Question

PRACTICE IT

Use the worked example above to help you solve this problem. An airplane has wings, each with area 4.05 m², designed so that air flows over the top of the wing at 249 m/s and underneath the wing at 226 m/s. Find the mass of the airplane such that the lift on the plane will support its weight, assuming the force from the pressure difference across the wings is directed straight upwards.

Your response differs from the correct answer by more than 10%. Double check your calculations. kg

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Approximately what size wings would an aircraft need on Mars if its engine generates the same differences in speed as in the "Practice It" and the total mass of the craft is 450 kg? The density of air on the surface of Mars is approximately one percent Earth's density at sea level, and the acceleration of gravity on the surface of Mars is about 3.8 m/s².
m²

Answer 1

Area A beruauli prins ple P,h, -Peghev, + V 225) (249- 226') P,e ) P, P,665625 N/2 (-A 271 c c.222 N. Lift for e Grav.fonu n plame Fs = mg Ln equibrim, F- F g (P-9I)A ms of pne m = 27 00822 2762.6 kg kg/m 450 kg =1225 メ U,249 ms, Vr = 226 m l PhP,e, ) -9156 25 N/m レらじメ3.2 25.55 m E6915625