>>519985But relative to the platform the cube didn't move at all. From that alone it should be obvious that thinking "relative to the portal" like that is incorrect because it causes a conflict. Also, there is no force that stops it because it has no momentum to begin with thus is already at rest. Lets assume its in space so it doesnt just roll out of the portal, what would happen if you pulled the portal back? Well what happens is you're splitting apart two places in space, so i guess it depends on the mechanism the portal relies on
