3. 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 as Fit Wfr(1+ V V₁ where V is the truck speed in m/s, Vo = 30 m/s and fr (the coefficient 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 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 as Fit Wfr(1+ V V₁ where V is the truck speed in m/s, Vo = 30 m/s and fr (the coefficient 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.
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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Transcribed Image Text:3. 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 as
Fit Wfr(1+
V
V₁
where V is the truck speed in m/s, Vo = 30 m/s and fr (the coefficient 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.
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