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F = ma (11–17)
Dimensional Analysis
FMA-2020A-11 · 2020A F = ma (AAPT)

2020 F = ma Exam A — Question 11

The maximal tension per area a material can sustain without failure is called its tensile strength. Plain steel has a tensile strength of 415 MPa. What is the maximal mass one can hang on a vertical steel rod of negligible mass and a diameter of 2 cm?
Source: Question 11, 2020 F = ma Exam A, © 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.