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F = ma (First 10)
Kinematics
FMA-2026-04 · 2026 F = ma (AAPT)

2026 F = ma Exam — Question 4

Two small balls are launched simultaneously from the same point at some height above horizontal ground. One ball is launched vertically upward with speed 3 m/s, while the other is launched horizontally with speed 4 m/s and lands on the ground at a horizontal distance of 20 m from the launch point. Neglect air resistance. At the moment the second ball lands, how far is it from the first ball?
Source: Question 4, 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.