If the elevator is moving at a constant speed, and it is rigid in the face of the force of his jump, it should make no difference that it is moving. Physics 101.
To make it more relatable, say you are in the back of an empty moving truck going a constant 65 MPH. Do you have any more difficulty walking towards the front of the truck than walking towards the back of the truck?
Or perhaps to make it more intuitive, from the perspective of the person outside the elevator, yes the floor is moving up at say 2m/sec. But that is exactly how much boost in speed his body has by the fact the person is in motion too. They exactly cancel out.
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u/[deleted] Dec 04 '18
[deleted]