>>12397679I'm going to assume the portal works by some sort of tunneling, where the tunnel from one location to another fits the cube's atoms into a geometric spaghetti like tube. Where the are anti gravity affects in the tube, for some reason, where the spaghetti cube has no mass.
Also assuming there is no atmosphere present
If we assume the cube must move from one location to another, as if it is traveling, then the cube must accelerate to increase its velocity and then assuming it decelerates to its original 0 velocity, then the answer would be A, If the cube is under earth gravity, as situation A implies.
If however, the cube only accelerates through the tunnel and does not decelerate, then it would be situation B, under no gravity. Under Earth gravity the cube would move upward, until the forces are balanced, where it would have a velocity of 0 and an acceleration of -9.8m/s, after the forces are balanced, the cube would move downwards.
If the portals do not work via tunneling and instead somehow make the cube reappear without the need to travel that distance, then the cube would be stationary on the other side under a no gravity situation. It would be stationary as there is no force to accelerate or decelerate the cube. The portal would just move the cube to the other side.
This can be explained by the fact the cube is on the platform and the cube is at 0 velocity on the platform. of course, I am assuming that the portal does not have any surface, mass or substance. If the portal did have such a surface, then the cube would experience some type of collision that is likely elastic (assuming the cube is metal) and then perhaps situation B, but potentially situation A depending on the momentum of the portal (mass or velocity).
Where as if I assume the former situation of the portal where it has no substance, situation A would occur under a normal gravity situation. There is no accelerating force for the cube, as the platform and the cube are balanced forces...
