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Assertion (A): Summing the reactions is a worthwhile check on any structural model.

Reason (R): The reactions must equilibrate the applied loads.

Select the correct answer from the options below.

  • A.A is true but R is false
  • B.A is false but R is true
  • C.Both A and R are true, and R is the correct explanation of A
  • D.Both A and R are true, but R is not the correct explanation of A

Answer: C

Both statements are true and the second is the reason for the first. It is the cheapest check available and catches misapplied loads, unit errors and unintended restraints, all of which are common and none of which the solver will report.

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