Exam-style question
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A force-extension graph shows a linear relationship up to a certain point. What does this indicate about the material's behavior?.
Model answer
What a good answer should say
- The linear relationship indicates that the material obeys Hooke's law within the limit of proportionality, meaning the extension is directly proportional to the applied force.
Explanation
Why this works
This answer is strong because it clearly connects the graph's linearity to Hooke's law and the limit of proportionality, testing the understanding of material behavior under stress.
Common mistake
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