Exam-style question
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What happens to the force-extension graph of a material once it reaches its elastic limit?.
- A.It becomes linear
- B.It becomes horizontal
- C.It curves and does not return to the original position
- D.It becomes vertical
Model answer
What a good answer should say
- It curves and does not return to the original position
Explanation
Why this works
Once a material reaches its elastic limit, it undergoes plastic deformation, meaning that the graph will curve and the material will not return to its original shape when the force is removed. This behavior is crucial in understanding material properties.
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