3. A truck has a drag coefficient based on frontal area of CD = 0.86. The truck has a mass of 12,750 kg anda frontal area of 10.5 m2. If the truck is traveling at constant speed on a level road, the forces retarding itsforward progress are the drag and the rolling friction. The force due to rolling friction can be written asFit Wfr(1+VV₁where V is the truck speed in m/s, Vo = 30 m/s and fr (the coefficient of rolling resistance) is approximately0.008 for a truck on concrete or asphalt. Plot the total power the engine must supply as a function of truckspeed, V. Comment on the relative importance of drag and rolling friction in the fuel consumption of thetruck.

1. Calculate the force due to rolling friction using the given formula: Frf=Wfr(1+V0V)…

Answered: 3. A truck has a drag coefficient based…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The drag equation for the Gofaster 172 is: D = 0.0003v2A. D is drag in pounds; v is airspeed in feet/second; and A is aircraft frontal area in square feet. At maximum airspeed, D = 140 lbs. How much does max airspeed INCREASE if the fuselage is narrowed such that frontal area A is reduced from 16 ft2 to 14 ft2? Give the answer in ft/sec AND mph. drag is 140 lbs. at maximum airspeed, regardless of frontal area. the question is: what is the INCREASE in max airspeed, not what is the max airspeed.
The large block shown is x = 72 cm wide, y = 54 cm long, and z = 9.0 cm high. This block is passing through air (density of air p = 1.43 kg/m³) at a speed of v = 8.61 m/s. Find the drag force F41 acting on the block when it has the velocity vj and a drag coefficient I = 0.812. V2 Fa.1 N %3D Find the drag force F42 acting on the block when it has the velocity vz with a drag coefficient I = 0.893. F42 N Find the drag force Fa.3 acting on the block when it has the velocity vz with a drag coefficient I = 1.06. F4.3 = N EN
The drag polar equation of a light airplane in clean configuration can be written as Cp = 0.358 + 0.0405 C₁². It has a weight of 18,681 N. The wing area is 14.41 m². Calculate the minimum power required in watts. (Round off answer with no decimal places, No units, No commas) Answer given: 1461792 A 5,000 lbs. aircraft has an excess power of 75 hp at sea level. If the service ceiling is 3,657.6 m, determine the time to climb from sea level to absolute ceiling in minutes. (Round off answer with no decimal places. No units, No commas) Answer given: 17
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The figure shows two cables AB and AC. Using the tabulated values for the parameters, calculate the magnitude of the projection of FAC onto AB. Also, determine the angle 0 formed by BAC. NOTE: the magnitude of the projection may be positive or negative (or zero). Also, point C lies on the y axis. В L6 FAB A L2 FAC y L3 X 2021 Cathy Zupke parameter value units 3 m L2 L3 L4 3 m 3 m 1 m 3 L6 FAB 2 80 N FAC 100 The magnitude of the projection of FAC on AB is N The angle AB makes with AC is 0-
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A truck has a drag coefficient based on frontal area of CD = 0:86. The truck has a mass of 12,750 kg and a frontal area of 10.5 m2. If the truck is traveling at constant speed on a level road, the forces retarding its forward progress are the drag and the rolling friction. The force due to rolling friction can be written asFrf = W*fr(1 + V/V0)where V is the truck speed in m/s, V0 = 30 m/s and fr (the coe¢ cient of rolling resistance) is approximately 0.008 for a truck on concrete or asphalt. Plot the total power the engine must supply as a function of truck speed, V . Comment on the relative importance of drag and rolling friction in the fuel consumption of the truck.
3-A vehicle is moving at 90 km/h at an air temperature of 20 °C (the density of air at this temperature is 1.204 kg/m3). The front view area of the vehicle is 3.2 m2. If the drag force acting in the flow direction of the vehicle is 175 N, what is the drag coefficient?
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2. The table below shows experimental data for the shape and pressure distribution on the upper and lower surface of an airfoil at zero angle of attack. X 0 0.25 0.5 0.75 1 Y Fx = Yu 0 0.0952 0.0922 0.0588 0 (Pu dYu dx - Calculate the drag and lift force on the airfoil by numerically evaluating the integrals Fy (P₁-P₂)dx = √ ( P₁ - 1 Pi Y₁ 0 -0.0254 -0.0144 -0.0052 0 dv) Y = Yu (x) dx y = Ye (x) Pu 1.000 -1.640 -0.786 -0.212 0 x Pi 1.000 0.589 0.426 0.322 0 Use finite difference approximations of the derivatives and the composite Simpson's rule to evaluate the integrals. Hint: Use central differences to estimate the derivatives wherever possible since they are more accurate than forward or backward differences.
A cloud of coal particles is traveling through a system. The cloud diameter estimated to be 0.027 m and the individual particles are 50 um in diameter with the density of 1300 kg/m'. The total cloud is moving such that its drag coefficient is constant at 0.44. The individual particles in the cloud move much slower, such that the drag coefficient given by stock's law. The system has atmospheric air transporting and the cloud density is 190 kg/m3. Determine the ratio of internal velocity to cloud velocity. Atmospheric air density 1.2 kg/m'.

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