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# Young Modulus Watch

1. How does drawing a force extension graph help you fin the young modulus of a wire?
2. halp?
3. A force-extension graph can help you with Hooke's Law. The gradient of the line will give you the spring constant, k. You can use it for the Young Modulus by multiplying the gradient by the cross sectional area of the wire and the doing L/gradient(A)
I hope that helps!
4. (Original post by Saira_98)
A force-extension graph can help you with Hooke's Law. The gradient of the line will give you the spring constant, k. You can use it for the Young Modulus by multiplying the gradient by the cross sectional area of the wire and the doing L/gradient(A)
I hope that helps!
Thanks! so it's just one of those things?
5. (Original post by thefatone)
How does drawing a force extension graph help you fin the young modulus of a wire?
If you know the cross-sectional area of the wire you can divide the force by the area to work out the stress. E = stress/strain, or the gradient of the slope.
6. (Original post by thefatone)
Thanks! so it's just one of those things?
Yeah, if you have a stress/strain graph then the gradient is your Young Modulus

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