The jet is traveling at a speed of 500 mi/h, 30o with the horizontal. If the fuel is being spent at 3 lb/s, and the engine takes in air at 400 lb/s, whereas the exhaust gas (air and fuel) has a relative speed of 32 800 ft/s, determine the acceleration of the plane at this instant. The drag resistance of the air is FD= (0.7v2) lb, where the speed is measured in ft/s. The jet has a weight of 15 000 lb. Hint: See Prob15-130.

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500 mi/h 30°