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# young modulus question help watch

1. ym is 0.17x10^12 and area is 18mm and length of wire is increased by 0.095%
how do u work out the stress?
2. Young modulus* strain
3. (Original post by Unnamed User)
Young modulus* strain
yh i know but i dont have length or extension
4. (Original post by wayezkhan)
yh i know but i dont have length or extension
You do have the extension - it's 0.095%. Note that it says the wire's length is increased by 0.095% - that's the extension.
5. I believe that the 0.095% is the strain as it tells you that the wire's length increased by that amount. I think this means that 0.095%= (Extension/Original length)*100. So in order to find the strain, you will have to divide 0.095 by 100, and then multiply this by the young's modulus
6. ohh that makes sense thanks
(Original post by -Phoenix-)
I believe that the 0.095% is the strain as it tells you that the wire's length increased by that amount. I think this means that 0.095%= (Extension/Original length)*100. So in order to find the strain, you will have to divide 0.095 by 100, and then multiply this by the young's modulus

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