How fucking retarded do you have to be to think this shit is B?

Actual retards lol

It's a relative velocity problem, the answer will be A, since relative to the moving portal the block is just sitting there.

Portals can't move. The premise is faulty. A and B are both false.
The answer is the cube gets squished when the orange portal dissipates.

do you think the mass of the wall with the orange portal is 0 or that it is accelerating at 0? You're the fucking retard, how fucking stupid are you?

>Portals can't move.
every thread like this, theres always that one no-imagination faggot

wouldn't it just be in the middle of the blue circle and not slide down or shoot out?

also isn't this just a game that has no real world bearing???

the answer is b. the portal can only interpret the speed of an object entering it. how can it know that it's moving vs the object that's moving?

Isn't the no-imagination faggot the one who didn't even try to run it in his head to see what would happen? Fag.

Trick question, the cube is glued to the platform

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this, simply changing inertial frames leads to different results

relative to what though, the reference points are arbitrary, but should agree. if we take the portal as the reference frame, and consider the other portal as stationary relative to it. the block moves towards it, and hence has some velocity and fires out of the other portal as in b. if we use the block as our reference, frame, with the other portal stationary relative to it, a makes more sense.

we need much more careful consideration of how portals function and their consequences in classical dynamics systems since that is how most people approach this problem

The only thing that's changing in the problem is the speed at which the piston portal reaches the block. Think of the portal as a ring.

If the answer is a how is the box not basically 1 dimensional when it comes out the other end?
remember, by your definition it has no velocity when it comes out of the other end of the portal

It's specified in the game that momentum relative to the portal is conserved. Obviously B

Weight. It's at an angle and therefore is pulled down by gravity and thus plops.

yeah, its a static ring that only knows how to interpret speed at which something is entering it. it keeps its momentum out the other side.

This is even dumber than thinking its B

It's b because the cube's momentum relative to the portal is conserved. Imagine if you flip the leftmost picture over, and have the cube fall into the portal instead of the portal falling into the cube. It's relative, and it doesn't make a difference. Go eat some chalk you 70 iq window licker

>this dumb fight again

Infected retard lol

Holy fuck user, back to 7th grade physics with you.

the portal moving down to a stationary object (the cube) is the same as if the portal is stationary and the cube is moving upwards.
this later gets translated to the other portal where the cube initially moves with a velocity with it's direction vector orthogonal to the plane (portal), or you could say the dot product of the velocity vector and the normal vector from the portal is equal to 0

if the cube is at very high velocity wouldn't it be b assuming the cube keeps the velocity through the portal? sorry for being retarded I just dont rly get it.

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The cube was never at a high velocity. The picture clearly shows that the portal is moving towards the cube. The cube is static. Therefore, its A. At least you realize you are retarded, which is why I answered.

>is equal to 0
I meant 1

its basic fucking movement and physics user i cant help you dropped out its clearly B

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in that case yeah ok. but if the cube were to be the moving object it would be b

It would slide off. How the fuck would it even fly upwards? What the fuck? The only forces acting on it are the gravity pulling down at an angle and down directly

Its obviously A. But the issue Im having is if you move The portal on to a stationary object what is the force that causes it to move or plop out?

When the cube enters the portal, the cube is not moving, the space/time around it is moving. It's net velocity will not increase/decrease.

Answer A.

Hi. Autistic retard here. This is what I came up with.

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Dont think any assumption lends itself to B except for 2. 3 couldnt work because the cube would need to be moving upward. Assuming 2 works something like gravity changes direction on the other side of the portal, A still occurs

the portal isn't moving at 0 retard

I totally A occurs too but I feel like people are assuming a lot of weird shit to have B happen, like the platform moving down when struck bu the overhead one

I totally agree* oopsy daisy

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someone explain how they think its B I need to know the logic behind your choice

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It depends on whether we apply real world physics, or Valve Source engine.

B
A person standing at the end would see the box rushing at them, and once it goes through it'll continue to rush at him

Assuming it's a worm hole

A portal is basically a doorway, you can throw an object through a door. If you pick up a doorway and slam it down on top of an object, the object won't magically go flying through it.

In the companion cube's perspective everything around it would accelerate leading it to spring forwards urgently because of the momentum of the platform rushing into it

no it doesnt you dog faced pony soldier

>A person standing at the end would see the box rushing at them
That's right.

>and once it goes through it'll continue to rush at him
No, it wouldn't, because the portal moving was what made the box appear to move. The box was never actually moving. Looking through the portal is more like looking at tv screen, where the other portal is the camera. If you were to drop a camera on an object, it would look like the object is rushing to you on the tv.

youtu.be/531FKCzTX40?t=2658

The teleporty bits in the portal have no matter there no momentum

>There are LITERALLY people browsing this board RIGHT NOW who think it's A

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I hope anyone who thinks it's B is just trolling.

Bruh......
The force of the piston is hitting the platform the cube is sitting on, not the cube itself, no actual force is ever applied to the cube itself to cause any projection through the air.

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Imagine thinking this should be a

It is B. The cube is going through the portal at the speed of the piston. Therefore the cube that has passed through the portal is traveling at the same speed as the piston. So when it has passed all the way through, it continues to have the same momentum.

If B is in the reference frame of the piston with the orange portal, than B will occur, else A will occur.

I could see the case for b since relative to the portal the box is moving. If you define the portal as your reference point this must be true. However due to the current non existence of portals it's not really a problem we can solve. Is it even an accurate premise that a portal could move and accelerate? It's a moot point.

Portal 2 proves you wrong :^)