Portal question

Anyone who has played knows the answer is B

A obviousley

Whoops. Pikachu is right. It's A. I thought the portal was on the platform which doesn't make any sense. Maybe I should get some sleep for the first time in 56 hours

You're both wrong, the answer is B because only the exit portal frame of reference applies to the block after it passes through the portal.

That's interesting to think about. The rate of entry would make it go fast but the lack of momentum would kill its movement. So in essence it is a very fast object with no momentum. How far would it go? But then again we are talking about theoretical physics of a nature we can't fully understand yet

We might not understand portals but we don't have to, because we only have to look at the exit portal frame of reference, pretend it is a closed system. And yes it does have momentum, momentum is mass times velocity, it obviously has mass, and in the exit portal frame of reference it has velocity. And the entrance portal frame of reference is irrelevant so it doesn't matter that it has no momentum there. Momentum doesn't even really exist, it's just a concept/product. If an object has velocity and mass then by definition it has momentum.

This is one of those things that I won't believe what people say it does until I see it

I would tend to agree with this.