An airplane is consuming fuel at a rate of 7 gal/ min when cruising at a constant altitude of 10,000 ft at constant speed. Assuming the drag coefficient and the engine efficiency to remain the same, determine the rate of fuel consumption at an altitude of 30,000 ft at the same speed.

Q: Consider 0.8-cm-diameter hail that is falling freely in atmospheric air at 1 atm and 5°C. Determine…

A: Given data Diameter = 0.8 cm = 0.008 mDensity of hail = 910 kg/m3Density of air = 1.269…

Q: The form drag coefficient of a certain light aircraft is equal to 0.011. Its skin friction drag…

A: Solution: Given Data: CD,F=0.011CD,S=0.016CD,I=0.07CD,F+CD,SAR=7.01e=0.91   To Find: The…

Q: The aircraft is designed to carry up to 2800 kg of total mass. The wing area of the aircraft is 30…

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Q: At highway speeds, about half of the power generated by the car’s engine is used to overcome…

A: Given data: Velocity when a person drives normally, V1 = 55 mi/h Velocity when a person drives…

Q: Example 3 The drag coefficient of a car increases when the sunroof is open, and it requires more…

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Q: Commercially available large wind turbines have blade span diameters larger than 100 m and generate…

A: Given data: Blade span diameter, d = 75 m Radius of blade, r = 37.5 m Wind velocity, v = 25 km/h =…

Q: A monoplane weighing 2000 lb has a span of 38 ft. What is the power required to overcome the induced…

A: Given, Weight of airplane, W= 2000lbSpan of monoplane, D=38ftAltitude, L=10000ftVelocity,…

Q: The rectangular wing of a trainer aircraft has a wingspan of 15.3 m and a chord of 3 m, the chord…

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Q: A shuttlecock is launched from the ground with an initial speed of 37.3135 m/s at an angle of 7.8471…

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Q: If the lift and drag coefficients in an airfoil are 0.998 and 0.05, respectively, determine by how…

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Q: A shuttlecock is launched from the ground with an initial speed of 34.6092 m/s at an angle of 5.462…

A: Given When drag force becomes equal to weight net force is zero Final velocity can be determined as

Q: The drag coefficient for the car is CD�� = 0.28, and the projected area into the 20∘C∘C airstream is…

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Q: To reduce the drag coefficient and thus to improve the fuel efficiency, the frontal area of a car is…

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Q: When testing a new car, the car drives with a constant speed v = 140 km/h. The power of car’s engine…

A: Given data: The constant speed is of the car is v = 140 km/h. The power of car's engine is P = 120…

Q: What is the f (equivalent drag area) for an aircraft that creates 600 lbs of parasite drag at 10,000…

A: Write the density of air at an altitude of 10000 ft. ρ=0.0565 lbs/ft3

Q: An automotive engine can be approximated as a 0.4-m-high, 0.60-m-wide, and 0.7-m-long rectangular…

A: Given data: *The height of the automotive engine is h=0.4 m. *The width of the automotive engine is…

Q: A shuttlecock is launched from the ground with an initial speed of 33.3163 m/s at an angle of 8.1977…

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Q: The power delivered to the wheels of a car is used to overcome aerodynamic drag. Compare the amount…

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Q: Suzy likes to drive with a silly sun ball on her car antenna. The frontal area of the ball is A =…

A: The data given is,

Q: To reduce the drag coefficient and thus to improve the fuel efficiency, the frontal area of a car is…

A: Given that, The drag force on the car will be –

Q: A 70 kg bicyclist is riding her 15 kg bicycle downhill on a road with a slope of 8º without pedaling…

A: terminal velocity is reached  when there is no external force acting on the body that is in this…

Q: A 70-kg person paradropped from an airplane at 22000 ft. Given that the air drag that he will…

A: From dropped object from height, terminal velocity is where drag force is equal to weight of object.

Q: Consider a large commercial airplane cruising at a speed of 1050 km/h in air at an altitude of 10 km…

A: Given,  Speed of aeroplane (V)= 1050 km/h Altitude (h)= 10 km temperature (T)=  −50°C = -50+273=223…

Q: Calculate the velocity with air drag in m/s. Take the size across of the drop to be 3.8 mm, the…

A: Size across the drop, d= 3.8 mm= 0.0038 m  Hence, radius, r= d2= 0.00382= 0.0019 m Density of air,…

Q: ent of a vehicle increases when its windows are rolled down or its sunroof is opened. A sports car…

A: The frontal area of the car, A = 18 ft2.Drag coefficient when the sunroof is closed, CD1 = 0.32.Drag…

Q: The car shown in the figure below moves at a constant speed on a highway and has a drag coefficient…

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Q: The rectangular wings of a microlight aircraft have a combined spanwise length of 9.144 m and…

A: Given Data The spanwise length of wings is:l=9.144 m The streamline width of the wings is:L=0.9144…

Q: Nellie and Goldie are coasting on their bicycles down a 10° slope at 15 m/s through still air. The…

A: Air resistance, also known as drag, is a force that opposes the motion of an object moving through a…

Q: QUESTION 4 Determine the force due to drag on an automobile traveling at 70 miles per hour. Assume…

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Q: Bill gets a job delivering pizzas. The pizza company makes him mount a sign on the roof of his car.…

A: The Work drag  is        W=12ρairAV2CDL where    CD = 0.94 Average speed, V =45 mph…

Q: A 2-m-long, 0.2-m-diameter cylindrical pine log (density = 513 kg/m3) is suspended by a crane in the…

A: Given, The density of the log, ρ=513 kg/m3 The diameter of the log, D=0.2 m The length of the log,…

Q: If a 20 hp fishing boat motor can pull a 1150 kg boat with passengers of total mass 120 kg at a…

A: Given Data→P = 10 HP =10×746 watt =7460 wattm =1150 kgmass of passangers (M) =120 kgv = 13mswe need…

Q: Light oil at 75°F flows over a 22-ft-long flat plate with a free-stream velocity of 6 ft/s.…

A: Given data: Length of plate, L = 22 ft Stream velocity, V = 6 ft/s Temperature, T = 75°F

Fluid Dynamics

The study of the flow of gases and liquids, usually in and around solid surfaces, is known as fluid dynamics in physics and engineering. Fluid dynamics, for example, can be used to evaluate the movement of air through an airplane wing or the surface of a vehicle. It can also be used in ship design to increase the speed at which ships pass through water.