Read a book.
>So what is fundamentally different about a portal in a different orientation?
The math, which is correct, demonstrates exactly what is different about it.