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F = ma (11–17)
Simple Harmonic Motion
FMA-2026-14 · 2026 F = ma (AAPT)

2026 F = ma Exam — Question 14

In the following swing, all lines are rigid rods and their lengths satisfy the relation l12 + l22 = a2 + b2 . What is the period of small oscillation of the mass at point C? a A b l1 B l2 C
Source: Question 14, 2026 F = ma Exam, © 2026 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.