I created this thread in the physics forum as well but I think some Engineers of TSR may also be able to help as Young's modulus is a calculation that is heavily used in engineering. So I've just copied and pasted from my previous thread. Any help at all would be greatly appreciated.
So I'm doing a project for my advanced higher physics and one of the ways I have used to calculate Young's modulus of a mild steel wire is by Searle's method. I have already calculated it using the equations stress/strain but in my instructions sheet it told me to plot mass(x-axis) against change in length(y-axis) which I have done and it says that the gradient of the graph can also be used to calculate Young's modulus. The units I used for mass were kg and for change in length it was mm. Can anyone help me with calculating it by using the gradient of the graph ? And also should it be mm on the y-axis or something different because my gradient was like 0.161 which seems way too small a value to be used for a calculation. Cheers.
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Has yours come through yet?