Question

Consider an airplane with a jet engine attached to the tail section that expels combustion gases at a rate of 18 kg/s18 \mathrm{~kg} / \mathrm{s} with a velocity of V=300 m/sV=300 \mathrm{~m} / \mathrm{s} relative to the plane. During landing, a thrust reverser (which serves as a brake for the aircraft and facilitates landing on a short runway) is lowered in the path of the exhaust jet, which deflects the exhaust from rearward to 120120^{\circ}. Find (a)(a) the thrust (forward force) that the engine produces prior to the insertion of the thrust reverser and (b)(b) the braking force produced after the thrust reverser is deployed.

Solution

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Answered 1 year ago
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Given Data

Mass flow Rate of exhaust gases

m˙=18kg/s\dot m = 18\,\,{\rm{kg/s}}

Velocity of exhaust gases

V=300m/sV = 300\,\,{\rm{m/s}}

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