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The spanwise shear force distribution on a wing is obtained by

  • A.Integrating the net air load inward from the tip
  • B.Differentiating the bending moment twice
  • C.Multiplying the lift by the span
  • D.Taking the lift at the root only

Answer: A

Accumulating the distributed load from the tip towards the root gives the shear at each station, and integrating the shear in turn gives the bending moment. The net load already includes the relief from the wing's own mass and its fuel.

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