Select the incorrect statement for a flow over wings.(a) Induced drag comes from pressure- drag(b) Pressure imbalance makes D’Alembert’s paradox does not occur(c) 3D flow over wings cause induced drag(d) Induced drag is a ‘type’ of pressure- dragI got this question in an interview for job.My query is from Downwash and Induced Drag topic in division Flow over Airfoils over Finite Wing of Aerodynamics

Select the incorrect statement for a flow over wings.(a) Induced drag

1.	Select the incorrect statement for a flow over wings.(a) Induced drag comes from pressure- drag(b) Pressure imbalance makes D’Alembert’s paradox does not occur(c) 3D flow over wings cause induced drag(d) Induced drag is a ‘type’ of pressure- dragI got this question in an interview for job.My query is from Downwash and Induced Drag topic in division Flow over Airfoils over Finite Wing of Aerodynamics
Answer» The correct OPTION is (a) Induced drag COMES from pressure- drag Explanation: For a wing, 3D FLOW causes a pressure imbalance in the direction of FREE – stream velocity, which is the drag. Thus, induced drag is a type of pressure-drag. But it is not caused by pressure drag.

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