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Prob. 15-1 15-142. The 12-Mg jet airplane has a constant speed of 950 km/h when it is flying along a horizontal straight line. Air enters the intake scoops S at the rate of 50 m/s. If the engine burns fuel at the rate of 0.4 kg/s and the gas (air and fuel) is exhausted relative to the plane with a speed of 450 m/s, determine the resultant drag force exerted on the plane by air resistance. Assume that air has a constant density of 1.22 kg/m³. Hint: Since mass both enters and exits the plane, Eqs. 15-28 and 15–29 must be combined to yield dv dm. dm; ΣF, - m Vple dt + vpli dt dt v = 950 km/h %24

Prob. 15-1 15-142. The 12-Mg jet airplane has a constant speed of 950 km/h when it is flying along a horizontal straight line. Air enters the intake scoops S at the rate of 50 m/s. If the engine burns fuel at the rate of 0.4 kg/s and the gas (air and fuel) is exhausted relative to the plane with a speed of 450 m/s, determine the resultant drag force exerted on the plane by air resistance. Assume that air has a constant density of 1.22 kg/m³. Hint: Since mass both enters and exits the plane, Eqs. 15-28 and 15–29 must be combined to yield dv dm. dm; ΣF, - m Vple dt + vpli dt dt v = 950 km/h %24

Elements Of Electromagnetics
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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Prob. 15-1 15-142. The 12-Mg jet airplane has a constant speed of 950 km/h when it is flying along a horizontal straight line. Air enters the intake scoops S at the rate of 50 m/s. If the engine burns fuel at the rate of 0.4 kg/s and the gas (air and fuel) is exhausted relative to the plane with a speed of 450 m/s, determine the resultant drag force exerted on the plane by air resistance. Assume that air has a constant density of 1.22 kg/m³. Hint: Since mass both enters and exits the plane, Eqs. 15-28 and 15–29 must be combined to yield dv dm. dm; ΣF, - m Vple dt + vpli dt dt v = 950 km/h %24
Transcribed Image Text:Prob. 15-1 15-142. The 12-Mg jet airplane has a constant speed of 950 km/h when it is flying along a horizontal straight line. Air enters the intake scoops S at the rate of 50 m/s. If the engine burns fuel at the rate of 0.4 kg/s and the gas (air and fuel) is exhausted relative to the plane with a speed of 450 m/s, determine the resultant drag force exerted on the plane by air resistance. Assume that air has a constant density of 1.22 kg/m³. Hint: Since mass both enters and exits the plane, Eqs. 15-28 and 15–29 must be combined to yield dv dm. dm; ΣF, - m Vple dt + vpli dt dt v = 950 km/h %24
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