• mctoasterson@reddthat.com
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    1 year ago

    This is correct. The motion of the people is relative to the Portal. It doesn’t matter if the trolley is accelerating the Portal towards them or something is accelerating them towards the Portal. Therefore they accelerate out of the other side with some retained momentum. Technically it probably resembles something in between pictures A and B.

    This reminds me of the experiment about whether an airplane could take off from a treadmill.

      • Natanael@slrpnk.net
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        1 year ago

        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.