Stresses in the rods of a framework — A/L Combined Mathematics

How do I practise Stresses in the rods of a framework?

1 question with a worked solution

1. In the analysis of a pin-jointed light framework in static equilibrium, how is a member designated when it exerts an outward pushing force against the joint pins at its ends?
   1. A) A neutral cantilever
   2. B) A tie under tension
   3. C) A shear pin
   4. D) A strut under compression (thrust)
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   Correct answer: D) A strut under compression (thrust)

   A framework member under compression is squeezed by external joint forces and consequently pushes outward on the joint pins to maintain equilibrium; such a member is called a strut (bearing thrust). A member pulled by joint pins is a tie (bearing tension).

   Show worked solution

   Step 1: Compression pushes outward against joints -> Strut (thrust). Step 2: Tension pulls inward on joints -> Tie (tension). Answer: A strut under compression (thrust).
   Modelled on: the A/L Combined Mathematics examination pattern

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Where does Stresses in the rods of a framework fit in the syllabus?

Year 2 · Term 2