2012 F = ma Exam — Question 11 — Physics Guide

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F = ma (11–17)

Dynamics

FMA-2012-11 · 2012 F = ma (AAPT)

2012 F = ma Exam — Question 11

11. As shown below, Lily is using the rope through a ﬁxed pulley to move a box with constant speed v. The kinetic friction coeﬃcient between the box and the ground is µ < 1; assume that the ﬁxed pulley is massless and there is no friction between the rope and the ﬁxed pulley. Then, while the box is moving, which of the following statements is correct? — Source: Question 11, 2012 F = ma Exam, © 2012 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.

AP Physics 1 and AP Physics C (Mech) problems are adapted from OpenStax College Physics for AP® Courses 2e and University Physics Volume 1, © OpenStax (Rice University), licensed under CC BY 4.0. Problem text is reproduced exactly; correct answers come from the OpenStax answer keys. For written-answer problems, the incorrect answer choices were written by Physics Guide. Physics Guide is not affiliated with or endorsed by OpenStax or the College Board.