Why doesn't my force/ extension graph pass through the origin?





When F=ke is rearranged to fit into the equation for a straight line (y=mx+c), there is no value for c, so in theory there should be no y-intercept and the line should pass through the origin. In my graph, this is not the case.

Please could you give me an explination? It is not the first time I have calculated the extension of the wire and noticed this.

Why doesn't my force/ extension graph pass through the origin?hollywood theater

I think there must be something wrong with the way you are

1. plotting the results or

.2. collecting the data.

When there is NO LOAD then there cannot be any extension so it must pass through the origin.

Is it possibly that the wire is not taut before you apply the first mass?

You could check the diameter of the wire with a micro-meter gauge to see if there is any necking (shown by a decrease in the diameter).

Maybe you should give us your results so we can see what is happening. Remember Hooke's law states "within the elastic limit" you maybe exceeding it. Then Young's modulus applies.

Why doesn't my force/ extension graph pass through the origin?opera.com opera theater


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