A-LevelPhysicsDeformation of solidsMay/June 2021Paper 1 Q201 Mark
Two guitar strings are stretched by tensile forces. String X is stretched by a tensile force F that causes an extension x. String Y is stretched by a tensile force 2F that causes an extension 2x. The strings obey Hooke's law. What is the ratio strain energy in stretched string X / strain energy in stretched string Y?
A4
B2
C1/2
D1/4
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The correct answer is D. 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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