395_Dynamics 11ed Manual

395_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 15 Ar 1 ρ = t m e d d r 2 A + = Br 2 A + = Forces T and F D are incorporated as the last two terms in the equation, F D v e Bv j A = F D 11.5 kN = Problem 15-131 The jet is traveling at speed v , angle θ with the horizontal. If the fuel is being spent at rate r 1 and the engine takes in air at r 2 whereas the exhaust gas (air and fuel) has relative speed v e , determine the acceleration of the plane at this instant. The drag resistance of the air is F D = kv 2 The jet has weight W . Hint: See Prob. 15-130.
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