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In this investigation I am trying to find out how a spring behaves and if I double the ammount of springs I double the average extension pull.

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Introduction

Aim In this investigation I am trying to find out how a spring behaves and if I double the ammount of springs I double the average extension pull. Fair Test For a fair test I need to keep certain variable the same. These being: * The ammount of force used in Newton's. I will use three different forces 3N, 6N and 9N this is because these values are evenly spread this should give me reliable data and for every ammount of springs I will keep these values the same and only take readings from 3N, 6N, and 9N * The position of the ruler secured to the table. The ruler must be positioned at the beginning of the first spring this must stay the same or my results will not be reliable. * I will always make sure that the Newton metre reads 0 at the beginning of every test. The factor that I will be changing for the experiment is the number of springs used. Prediction I predict that as the force in Newton increases the extension (mm) ...read more.

Middle

* Newton metre * Springs - all springs are said to be identical this is soothe test is fair when adding on springs. * Clamp Diagram Method To start the investigation firstly I shall collect my apparatus. I will then set up the experiment according to the diagram. This is making sure that the ruler is in the correct position and the rest of my apparatus are secure using a clamp to secure the spring - this is important as under certain forces if the spring is insecure it could cause a safety hazard. I will make sure the force shown on the Newton Metre is always at 0 before every experiment. This is so the force it shows is that only of the extension of the springs. I will secure the ruler to the table using masking tape and position it so that the ruler starts at the beginning of the first spring. I will be stretching up to 6 springs and will repeat results for every spring. ...read more.

Conclusion

My Graph shows quite accurate lines of best fit and I can see that data has proved my prediction correct. Looking up at my results table with a force of 3N on 2 springs the extension showed 230mm then when the springs had doubled to 4 springs the extension showed 460mm it had also doubled. I have proved my prediction correct with a different example of it on my graph. Evaluation I am pleased with the overall experiment and feel the results collected proved my prediction effectively and were reliable. Looking at my graph and line of best fit I can see no odd results and feel I have accomplished the task set effectively. The results collected were that anticipated from my prediction. If I was to do the experiment again I may not be so lucky that my results are accurate and would test that the springs were identical unlike this time when we were just under the knowledge that the springs were meant to be identical. Also next time I may use more amounts of force instead of just 3N, 6N, and 9N using more numbers of force would give me a better spread of results. ?? ?? ?? ?? Stretching Springs Investigation ...read more.

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