You guys will discuss anything

You guys will discuss anything

obviously A

I tired to come up with an argument for how B would be a possibility but A undoubtedly the result.

i'd say its b cuz the orange portal is going down with some speed so its just like the thingy is falling to the portal

Well a portal can't be sustained on a moving surface, but if it could, the result would be B. That's relatively

No. The cube does not have any momentum.
It will just topple over when the ground tilts.

i know the cube does'nt have momentum but its the same as if the platform holding the cube was going up , its like throwing the cube but instead of the cube going up its the portal going down

>this

A. The ´cube´ have no momentum

You're wrong.

You're right.

The cube doesn't have any momentum or forces behind it, and just has something slam over it quickly, but what slams over it is a portal, ie. nothing solid. In other words, it wouldn't even GET momentum because nothing is ever actually touching it, it's just being phased through a fast moving portal.

Inertia motherfucker.

...

saying the answer is B is saying that just because everything AROUND an object has inertia, that the object will be moving. Try waving your hand over your keyboard, did your keyboard move?

Yes, because if you flip it, it officially has momentum and forces behind it, such as gravity. Are you fucking retarded or something? Gravity IS a thing.

This is like when people don't know the order of operations.

It reminds me of the plane taking off from a treadmill debate.

Since we cannot apply any physics to something that we don't understand : portals...

There is no good answer.

In the first system the lower part is not moved and it seems the cube is standing still. But as the portal drops down it exits this system and the negative velocity and opposite vector of the portal applies to the cube.

Think of it like you riding on a train. With your limited world view you only see the train itself and not the world around it that is why you assume subconsciously you are standing still. Same goes with the earths rotation. If one of these things were to stop entirely you would fly away in the the direction they were moving in.

I'm sick of these threads.

The answer is B

well shit.

We can picture them being directly connected. Imagine there is a hole in the moving platform and it's crashing down . the cube is then on the other side but hold on, the other side has different properties you have to consider, mainly gravity pulling at a different angle.

Also when the cube and the portal intersect it would only make sense that the cube gets transfered to the other side with the same speed the portal 1 uses to suck it up.

The answer is A

The cube has no kinetic energy and the only change to the system is the direction of gravitational force.

obv B. Red portal moving down relative to the cube means world behind red portal moving relatively to cube.

its not about momentum, its about relative speed.

If the cube were to fly, it would need kinetic energy already pushing it.

How could there be a "plop" with A?

That's inconsistent physics. The cube is not moving on one side of the portal, so it needs to be not moving on the other side of the portal too.

It can't move "just a bit to get out of the way", because the bits already through the portal would need to "get out the way" in the time it takes the portal to cover the cube, which necessarily means it needs to move at least as fast as the portal, which means B.

Imagine the portal is on the front of a train doing 150MPH, and it drives head-first into a stationary train. How fast would the train have to come out the other portal to get out the way of the rest of the train coming through? It would have to be 150MPH, because every minute that portal is eating 2.5 miles of train that's all got to go somewhere.

You can't have one rule for big fast trains and a different one for small slow cubes. That would be fucking ridiculous.

But we do understand portals. Understanding how portals operate is the whole fucking point of the game.

You know how your phone works, right? Even though you can't build one?

This

B is the answer. It's important to consider the velocity of the cube IN THE NEW REFERENCE FRAME. In frame 1 it's not moving, but the portal is moving down with a velocity v. If we transform to a coordinate system where the orange portal isn't moving (the portal rest frame), we equivalently see the block moving upward with a velocity v relative to the stationary portal. Thus, when it goes through the portal, the cube will have a velocity v directed perpendicularly to the portal axis and it will shoot out as in B (though its motion will in general curve given any external forces like gravity on the other side of the portal)

wrong. the cube does have kinetic energy in the portal frame. Think of a train. Standing on it, it has no kinetic energy. But a person observing a train from the platform sees a kinetic energy. You have to be careful before you apply physics.

This is of course, absolutely true at the moment the whole cube is inside the portal (coming out into B). Of course, the motion in B assumes that the collision of the orange portal platform against the base holding the cube originally will not lead to a force in the portal world. If so, then you would need to correct the motion, but the initial effect (velocity) is still B

Does anyone have the pic where it has c and the cube is technically still on the platform and is just popping out of the exit portal

You can't be "inside" a portal: they have zero depth. If they didn't, the goo would all fall down the gap into some portal dimension.

This is a diagram of what would be needed to get B as the result

In the original diagram the result would be A. The pull of gravity would shift from downward to diagonally and the block would tumble down. It doesn't matter how fast the portal is traveling

since red portal is moving, world behind red portal is moving, too. its about relative speed, dimwits

/thread?

god bless you

That's not how the game works at all. The portal is like a hula hope, the majority of your weight is either on one side or the other, whatever side you're mostly on with determine the pull of gravity.

Imagine you're playing the game and your character is standing still with a portal on a high speed conveyor belt is coming towards you. When it hits you what do you expect to happen? Your player goes zipping across the map on the other side? NO you'll just plop out on the other side standing still being immediately pulled by whatever the gravity orientation may be

Thats gay

No. If the platform holding the cube was going up the cube would have momentum. The cube being stationary on a platform, means no momentum.

Friend just did test on Portal 2's engine and physics through a custom map.

It's A.

The engine is called Source 2013

Btw thats remind me that sven coop goldsrc engine allow portal system too

Neither answer is correct faggots, thats because portals are not physically possible. It is complete dumbassitude to think one object can be moving at two speeds at once.

With respect to the portal, the block doesn't have 0 speed, so your assumptions on the left side are incorrect.

>not understanding reference frames
>being this dumb