# Hooke's Law Graphs

## Homework Statement

http://i568.photobucket.com/albums/ss125/NakedNoodles08/GraphsandData-1.jpg

Hello Physics Forums, i stumbled upon you guys when i stumbled within my physics work. The problem i am to put forth revolves around Hooke's law. I am conducting an experiment on Hooke's Law (although we have not learnt it yet, hence there are no links to such information), the experiment revolves around the testing of a spring and elastic band for similarities between their forces versus extensions. The write up is only 600 words maximum in length, and includes a data analysis, discussion (validity, accuracy and reliability of measurements) and error analysis.

My problem revolves primarily around the graph shapes, which we are to compare. I have uploaded images of both, and as one can see the spring graph is very deformed and the elastic band graph behaved in a more than normal elastic manner? I am quite new to physics prac write ups and would be very thankful for any of your knowledgeable advices.

## Homework Equations

Weight in the data was used as 9.8 for the force calculations
Extension is measured from the head to base of the spring and rubberband

## The Attempt at a Solution

I have attempted to draw a line of best fit on both graphs, and i think both are quite correct. However, i cannot come to decipher the spring graph, the vast majority of the student's graphs were a straight line (however i was awarded the extremely stretchy spring - making readings difficult with the bounce). The elastic band graph is very straight, and behaved more so like a spring would.

If anyone could help me with my problems i would have a great appreciation. Really am stuck on the graphs and cannot find any possible explanation for the spring shape, two anomalies is out of the question?