For an airplane in flight, the average speed of the air relative to the plane is

Question

For an airplane in flight, the average speed of the air relative to the plane is 291 m/s below the wings and 320 m/s above the wings (see the figure below). The bottom of each wing has a surface area of 29.3 m2. Calculate the lift, which is the net upward force of air on the plane.

For an airplane in flight, the average speed of the air relative to the plane is 291 m/s below the wings and 320 m/s above the wings (see the figure below). The bottom of each wing has a surface area of 29.3 m^2. Calculate the lift, which is the net upward force of air on the plane.

Explanation / Answer

question For an airplane in flight, the average speed of the air relative to the plane is 316 m/s below the wings and 347 m/s above the wings (see the figure below). The bottom of each wing has a surface area of 29.2 m2. Calculate the lift, which is the net upward force of air on the plane. ans Total wing area = (29.2 x 2) = 58.4m^2. Pressure on bottom = 101,325Pa. (Assuming sea level atmospheric pressure) Pressure on top = (101,325 x 316)/347 = 92,272.91 Pa. Difference = (101,325 - 92,272.91) = 9,052.09Pa. Lift = (9,052.09 x 58.4) = 528,642.056N.

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