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You are currently reading a thread in /v/ - Video Games
You are currently reading a thread in /v/ - Video Games
>>345453882
A, since the object is in a resting position with 0 velocity
The momentum would have to be coming from the platform with the cube on it to result in B.
So, A. would be the answer.
If the falling platform simply passes over the block how could it transfer it's momentum? B is retarded.
Memory is kinda fuzzy but I don't remember portals sticking to any moving surface.
>>345453882
It'doesn't hug the slope and slide down it. May or may not tip over and roll off. Gravity is pulling on it through the portal and downwards (since force carriers must be transmitted through the portal)
>>345454114
It doesn't have to be portals from the portal games.
Also the answer isA
>in b4 people that think that Newtonian relativity means you can arbitrarily pick the inertial frame of reference
>>345454114
You fire a portal gun on Earth, which is moving through space at 67000 mph.
>>345454198
It hugs the slope and slides down it*
my phones autocorrect is fucked
B, imagine it passing the portal real fast, it has to emerge real fast too and it can't just stop immidiately
>>345454357
****RETARD ALERT****
>>345454127
Does the "tunnel" through the portal have a thickness? Because otherwise it's infinite thinness would basically make it a super sharp knife edge that would totally do this.
>>345453882
Neither, because portals can't be on moving objects
>>345453882
B, the cube crosses the synapse at high speed, exiting blue at a high speed, and an object in motion stays in motion.
>>345454086
It doesn't. The cube maintains its velocity relative to the portal and does not change.
So, since it's moving fast relative to orange, it moves fast relative to blue.
The momentum comes from the fact that the two reference frames are moving relative to each-other.
Come on senpai you should know this.
>>345453882
Obviously B.
>>345454578
>the two reference frames are moving relative to each-other
Reference frames are closed systems you fucking moron.
>>345454578
But the cube has no velocity to start with, so how can throwing a window around a motionless object make the object move?
>>345454357
Now imagine the portal as a hula hoop.
a
>>345454578
>>345454086
So, the momentum gain doesn't come from the pillar, or from the platform, or from the crusher. It comes from the two parts of space moving relative to each-other.
>>345454671
Which gets broken because they've been connected by a portal.
Dumbass.
I emailed Gabe about this a few days ago and he forwarded me to Dave Kircher who worked on the mechanics of Portal.
>>345454785
fake
>>345454403
Fuck you it comes from the second portal being stationary while the first one is moving, prove me wrong, you can't
>>345454473
The cuba has no kinetic energy and the portal cannot transfer energy into it.
The cube just emerges super fast out the other side and then succumbs to gravity i.e. slides down the slope
>>345454741
The two sides of the window are moving relative to each-other. This is where the velocity change comes from.
You're right in that the cube doesn't move in its own reference frame (d'uh). The problem is that the cube's reference frame moves relative to the world.
Or that the world moves relative to the cube.
Or more specifically that the space around the orange portal is moving relative to the space around the blue portal.
>>345454785
A fags utterly destroyed.
>>345453882
>>345453882
Portals conserve momentum, they don't produce it.
>>345454885
>The cuba has no kinetic energy and the portal cannot transfer energy into it.
True. It gets the energy from the relative velocities of the portals. I.e. it's the space around the cube that goes from moving at 0m/s to sanic m/s. The cube doesn't gain speed, the space does.
>>345454768
Hula hoops that have both sides move independently of each-other are also known as warp drives.
What about air movement into portals? Do portals create a breeze?
>>345455156
Did you finish Portal 2?
>>345454785
you see the part where he says "I'm not a physicist"? It shows very clearly here.
>>345455084
The conserved quantity is Speed relative to the portal.
This is explained in one of the earlier chapters.
Speed relative to the orange portal = fast
Speedy thing goes in, speedy thing comes out.
You're incorrect in stating that portals conserve momentum, they violate it in-game pretty ridiculously easy. They do preserve kinetic energy, but only in their own reference frame.
>>345455190
Ages ago, I don't remember what happens when you put a portal on the moon
>>345455005
What a shitty engine
Who gives a shit, portals aren't real. Do we have to have this pointless thread so often
>>345453882
it's A the cube doesn't got it momentum through the platfrom it's just Passed through the portal,
>>345455218
>Speed relative to the orange portal = fast
And I'm sure that the air that it passes through, before coming to a dead stop at the platform that the object is resting on, felt at least something in the way of turbulence.
Even if the object were resting in midair, I doubt that the produced energy would be enough to produce to the results in B.
>>345455460
Intellectual stimulation? Fuck no wonder /v/ us retarded as fuck 90% of the time.
>>345453882
Between a and b, leaning closer to a
Some movement is transferred A, but not enough for it to look like B.
>>345455559
>And I'm sure that the air that it passes through, before coming to a dead stop at the platform that the object is resting on, felt at least something in the way of turbulence.
This presumes air resistance pushes against the portal.
If you're assuming this, then you also assume the portal pushes against the air, and can therefore push the cube.
>>345455681
you don't know how fast the platform is moving retard
>>345455460
it's a /b/ thread that leaks here all the time.
if everyone just did their duty and ignored it then we wouldn't have this problem.
>>345455434
?
But it works exactly how you'd expect
Cube goes fast into orange, cube comes fast out of blue
Though, the orange bouncing upwards off the ground SHOULD suck air back in through blue and produce a bit of a backdraft.
>>345454405
They have a gravity field that makes you unable to cut yourself and even if one portal disappears when you're in it, it pushes you out
>>345455730
With minimal results considering the context, and I'm sure I could autistically argue that it is the fuckmassive platform that has the portal on it producing the energy.
>>345455754
It's moving at at roughly five speed lines, fucking use your brain asswipe.
Daily reminder that if you say B you need to empty out your drool bucket
Fuck you, OP.
If you stick a portal on the front of a moving train and another on the inside of the train so that it looks like the front is open, it would function essentially like a hole, yes? If you were to stand inside the train you would feel the wind blasting your face.
Now imagine if you put the second portal not on the inside of the train, but in a stationary room somewhere else. Wouldn't it work the exact same way? You would feel the wind at the same speed the train is going.
Now imagine someone standing on the tracks. He sees the train approaching. But he also sees the portal and the stationary room beyond. He jumps in place at the last second and enters the portal.
If we accept that the previous scenarios were true then the man would fly into the stationary room at the speed of the train.
And this is essentially what B is.
>>345454785
>Cube is crushed by the relative movements of space
Neato
>>345456037
AIDF is here
Over 6 million joules of potential energy were destroyed in Cubau test chamber
>>345456124
Are you telling me what happens in video games is what will happen in real life?
Could you fuck yourself in the ass with portals?
>>345456228
neither A or B would happen in real life retard
>>345456246
Not comfortably.
>>345456124
>a shitty mod proves anything
Can anything be really not moving
>>345456246
this cause me to think
WOULD YOUR DICK TEAR OF IF IT WAS ON THE BOTTOM OF THAT FALLING PORTAL INSTEAD OF THE CUBE? LIKE THE PLATFORM WOULD STOP JUST WHERE YOUR DICK ENDS SO THAT YOU DON'T GO THROUGH THE PORTAL BUT JUST YOUR DICK
A OR B???
>>345456246
How would you thrust your dick forward while having your ass move backwards?
>>345456143
>Not using a food analogy.
Fucking normies.
Here's what needs to be considered:
If, instead of a piston with a flat surface moving towards the cube, it was a section of wall moving towards the cube, suspended by supports attacked to the sides of it, with the orange portal facing the cube, and the blue portal on the opposite side of the wall relative to the orange portal.
Would the cube move when entering the orange portal, or would it sit still?
Based on the physics in the games, it would sit still, because the platform the cube is sitting on is immobile.
So from this we can gather that in the game's fiction, the portals offer some way of connecting space and time that doesn't necessarily distort anything, but just acts like a door frame. There is then no reason to believe that B would happen.
>>345456402
You'd have to move the portals together back and forth.
>>345455005
>done in gmod
>the same thing done in portal 2 provides the answer of A
>there are people on here that actually think b would happen
It's /v/ so what do I expect
>>345456143
>Now imagine if you put the second portal not on the inside of the train, but in a stationary room somewhere else. Wouldn't it work the exact same way?
No because the train is moving and the stationary room is not
>>345456280
Person in real life here.
Can confirm that both a -and- b happen in real life, because in real life these two conditions are not distinct.
>>345456246
As the distance between the two portals does not change, entry would be difficult, as you would be required to essentially bend your dick in half and unfold it into your own ass. Thrusting would also be ineffective as this does not change the relative distances of the two parts, though angling your dick or your ass left and right will produce fiction.
It is possible though inconvenient.
Suggest using your hands to masturbate instead.
>>345456246
You could suck yourself off easily tho
>>345456394
That's a good point
Say you stand a brick up on its side on the platform and move the portal down fast as fuck but stop just before it envelops the entire brick
Would the brick get catapulted through the portal, since the part of it that went through is experiencing an impulse?
>>345456569
surly you have a video on hand
>>345456394
inspired to make the improved paradox
>>345456806
This thought is the key.
In the game, the brick would stay still, so we can assume A would happen in this case.
However, fictional physics, etc.
>>345456993
Top kek
>>345456994
Suppose you have two portals next to each other in the ceiling
You shove a brick halfway through one portal
Will the brick now hang there suspended on its own, since gravity is equally pulling it in both directions?
>>345456246
No, but you could use your dick as a wall dildo.
Block with portal on it is strapped to your dick (so your dick is always through the portal regardless of how you move).
Put other portal wherever is comfortable for you to bounce on or push against.
So you can't do the fucking as a male would, but you can as a female.
>>345453882
You can try this out yourself. You just need a ball and a hula hoop.
>Toss the ball into the air
>Grab the hula hoop
>Swing the hula hoop so the ball goes through it horizontally
Did the ball suddenly start moving horizontally?
Answer is A.
>>345453882
Post the proper sized image, faggot.
Also, it's B.
>>345457227
retard one of the portals is stationary
You can't apply newtonian physics to portals since they don't make sense in that framework. Only a few principles (inertia) are emulated in game because that's what make the game fun. You can't come up with a good answer because there is no good answer.
>>345456806
Tough question.
I'd say since the part of the brick that has already exited B is moving at sanic
and the part that hasn't entered B yet is stationary
It'd take the average of those two - so that stopping orange halfway results in a brick going at exactly 0.5 (half) a sanic.
That said, this situation involves not only moving portals, but ACCELERATING portals.
And I have to say that general relativity is beyond my expertise.
>>345457361
Who the fuck cares about the game? We're talking about portals in real life here
>>345457465
I need to shitpost in response to your post and I don't have an appropriate shitpost for this situation so here is the MTV negress cringing
>>345456920
after many minutes of scrolling
Can't you make a mod in game to test this?
>>345456806
see 5. >>345454785
>>345456993
B, in case of zero gravity.
Distance between portal and cube is changing.
There is no change in energy after the box passes through portal.
So, the distance will be still changing, but in reverse.
>>345457227
You have to realize that they're portals, not hula hoops.
Don't imagine it as dropping a hole on top of the box, which is what would happen in A. Think of it from B's perspective. A box is coming out of the portal and then stopping. The main law of portals is that speedy thing goes in, speedy thing comes out. But the box isn't moving! - The thing is here is that it is coming out of the blue portal at the speed of the orange portal's descent, and then it stops. It stops because it's sitting on top of a platform, and the fact that it's a stationary platform is the reason it would pop off in scenario B.
Both scenarios are possible with the way you look at it. Real world physics makes you think it's A, but portal logic would make it scenario B.
>>345457932
why do you think cum is blue?
If the block were going up on a platform that came to a sodden stop then it would be propelled
If a ceiling came down on it then it would just sit there.
With the portal taking it to a slope it would fall from gravity there is nothing causing the block to have inertia since it's in a stationary position.
>>345457613
not done with the cube, therefore inadmissible
>>345458141
Don't think of it as going into the orange portal, think of it as coming OUT of the blue portal. It comes out of the blue portal, but because it's sitting on a stationary box, it would pop off. It accelerates out of the blue portal, and then stops, and then pops off.
Check the graphic at 7:00, it explains how it would look.
https://www.youtube.com/watch?v=eOBKIJ5dyHk
>>345458107
I can't change the background color easily with paint
>>345457960
Retarded logic.
So if a doorframe falls over your head you would be catapulted into the air because that's the distance is changing but in reverse?
Aka, the portal moving away from the object?
videogames
>>345453882
For those who voted B, care to explain your reasoning?
>>345459046
imagine platform falling really fast, it means it will emerge really fast, it can't just stop immediately after emerging at 99.9% light speed etc.
>>345457171
>>345459169
Sure it can, the portals are what's moving, not the cube.
>>345459169
But there's no solid platform or layer to transfer kinetic energy to that cube.
>>345453882
I love these threads, anyway.
what if when the cube is halfway through the portal?
Does one half have momentum and the other half not?
Does the cube rip in half?
>>345459046
Imagine that you where aiming a radar gun at the cube through the blue portal. You would see that it traveled towards you at a speed of x mph. Why would that speed disappear when it exits the blue portal?
>>345459282
one of the portals is moving and that's what makes this complicated
>>345459607
Because the speed isn't applied to the object in its path, the speed stops when the platform hits the other platform. The momentum isn't applied to the object because there is no transfer of energy to it.
>>345453882
Physicist here.
The answer is B.
The cube will come out of the portal at high velocity, think about how quickly it will emerge from the blue portal.
In scenario A, a massive force in the exact opposite direction would be needed to decelerate the object almost instantly.
And what force would that be? You can't think of one.
In the absence of such a force, you would get scenario B (although subject to gravity of course).
>>345460469
Not physicist here.
I think perspective changes the answer. If you're looking at it from the blue side you'd imagine it being propelled out because it's obviously moving toward the blue portal at high speed.
However if you're looking from the orange side the opposite applies essentially, there's just a window falling over a immobile cube, the cube isn't being seen in motion so logic from B's perspective doesn't seem to apply.
I'm also high as fuck, forgive any stupidity.
>>345459859
But from the orange portal's frame of reference (and anyone looking through the blue portal), the cube is moving and the portal is stationary. In that frame of reference the cube has plenty of momentum since it's the one moving, not the moving platform with the portal.
>>345460972
Imagine that you had a camera on top of the cube, you would see the orange portal moving towards you, is it because of the cube or the portal moving, Spoiler:It's the same thing.
>>345461392
But the cube ISN'T moving, it only has the illusion of movement when you see it come out because portals.
>>345455005
the gmod portals literally don't even work the same way as they do in the actual portal games. they were fanmade and you can easily tell how the fans accomplished it.
The conservation of momentum in the example of a character running towards a portal is executed by taking the input speed and translating it as the output speed. In this mod and this example, that speed is a product of the falling portal platform - which is then transferred to the object passing through it.
In a real situation that wouldn't occur though. There is nothing physical about the portal that would allow the platform to transfer its energy to the cube.
>>345461392
Try applying the logic from B's perspective to A's, you can clearly see the block isn't moving, so when the orange portal slams down over/ around it what force would cause it to jump off the platform it was standing on and catapult across the room?
wait a second this is whole thing is retarded. you couldn't keep a portal attached to a moving surface to begin with.
>>345462417
How can you tell that the cube isn't moving while looking through the blue portal. You can see that the distance between the cube and the orange portal is decreasing. But you can't tell if it's because the cube or the portal moving. And that doesn't even matter because you would get the same result regardless of which one is moving, because it's all relative. The cube will exit the blue portal with the relative speed between it and the orange portal.
>>345463043
why not
>>345463958
But what transfers that energy from the orange platform to the cube if portals don't act on objects passing through them?
>>345463043
You can't for gameplay purposes, but it happens during a scripted bit in Portal 2
>>345464212
From the orange portal's frame of reference the cube is moving, it is this relative speed that creates the momentum required for B to happen.
Also, there is no *absolute* momentum, momentum is also relative.
>>345464769
I'm not asking where to momentum comes from, I'm asking how it's applied to the cube because portals don't transfer momentum, they let momentum pass through them.
I think what's fucking me over is I'm trying to apply logic to something that's completely illogical.
The only way the portal slamming into the platform the cube is on would transfer any momentum would be a slight "hop", like if you dropped something heavy on the floor next to a box it might bounce away a little. It wouldn't move away at the same speed the first portal was moving, that's retarded.
>>345458507
How can you compare door to two separated portals is beyond me.
Is every Afag here just rusing or what? This is elementary school logic.
>>345465713
Because in every situation we've seen them applied that's what they are.
>>345466213
One door frame can be at two different locations at the same time?
One door frame can be still and be moving at the same time?
>>345454357
You can portal- stand, so apparently it's safe
>>345456628
But the air has to go somewhere.
>>345460469
I see it. Helps to think of it as all relative. The cube gets pushed because it's forcibly entering the portal despite the fact that it hasn't been forced otherwise. I'm not a physicist at all but it's one of those things like the Monty Hall problem that's not intuitive at first glance but makes sense once you get it.
>>345453882
The cube is revealed through the end-portal at the velocity the start-portal is slammed onto the platform, accounting for that portal's velocity.
Then as gravity is now acting on it at a new angle, it falls at that new angle.
>>345459046
It's all relative.
