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F = ma (Final Problems)
Dynamics
FMA-2020B-22 · 2020B F = ma (AAPT)

2020 F = ma Exam B — Question 22

A point mass m sits on a long block, also of mass m, which rests on the floor. The coefficient of static and kinetic friction between the mass and the block is µ, and the coefficient of static and kinetic friction between the block and the floor is µ/3. An impulse gives a horizontal momentum p to the point mass. After a long time, how far has the point mass moved relative to the block? Assume the mass does not fall off the block. 3p2 8m2 µg 15p2 (B) 32m2 µg 9p2 (C) 16m2 µg
Source: Question 22, 2020 F = ma Exam B, © 2020 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.