AP · AP 2 · multiple choice
AP Physics 2: Algebra-Based · Question 1
AP Physics 2: Algebra-Based · Original GioPhysics question with a detailed, mark-by-mark answer guide.
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multiple choice1 mark
An ideal gas expands at a constant pressure of 2.0 × 10⁵ Pa from a volume of 1.0 × 10⁻³ m³ to 3.0 × 10⁻³ m³. How much work is done by the gas?
- A
200 J
- B
400 J
- C
600 J
- D
800 J
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Answer overviewCorrect answer: B — 400 J
01
1 markAnswer and reasoning
How to approach it
Predict from the governing principle before looking for a matching option. Then reject alternatives by checking direction, units, limiting behaviour or the physical meaning of each statement.
- 1
The correct choice is B: 400 J
- 2
C uses the final volume rather than the change in volume. Work at constant pressure is the area under the isobar, PΔV, and only the change matters.
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