Yes, as I noted elsewhere in the thread, the part of the body exiting the portal will experience inertia as it enters into the space outside the second portal and it will be forcefully pushed by the next part of the body heading into the first portal and thus imparting momentum to the parts ahead.
If this momentum has to be taken from anywhere its from the portal itself and by extension the train.
Removed by mod
Interesting. It would be the same as if the trolley hit them directly.
Yes, as I noted elsewhere in the thread, the part of the body exiting the portal will experience inertia as it enters into the space outside the second portal and it will be forcefully pushed by the next part of the body heading into the first portal and thus imparting momentum to the parts ahead.
If this momentum has to be taken from anywhere its from the portal itself and by extension the train.