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Sagot :
Answer:
Explanation:
Velocity is always relative and reference frames are arbitrary.
Relative to a ground based observer with UP as his positive reference frame, velocity would be positive and acceleration would be zero as velocity is not changing. This person would write (+, 0)
For a ground based observer who chooses DOWN as the positive direction, This person would write (-, 0)
relative to a rider inside the elevator car, no sensation of motion or acceleration would be detectible (if no windows and a smooth ride). This person would write (0, 0)
Because problem writers are often not very imaginative, my GUESS is that the desired answer is the first option, which I have highlighted.
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