A full-sized automobile has a frontal area of 24 ft2, and acompact car has a frontal
Chapter 9, Problem 9.75(choose chapter or problem)
A full-sized automobile has a frontal area of 24 ft2, and acompact car has a frontal area of 13 ft2. Both have a drag coefficientof 0.5 based on the frontal area. Find the horsepowerrequired to move each automobile along a level road in still airat 55 mph. Assume that the power required to deform the tirescontinuously at this speed (called rolling resistance) is equal tothe power to overcome the air resistance. Estimate the gas mileageof both automobiles if the energy supplied to the drive wheels is 14 that available in the fuel. A gallon of fuel has 1.0 108 ft 1bavailable energy.
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