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F = ma (Final Problems)
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FMA-2020A-20 · 2020A F = ma (AAPT)

2020 F = ma Exam A — Question 20

A car is driving against the wind at a constant speed v0 relative to the ground. The wind direction is always opposite to the car’s velocity, but its speed fluctuates about an average speed of v relative 2 , where A is a constant and v to the ground. The air drag force is Avrel rel is the relative speed between the car and the wind. What is the average rate P of energy dissipation due to the air resistance?
Source: Question 20, 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, with answer choices retyped; any shared setup from nearby questions is repeated here. Not affiliated with or endorsed by AAPT or the U.S. Physics Team.