Stress-strain graph-finding elastic strain energy

  • Thread starter Krashy
  • Start date
  • #1
30
5

Homework Statement


stress-strain.png


Homework Equations


[/B]
stress = force/area
strain = extension/original length
Young modulus= stress/strain


The Attempt at a Solution



stress strain task.png

[/B]
Hi i hope you can read my handwriting. I solved task a already but even though i think i solved b correctly, the solution says its wrong. It states that its 45000 J. It could be a mistake in the book because its just off by one zero, but im not sure it could be a mistake in my calculation too. The force and the extension is apparently right according to the solution.
Thank you very much in advance.
 

Attachments

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Answers and Replies

  • #2
mjc123
Science Advisor
Homework Helper
1,230
642
I agree with your answer. Such mistakes in books are not uncommon, unfortunately.
 
  • #3
30
5
All right, thanks good to know i didnt miscalculated
 

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