Exam-style question
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A force-extension graph for a rubber band shows a curve after a certain extension. What does this indicate about the rubber band's behavior beyond this point?.
Model answer
What a good answer should say
- Beyond the limit of proportionality, the rubber band exhibits plastic deformation, meaning it will not return to its original length after the force is removed.
Explanation
Why this works
This answer is strong as it accurately describes the behavior of materials beyond their elastic limit, testing the ability to interpret force-extension graphs and understand material properties.
Common mistake
No common mistake is linked to this question yet.