Question: You are standing on a bathroom scale in an elevator. In which of these situations must the scale read the same as when the elevator

You are standing on a bathroom scale in an elevator. In which of these situations must the scale read the same as when the elevator is at rest? Explain.
(a) Moving up at constant speed.
(b) Moving up with increasing speed.
(c) In free fall (after the elevator cable has snapped).

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