Concept explainers
The reason why the aerodynamic coefficient of drag of a formula one race is greater than an ordinary automobile.
Answer to Problem 2.1E
The aerodynamic drag coefficient of a formula one race car is often substantially higher than that of a regular car.
Explanation of Solution
The drag coefficient is a non-dimensional quantity that is used to assess an item's drag or resistance in a wet environment such as ambient air. The object will have substantially less aerodynamic drag if it has a low drag coefficient. The coefficient of drag is always proportional to the surface area.
The drag depends on many factors such as density, viscosity, compressibility, the square of the velocity, body inclination, and size.
The relationship between body form, inclination, air viscosity, and compressibility is complicated in general. This is represented by the drag equation. The drag is as follows:
Where,
A is the reference area
V is the velocity of an object
From the above equation, it is observed that aerodynamic drag increases with the square of the speed. The speed of the formula one car is much greater than the speed of the ordinary automobile.
Want to see more full solutions like this?
Chapter 2 Solutions
FUND OF ENG THERMODYN(LLF)+WP NEXT GEN
- A gasoline engine uses 0.01 kg/s of fuel while delivering 55 kW of power. The heating value of the fuel is 35,000 kJ/kg and the fuel density is 900 kg/m^3. In the question that follows, select the answer that is closest to the true value. What is the thermal efficiency of the engine?arrow_forwardThermodynamics Determine the force required to accelerate a mass of 25 lb at a rate of 80 ft/sec^2 vertically upward.arrow_forwardHow airways transportation make use of thermodynamics?arrow_forward
- (a) An automobile having a mass of 900 kg initially moves along a level highway at 100 km/h relative to the highway. It then climbs a hill whose crest is 50 m above the level highway and parks at a rest area located there. For the automobile, determine its changes in kinetic and potential energy, each in kJ. For each quantity, kinetic energy and potential energy, specify your choice of datum and reference value at that datum. Let g = 9.81 m/s².arrow_forwardTHERMODYNAMICSarrow_forwardQ12: Which of the following is the extensive property of a thermodynamic * system ? O (a) Pressure (b) Volume O (c) Temperature O (d) Densityarrow_forward
- The fleet average fuel economy of one car-maker fails to meet the present CAFE target (27.5 mpg) by 3 mpg. As we know, this will incur a penalty of $ 165 per car. Assuming that the first owner of a typical car bought from this car-maker drives it for 100,000 miles before selling it. If the carbon footprint of gasoline is 2.9 kg/litre and 1 US gallon = 3.79 litre how much extra carbon does the car emit? 5264 kg 4894 kg 2536 kg 3625 kgarrow_forwardAn internal combustion engine is a commonly-analyzed thermodynamic system. In a few sentences, describe the flows of energy and matter across the boundaries of a typical engine.arrow_forward1. A 6-cylinder, 4-stroke marine diesel engine generally operates at 3000 revolutions per minute with a fuel consumption of 650 liters at 299 Kelvins with 28°API gravity units. Determine the density of the fuel and the amount of fuel consumed per hour in kilograms.arrow_forward
- The outer surface of a transistor is cooled convectively by a fan-induced flow of air at a temperature of 25 °C and a pressure of 1 atm. The transistor's outer surface area is 5x 10 *m. At steady state, the electrical power to the transistor is 3 W. Negligible heat transfer occurs through the base of the transistor The convective heatarrow_forwardThermodynamics explain the application of the first law of thermodynamics to appropriate systems.arrow_forwardAn aircraft engine produces (1.800x10^3) kW power at maximum cruise mode. If the specific fuel consumption (sfc) is (3.18x10^2) g/kWh, find its fuel flow rate. The answer should be in kg/min with three significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answerarrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY