I think we need to take a more realistic treatment of what a portal really is and what it would do.
1) There would have to be a power supply, there would be a minimal amount of energy required to keep it open, as well as an amount of energy required to transport the object which would would increase with the momentum of the object it transports. (this takes care of the infinite energy problem).
2) It would have to transport the objects atom by atom (or more precisely particle by particle).
Due to relativity we know that in the determination of the velocity of the incoming object should be done from the reference frame in which the entrance portal is stationary.
3) FORCES ARE NOT FELT THROUGH THE PORTAL.
This is a must. If this were to happen then shoot a portal on the floor and you would feel infinite gravity.
From these 3 things we deduce the following:
>>4632266The first B option would occur because the forces binding the molecules together cannot act through the portal
(due to #3 above)
As for the OP, option B would be correct due to an argument similar to this:
>>4632406each particle is viewed in the entrance portals reference frame as having an upward velocity, therefore this is transferred to the blue portal.
If you think that the particles have a zero velocity when exiting the blue portal then explain to me why the block doesn't come out as a flat disk? Why don't all the particles clump on top of each other? The block must be exiting the blue portal at the same speed that it is entering the orange portal and will therefore continue with that constant velocity unless acted on by an outside force.
SO OPTION B IS CORRECT
(of course gravity will be acting on it, but that just makes it follow a projectile path, that is a parabola)
/thread
