2022 F = ma Exam A — Question 19 — Physics Guide

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FMA-2022A-19 · 2022A F = ma (AAPT)

2022 F = ma Exam A — Question 19

A toy elephant is standing on the bottom of a fish tank. The fish tank is filled with water to a depth of 10 cm, completely covering the toy. The elephant’s legs are perfectly polished, so that there is no water between the bottom of the legs and the tank’s floor, and the total area of contact is 0.16 cm2 . The water has density ρ = 103 kg/m3 , the toy has uniform density 2ρ, the atmospheric pressure is Patm = 105 Pa, and the toy has total mass 120 g. What is the total hydrostatic force that the water exerts on the toy? 10 cm — Source: Question 19, 2022 F = ma Exam A, © 2022 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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