A-LevelPhysicsDeformation of solidsOct/Nov 2021Paper 1 Q221 Mark
A length of metal wire is attached to a fixed point and hangs vertically. Masses are then suspended from the wire. Assume that the cross-sectional area of the wire remains constant. [Figure 22.1] A stress-strain graph for the wire is plotted, as shown. [Figure 22.2] What is represented by the shaded area under the graph?
Astrain energy in the wire
Bstrain energy in the wire / cross-sectional area of the wire
Cstrain energy in the wire / original length of the wire
Dstrain energy in the wire / original volume of the wire
✓ Correct Answer
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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