A rectangular cartop carrier of 16-ft height 50-ft length, Ask an Expert

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A rectangular cartop carrier of 1.6-ft height, 5.0-ft length (front to back), and 4.2-ft width is attached to the top of a car. Estimate the additional power required to drive the car with the carrier at 60 mph through still air compared with the power required to drive only the car at 60 mph.

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