Exam-style question
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Evaluate a student answer to Distinguish Elastic Deformation From Plastic Deformation: what must be included for full A-Level credit?.
Model answer
What a good answer should say
- Evidence Trace response d8b5db: state Distinguish elastic deformation from plastic deformation., apply resultant vector, momentum conservation, impulse, Hooke law, stress, and finish with the physical consequence for Materials.
Explanation
Why this works
Stem being answered: Evaluate a student answer to Distinguish Elastic Deformation From Plastic Deformation: what must be included for full A-Level credit? Route focus: mechanics-and-materials / Materials.
Key vocabulary for this item: distinguish, elastic, deformation, plastic. Written check: state the principle, apply it to the named context, and close with the requested conclusion.
The explanation should keep the answer tied to these exact words rather than a general physics summary, using units, graph evidence or equation reasoning only when they are relevant to the stem.
Common mistake
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