2018 F = ma Exam A — Question 13 — Physics Guide

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F = ma (11–17)

Dynamics

FMA-2018A-13 · 2018A F = ma (AAPT)

2018 F = ma Exam A — Question 13

A massless cable of diameter 2.54 cm (1 inch) is tied horizontally between two trees 18.0 m apart. A tightrope walker stands at the center of the cable, giving it a tension of 7300 N. The cable stretches and makes an angle of 1.50◦ with the horizontal. 1.5o The Young’s modulus is defined as the ratio of stress to strain, where stress is the force applied per unit area and strain is the fractional — Source: Question 13, 2018 F = ma Exam A, © 2018 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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