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Induced drag is also known by which alternative name?

  • A.Form drag
  • B.Wave drag
  • C.Interference drag
  • D.Vortex drag

Answer: D

Because the drag is created entirely by the trailing vortex system, it is commonly called vortex drag, and the two names mean the same thing. Form drag comes from pressure losses due to separation, wave drag from shock losses in compressible flow, and interference drag from the meeting of two bodies, so none of those is a synonym.

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