Bill gets a job delivering pizzas. The pizza company makes him mount a sign on the roof of his car. The frontal area of the sign is A = 0.612 ft2, and he estimates the drag coefficient to be CD = 0.94 at nearly all air speeds. Estimate how much additional money it costs Bill per year in fuel to drive with the sign on his roof compared to without the sign. Use the following additional information: He drives about 10,000 miles per year at an average speed of 45 mph. The overall car efficiency is 0.332, ? fuel = 50.2 lbm/ft3, and the heating value of the fuel is 1.53 × 107 ft . lbf/lbm. The fuel costs $3.50 per gallon. Use standard air properties. Be careful with unit conversions.

Q: Calculate lift, drag and (T/W ratio) for an aeroplane with velocity 500 m/s, wing area 45 m2 , a…

A: Given data U∞=500 m/sA=45 m2CD=0.05CL=0.9

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

A:

Q: How important is the study of aerodynamics in designing an aircraft and the effect on performance

A: How important is the study of aerodynamics in designing an aircraft and the effect on performance?

Q: 10.1 After getting gas, you forget your mug of coffee on the roof of the car. As you drive away from…

A: Given: m = 0.4 kg mu = 0.3 a = 1.4 m/s2 A = 0.01 m2

Q: A jet airplane weighs 160,000 N and has a zero-lift drag coefficient of 0.008 and a wing area of 42…

A: Given:W=160000 NCD=0.008A=42 m2v=100 m/sr=11.5 m/sT=27000 NLift coefficient,…

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: 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: A turbojet engine weight 7 kN and has a wing area of 20 m2. The drag coefficient of aircraft is…

A: Turbojet engine weight, FL=7 kN=7*103 N Wing area, A=20 m2 Drag coefficient of air craft,…

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 jet airplane weighs 160,000 N and has a zero-lift drag coefficient of 0.008 and a wing area of 42…

A: Write the given data for the airplane.     W=160000 NCD0=0.008    A=42 m2     v=100 m/s    rc=11.5…

Q: A skydiver jumps from (5.5000x10^3) m with no parachute into a giant net. The mass of the skydiver…

A: Given data Mass of skydiver = m = 1.05 x102 kg = 105 kg  Projected Area = A = 0.45 m2 Pressure = P =…

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

A:

Q: A small aircraft has a wing area of 37 m2, a lift coefficient of 0.45 at takeoff settings, and a…

A: Given data Wing area = 37 m2 Lift coefficient = 0.45 Total mass = 4300 kg Speed = 300 km/h =83.33…

Q: A skydiver jumps from (5.000x10^3) m with no parachute into a giant net. The mass of the skydiver is…

A: Given data: Mass of skydiver = m = 1.05 x 102 kg = 105 kg Projected Area = A = 0.45 m2 Pressure = P…

Q: A new car is introduced and has a drag coefficient of 0.30 and a frontal area of 1.95 sqm and is…

A:

Q: A body travels through 60° standard air at 60 mph, and 5.5 hp is required to maintain this speed. If…

A:

Q: A circular sign has a diameter of 50 cm and is subjected to normal winds up to 150 km/h at 10°C and…

A: Before solving we have to make some assumptions as follows: The flow of air is steady and…

Q: An airplane with a NACA 662-215 airfoil cruises at 170 m/s at an altitude of 4550 m. The airfoil has…

A: Velocity = 170 m/s Altitude = 4550 m Aspect ratio = 9 Span length = 30 m Angle of attack = 2

Q: , A small aircraft has a wing area of 40 m2a lift coefficient of 0.45 at takeoff settings, and a…

A:

Q: A 17,000-kg tractor-trailer rig has a frontal area of 9.2 m2, a drag coefficient of 0.96, a rolling…

A:

Q: During a winter day, wind at 58 km/h, 5°C, and 1 atm is blowing parallel to a 3.5-m-high and…

A: Given : The velocity of the wind = 58 km/hr The temperature of the air T = 5°C The pressure of the…

Q: A 0.80-m-diameter, 1.2-m-high garbage can is found in the morning tipped over due to high winds…

A: Draw diagram of can when it is just to lift about point P, Given

Q: An airplane has a mass of 50,000 kg (without load), a wing area of 360 m2 , a maximum lift…

A:

Q: (a) A luxury sports car has a frontal area of 23.1 ft and a 0.24 coefficient of drag at 80 mph. How…

A:

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

A:

Q: An airplane has a total mass of 35,000 kg and a wing planform area of 65 m2. The airplane is…

A: Given: the velocity of the plane, V=1100 km/h=1100×10003600=305.556 m/s Ballance the lift force with…

Q: ler angles of attack, which is associated wi Diffuser effect Дифузорно течение O a decrease in Lift…

A: Solution ;

Q: What is flow separation? What causes it? What is the effect of flow separation on the drag…

A: Flow separation It is a process in which the boundary layer of the fluid detaches itself from the…

Q: 1.    Consider an light plane aircraft with a characteristic of: Wing area = 181 ft2 Aspect ratio =…

A: Solution: Given Data: A=181 ft2AR=6.2ηo=0.91W=3000 lbCD,o=0.027Pmax=345 hpηp=0.83V∞=100 ft/s   Note:…

Q: The drag coefficient of a vehicle increases when its windows are rolled down or its sunroof is…

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

Q: - Use FoilSim to investigate how an aircraft wing produces lift and drag by changing the values of…

A: An airfoil produces lift by applying a downward constrain on the air because it flows past.…

Q: b) Figure Q1(b) shows a smooth flat plate that is 150 mm wide and 500 mm long placed longitudinally…

A: Drag force: The drag force is the force acting opposite to the direction of fluid flow. Due to its…

Q: Boeing 767-400ER model airplane has two engines. Each engine can have a maximum thrust (mechanical…

A:

Q: The manufacturer of a car reduces the drag coefficient of the car from 0.38 to 0.33 as a result of…

A: Given data: The initial drag coefficient, cd1 = 0.38. The final drag coefficient, cd2 = 0.33. The…

Q: How does the Reynolds number effect the lift and drag coefficient for a symmetrical airfoil

A:

Q: Use FoilSim to investigate how an aircraft wing produces lift and drag by changing the values of…

A: Given Foilsim To find Lift and drag conditions

Q: You're flying a plane with a max speed of 267 ft/s and a wing area of 175ft^2 and a lift coefficient…

A: Solution: Given Data: v = 267 ft/sA=175 ft2CL=0.205W=2000 lbsH=5000 ftρ5000 ft=0.002048 slug/ft3

Q: A person is driving his motorcycle at a speed of 90 km/h in air at 20°C. The frontal area of the…

A: Given: The speed of motorcycle is V=90 km/h. The temperature of air is T=20°C. The frontal area of…

Q: Calculate lift, drag and (T/W) for an aeroplane with velocity 500 m/s, wing area 45 m2 , a drag…

A: Given, V = 500 m/s A = 45 m2 CD = 0.05 CL = 0.9

Q: 3) An advertising sign mounted on the roof of a car is 33 inches tall, 15 inches wide and 54 inches…

A:

Q: a. What is a favorable pressure gradient? What is an adverse pressure gradient? b. What is boundary…

A:

Q: An airplane is consuming fuel at a rate of 7 gal/ min when cruising at a constant altitude of 10,000…

A: Take the following assumptions. Standard atmospheric conditions exist. The settings of the plane…

Q: n aircraft has the drag polar, C_d=0.015+0.05C_l^2 For a lift coefficient of 0.5, find the value of…

A: Given:Drag polar, Cd=0.015+0.05Cl2Lift coefficient, Cl=0.5

Q: What is induced drag on wings? Can the induced drag be minimized by (1) long and narrow wings or (2)…

A: Given question? What is induced drag on wing?  Can it be minimized by wing shape?

Q: Explain the causes of Lift and Drag on the illustration below:

A: The component of the aerodynamic force that is perpendicular to the flow direction is known as…

Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.