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Physics Problem of the Week for Oct 13 2014

Scale in an Elevator

A 85 kg person is standing on a scale in an elevator. What weight (in Newtons) will the scale read in the following cases.

  1. When the elevator is not moving.
  2. When the elevator is moving up at constant speed of 10 m/s.
  3. When the elevator is moving down at a constant speed of 10 m/s.
  4. When the elevator is moving up at 10 m/s and accelerating up at 2 m/s$^2$.
  5. When the elevator is moving down at 10 m/s and accelerating down at 2 m/s$^2$.
(Hint: As a guide, think of how your feet felt the last time you rode in an elevator.)

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