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F = ma (11–17)
Simple Harmonic Motion
FMA-2008-17 · 2008 F = ma (AAPT)

2008 F = ma Exam — Question 17

17. A mass m is resting at equilibrium suspended from a vertical spring of natural length L and spring constant k inside a box as shown: The box begins accelerating upward with acceleration a. How much closer does the equilibrium position of the mass move to the bottom of the box?
Source: Question 17, 2008 F = ma Exam, © 2008 American Association of Physics Teachers (AAPT) and the U.S. Physics Team. Adapted by PhysicsTrainer: reformatted into a separate question and answer choices for online multiple-choice practice; any shared setup from nearby questions is repeated here. Not affiliated with or endorsed by AAPT or the U.S. Physics Team.