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Homework Statement
Please refer to the image attached.
I don't understand why can they just take 1.8m as the original length, since there is already a load hanging there.
My calculations yield the value of strain to be e/L, but in the answer it is e/1.8.
Please explain this to me.
Homework Equations
E=stress/strain
The Attempt at a Solution
My working is together with the question.
Attachments

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