2012 F = ma Exam — Question 20 — Physics Guide

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FMA-2012-20 · 2012 F = ma (AAPT)

2012 F = ma Exam — Question 20

20. A container of water is sitting on a scale. Originally, the scale reads M1 = 45 kg. A block of wood is suspended from a second scale; originally the scale read M2 = 12 kg. The density of wood is 0.60 g/cm3; the density of the water is 1.00 g/cm3. The block of wood is lowered into the water until half of the block is beneath the surface. What is the resulting reading on the scales? 45.0 kg ??? kg ??? kg 12.0 kg — Source: Question 20, 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.

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