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F = ma (Final Problems)
Gravitation
FMA-2022B-25 · 2022B F = ma (AAPT)

2022 F = ma Exam B — Question 25

Two masses are initially at rest, separated by a distance r, and attract each other gravitationally. If their masses are m and 2m, then they will collide after a time T . How long would they take to collide if they both had mass 2m?  3/2 2
Source: Question 25, 2022 F = ma Exam B, © 2022 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.