A-LevelPhysicsDeformation of solidsMay/June 2014Paper 1 Q191 Mark
A sample of metal is subjected to a force which increases to a maximum value and then decreases back to zero. A force-extension graph for the sample is shown. [Figure 19.1] When the sample contracts it follows the same force-extension curve as when it was being stretched. What is the behaviour of the metal between X and Y?
Aboth elastic and plastic
Bnot elastic and not plastic
Cplastic but not elastic
Delastic but not plastic
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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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