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An elevator uniformly accelerates upwards on earth, at an acceleration of a. How would the period...

An elevator uniformly accelerates upwards on earth, at an acceleration of a. How would the period of a spring hanging from the ceiling of the elevator change here? How would its equilibrium position? Now think about a pendulum with a length of one meter hanging from the ceiling of the elevator. If the elevator wasn't accelerating but was moving at a constant velocity, could you tell just by monitoring the pendulum's period?

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