A or B?

A or B?

B, yawn.

A, yawn.

Portals cant be in motion, yawn.

A for arseface
B for brain owner

Afags skipped physics in school

A, the box isn't moving

neither, you cant move portals moron

A. The box is not exhibiting inertia and the portal isn't either.

mods

A in real life
B using in-game physics

Everything is in motion, yawn.

A, as glados said "speedy thing goes in, speedy thing goes out", if you change speedy to stationary you have the answer.

portals cannot have relative motion, if they could then space would be compressed

Imagine if instead of a Portal, the piston was like a big hollow tube with an opening the same size as the blue portal that moved downward with the same force. Once it hit the surface the companion cube rests on, would the cube then be launched upwards into the tube? Obviously not. The answer is scenario A.

Momentum is a vector you mong. Portals never conserved momentum in the inertial system, only in their relative system.

A, just consider the case for when the portal moves over it much slower than in the gif. The cube will just slowly emerge from the orange portal as it is enveloped by the blue one, until it is fully through.

Thats just Valve not wanting to code their game properly.

>box isn't moving
but the platform under the box is. its a car collision scenario.

...

My dick is in motion.
In your mom, yawn.

Maybe for your fat ass, but for people who don't have a mass of a small pickup and are still able to move their legs the cube is in motion.

Here's how things are supposed to really work.

B will happen in game, but in real life it's A. And B could have happened in real too, if the moving platform was the bottom one, as that's the only way the kinetic energy could travel into the cube.

>doesn't use the cube, but a heavier object
>hurr why am I slower

Neither, but A is closer. The moving portal creates a vacuum that sucks air and the cube into it. That's not enough to launch the cube like in B, but it wouldn't remain 100% stationary either. It'd pop up a bit before falling back down.

/thread
the game was actually used for it

...

Portals require an infinite amount of energy to be created, we know this as there are various ways to create a perpetual motion machine with them which can only be possible if they already take an infinite amount of energy to make.
Since we know Energy = Infinity, let's do a couple of equations.
E = mc^2
As we know c = the speed of light or 299 792 458 m / s, and 299 792 458^2 is 8.9875518e+16, and that Energy is Infinity, the equation becomes
Infinity = m8.9875518e+16
The only way for the equation to match up with one another is if Mass is also Infinity.
Therefore, a portal has infinite mass.
F = ma
We already know m = Infinity so the equation becomes
F = Infinity x a
Any form of acceleration would require an infinite amount of force.
The portal cannot have 0 mass, as energy for massless objects can have the equation of
E = hf
Or Energy equals Planks Constant x Frequency, as Planks Constant is a finite number, frequency must be infinite.
The equation for energy can also be
E = hc / wavelength, as Planks Constant and Speed of Light are finite, wavelength must be 0.
But Light is equal to wavelength x frequency, but 0 x Infinity = 0, making light move at 0 speed if portals were massless.
Ergo, the answer is Ѭ, the piston is unable to move as it would take an infinite amount of force to move the portal situated upon it.

Can't be in motion relative to each other, dingus

nothing is in motion. Something with no energy is not going to magically inherit energy from nowhere.

You can prove this right now on your desk. place a small object on your desk. Now take a cup, turn it upside down and slam the cup over the object. Notice how the object didn't fucking jump through the cup?

Consider the following:
The blue portal only moves down such that half the cube goes through the portal
What happens?

they don't have real weight, moron. The cube and the player are the same "weight" in the game.

you mean like

Why didn't he use the cube for the actual problem?

If it is, the OP pic demonstrates it very poorly. To me, it looks like only the portal above is moving, while the pedestal at the bottom is in a state of rest. The portal above just serves as a hole for the cube to go through. The cube is not in motion in any way.

It's A.

This makes it obvious it isn't B because then it would confirm the portal's act upon objects like a vacuum on its own by sucking the cube up from the ground.

It's A.

The box has no kinetic energy as the blue portal comes down and no energy is transferred to the box.

because it doesn't work it the engine.

>nothing is in motion
relative to what?
Because the portal is in motion relative to the cube
>Notice how the object didn't fucking jump through the cup?
I...what? The cup transfers kinetic energy to the desk which bends and transfers it to the object

B.

Explain how the cube stops after exiting the stationary portal, A-fags.

>Jumps off the platform prematurely
>Doesn't show what happens when stationary on the ground
This doesn't answer the actual question. The argument that it works like a piston only applies when on the piston, not jumping through it yourself.

>no kinetic energy

you're saying if you're inside a car traveling at 60 mph suddenly stops then you're not going to be propelled forward?

imagine there was hole where the portals are instead of a portal
the box wouldnt move like in A

>explain how the cube stops
The cube never starts moving

this would work yeah but the box and platform have inertia in the scenario

In the situation you just described, the passenger has kinetic energy for sure, and the box does too but I said it didn't due to the reference frame.

In the car, our reference frame has the passenger and the car moving at 60 mph. Kinetic energy is there. In the OP example, there is no velocity in the reference frame; the box isn't moving. Sure the box IS moving with the earth but that's irreverent in the example since everything is moving with the same velocity.

Again, the box has no kinetic energy and still doesn't after since none was transferred to the box itself.

...

he's saying that if a tunnel was coming at you at 60 km/h and stopped just after you fully passed through it, you wouldn't go shooting off at 60 km/h.

...

How did it exit the stationary portal, then? If neither is moving in relation to the other, it can't possibly pass through the portal.

The portal is a hole. It's negative space. It's nothing. That's like saying the void inside a hula hoop is moving. Moreover, how stupid would someone have to be to look down through a hold in a descending elevator and think that the world is moving up towards them? That's you.

A. Think like pic related

yes

>box isn't moving
but it is. if there was nothing under the box then sure I'll agree. but its being pushed by the platform underneath it.

>Leaves the ground
>Goes through the portal normally
>Turns it into the hoop/hole argument by ignoring the source of relative momentum
>Cube stays on the ground
>Ground pushes the cube through the exit portal, relatively speaking
>Cube goes flying
It's B

Correct

b fags are absolutely retarded

Both sides of that "portal" are moving at the same speed.

In this scenario, one side of the portal is moving while the other is not. It's a completely different context.

There is no pushing force. There are no forces acting on the cube except for friction amd gravity. Its like taking a ball floating in air and putting a hula hoop through it at 70mph.

>that the world is moving up towards them?
It literally is though

>Its like taking a ball floating in air and putting a hula hoop through it at 70mph.

terrible analogy. the ball floating in the air isn't the same as a box resting on a platform

The platform is pushing up on the box with a force equal to mg where m is the mass of the box and g is the gravitation force of the earth. We know this because before the portal falls, the box isn't moving; Force down on the box is equal to the force up by the platform.

None of those forces change as a result of the portal falling. The box does not move.

A is literal only answer. The box is not in motion. Portal is a hole that takes you from one point to other ya? Let's pretend a big wall with a hole in it is the portal x and y. You jump through it, you fly. if you stand still and move the wall through you, you do not suddenly fly out of the hole, you stay still.

You realize you that just used an old bait vid from garrys mod as your proof. You realize that right

>There is no pushing force.
Yes there is.
The part of the cube that's still on the other side of the portal is pushing the side that's already through

...

>There is no pushing force

Irrelevant. If we accept the premise that the cube can pass through the portal, we must accept that some magical force was applied to it that allows it to move.

>make a ring with my fingers
>slide the ring around my index as fast as I can
>my index finger isn't launched away
wtf

portals arent real you fucking faggots

Bad test. The box clipped the side of the portal and you can tell it did because the box is spinning erratically as it exits. Collision fuckery is the cause of it launching out like that.

THANK YOU. jesus christ Bfags are beyond retarded

B(asic physics)

Bfags will never recover.

neither is MLP

Imagine being on the other side of the portal. and you see the box moving at a fast speed towards you.
According to A. it will just plop down.

fucking retards.

That's literally the workaround the first webm went through. They jumped into the air first. I even said they turned it into the hoop argument, which you just used.

What we're arguing is if something is on the GROUND below a moving portal, because there are two frames of reference.

portals are just holes that don't have to right next to each other. if you take a piece of paper with a hole in it and slam the hole down onto an eraser does the eraser come flying out the other side, you fucking retards?

>spider analogies

>but it looks like it moving if you stand on the other side bros! That means it IS moving!

...

If the box itself is moving fast, it has kinetic energy and it will continue to have it afterward.

GLADoS in Portal 1: "Momentum, a product of mass and velocity, is conserved between portals"

Applying this to the OP's example, the box initially has no momentum, and thus will still have no momentum and as a result, no velocity.

Assuming you can move portals it's neither. The cube does a short hop due to the force of the two surfaces smashing together but not because the cube itself carried any momentum.

It is literally moving once it makes it through the portal. It doesn't just materialize from the top down, the top has to move up for the rest of it to get through.

A
i'm sorry for every retard who thought it's B and your bad physics skillz

C the portal disapears as soon as the platform moves, did you even play the game?

>It is literally moving once it makes it through the portal.
Key words user "once it makes it through". As in it's not in motion until its all the way through.

...

>playing reddit: the game

C. Portals aren't fucking real so there is no definitive answer and you should stop talking about a decade old puzzle computer game designed for kids

It *looks* like it's moving. Imagine standing in a dollhouse with a hole in the floor and looking down through the hole as it descends over a cube. Your dumb ass might think the cube is moving because it looks like it is but it is not.

>As in it's not in motion until its all the way through.
its motion is relative to the portal

I'll take the mystery box

see

...

Asking the real questions here.

Now what?

go back to your containment board

god intervenes

>its motion is relative to the portal
The portal is irrelevant. It's the object that would need to carry motion for it to shoot out.
Using your logic people would shoot out of hula hoops.