A-LevelPhysicsDeformation of solidsMay/June 2020Paper 1 Q181 Mark
An elastic cord of unstretched total length 16.0 cm and cross-sectional area 2.0 × 10⁻⁶ m² is held horizontally by two smooth pins a distance 8.0 cm apart. The cord obeys Hooke's law. A load of mass 0.40 kg is suspended centrally on the cord. The angle between the two sides of the cord supporting the load is 60°. [Figure 18.1] What is the Young modulus of the cord material?
A5.7 × 10⁵ Pa
B1.1 × 10⁶ Pa
C2.3 × 10⁶ Pa
D3.9 × 10⁶ Pa
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The correct answer is C. This question tests the candidate's understanding of deformation of solids within the Physicssyllabus. The examiner's mark scheme requires...
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