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The bending moment at a section of a beam is related to the shear force by

  • A.They are always equal
  • B.They are unrelated
  • C.Shear is the rate of change of moment
  • D.The bending moment is the rate of change of shear force

Answer: C

Differentiating the moment with respect to position along the beam gives the shear, and differentiating the shear gives the distributed load. The chain lets a whole loading diagram be built up by successive integration from the applied load.

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