Exam-style question
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A material has a Young modulus of 200 GPa and a tensile stress of 400 MPa. What is the tensile strain?.
- A.0.002
- B.0.02
- C.0.2
- D.0.0002
Model answer
What a good answer should say
- 0.002.
- the correct option
Explanation
Why this works
The correct answer is 0.002. This supports Calculate Young modulus from stress and strain.
in The Young modulus because it uses the required mechanics relationship directly. The other options are less suitable because they confuse a different force, motion, energy, momentum, or materials concept.
Common mistake
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