A light truck weighs 3,300 lb and is rated at 30 miles per gallon for 52 mph highway driving on level ground. Under those conditions, the engine must overcome air resistance, rolling resistance, and other sources of friction. Give your answers in the units shown. (a) The coefficient of drag is 0.55 at 52 mph, and the truck's frontal area is 28 ft. What is the drag force on the truck? (Express your answer using three significant figures.) Ib (b) How much power must the engine produce at 52 mph just to overcome air resistance? (Express your answer using three significant figures.) |hp (c) In part (b) how much gasoline would be consumed each hour (neglecting other frictional effects)? (Express your answer using three significant figures.) V =[ ]gal

A light truck weighs 3,300 lb and is rated at 30 miles per gallon for 52 mph highway driving on level ground. Under those conditions, the engine must overcome air resistance, rolling resistance, and other sources of friction. Give your answers in the units shown. (a) The coefficient of drag is 0.55 at 52 mph, and the truck's frontal area is 28 ft. What is the drag force on the truck? (Express your answer using three significant figures.) Ib (b) How much power must the engine produce at 52 mph just to overcome air resistance? (Express your answer using three significant figures.) |hp (c) In part (b) how much gasoline would be consumed each hour (neglecting other frictional effects)? (Express your answer using three significant figures.) V =[ ]gal

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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A truck experiencing drag is able to reach a maximum velocity of v₁ = 30.5 m/s. It has cross-sectional area A₁ = 1.6 m^2 and coefficient of drag CD,1 = 0.86. The city is having a parade and you want to use your truck as a float. After fitting your truck with signs and posters, the new cross-sectional area is A₂ = 3.3 m^2, and the coefficient of drag has increased to CD,2 = 1.38. What is the new maximum speed of your truck? Give your answer to 1 decimal place. Assume the density of air is 1.204 kg/m^3 and does not change, and assume the accelerating force provided by the engine does not change. Backup link to image (opens in new tab). A₂
3.) Automotive engineers work very hard to improve the value of the drag coefficient for cars. Suppose you have a car with a mass of 3000. kg and an effective surface area of 4.00 m^2. The engine can generate a maximum force of 28,000. N. Let the coefficient of kinetic friction be 0.200, and the coefficient of static friction be 0.400. Air has a density of 1.21 kg/m^3. (back on earth) (3a) Draw a free-body diagram for your car, including both drag and friction, when the car is moving at its maximum velocity. (3b) If the maximum value of your car's velocity is 150.0 m/s, then what is the drag coefficient for the car? (3c) Suppose your engineers change the drag coefficient to 0.300 - what would be your maximum velocity then with the same force from your engine.
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Please include the diagram/plot
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Type here to search X The large, newly planted tree shown in the figure below is kept from tipping over in a wind by use of a rope as shown. It is assumed that the sandy soil cannot support any moment about the center of the soil ball, point A. Estimate the tension T in the rope if the wind is 75 km/hr. See the figure for drag coefficient data. 4x F2 4, # O DI » $ F4 U=75 km/hr DII % F5 Rope * 45 F6 A Scale drawing ☀ F7 & 2.1m PrtScn F8 Home F9 End 28°F Cloudy F10 POUP FI PgDn
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A NACA 2412 airfoil with a chord of 0.64m is flying in an airstream of standard sea level conditions. The freestream velocity is 70 m/s. Given the lift per unit span is 1,254 N/m. By using the experimental data for NACA 2412 data plot in Figure Q1c, investigatethe angle of attack of the airfoil and the analyze the value of drag per unit spanof the airfoil. Given that at standard sea level, ?=1.789×10-5 kg/m.s.
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.