2014 F = ma Exam — Question 17 — Physics Guide

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F = ma (11–17)

Gravitation

FMA-2014-17 · 2014 F = ma (AAPT)

2014 F = ma Exam — Question 17

17. A spherical cloud of dust in space has a uniform density ρ0 and a radius R0. The gravitational acceleration of free fall at the surface of the cloud due to the mass of the cloud is g0. A process occurs (heat expansion) that causes the cloud to suddenly grow to a radius 2R0, while maintaining a uniform (but not constant) density. The gravitational acceleration of free fall at a point R0 away from the center of the cloud due to the mass of the cloud is now — Source: Question 17, 2014 F = ma Exam, © 2014 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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