A-LevelPhysicsDeformation of solidsOct/Nov 2016Paper 1 Q221 Mark
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?
A2.0 × 10⁸ N m⁻²
B2.0 × 10¹¹ N m⁻²
C8.0 × 10⁸ N m⁻²
D8.0 × 10¹¹ N m⁻²
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The correct answer is B. This question tests the candidate's understanding of deformation of solids within the Physicssyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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