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Physics (AS & A Level) · Oct / Nov 2016 · Paper 12 · Question 22

9702Stress and strain

Four solid steel rods, each of length 2.0 m and cross-sectional area 250 mm2, equally support an object weighing 10 kN. The weight of the object causes the rods to contract by 0.10 mm. What is the Young modulus of steel?

  1. A2.0 × 10^8 N m–2
  2. B2.0 × 10^11 N m–2
  3. C8.0 × 10^8 N m–2
  4. D8.0 × 10^11 N m–2

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Correct answer: B. 2.0 × 10^11 N m–2

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