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F = ma (Final Problems)
Simple Harmonic Motion
FMA-2011-19 · 2011 F = ma (AAPT)

2011 F = ma Exam — Question 19

Questions 19 and 20 refer to the following information A particle of mass 2.00 kg moves under a force given by F = −(8.00 N/m)(xˆi + yˆj) where ˆi and ˆj are unit vectors in the x and y directions. The particle is placed at the origin with an initial velocity v = (3.00 m/s)ˆi + (4.00 m/s)ˆj. 19. After how much time will the particle first return to the origin?
Source: Question 19, 2011 F = ma Exam, © 2011 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.