2015 F = ma Exam — Question 4 — Physics Guide

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F = ma (First 10)

Dynamics

FMA-2015-04 · 2015 F = ma (AAPT)

2015 F = ma Exam — Question 4

4. A 2.0 kg box is originally at rest on a horizontal surface where the coeﬃcient of static friction between the box and the surface is µs and the coeﬃcient of the kinetic friction between the box and the surface is µk = 0.90µs. An external horizontal force of magnitude P is then applied to the box. Which of the following is a graph of the acceleration of the box a versus the external force P? — Source: Question 4, 2015 F = ma Exam, © 2015 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.

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F = ma problems are © the American Association of Physics Teachers (AAPT) and the U.S. Physics Team, the original source, and are used with permission. Problems shown here are adaptations: they have been reformatted by Physics Guide into separate question and answer-choice pieces for online multiple-choice practice. Physics Guide is an independent student project and is not affiliated with, endorsed by, operated by, or supported by AAPT, F = ma, USAPhO, or the U.S. Physics Team.

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