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How does the extension of two or more springs in series or parallel compare with the extension of one spring?

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Introduction

How does the extension of two or more springs in series or parallel compare with the extension of one spring? My aim is to find out the extension of a single spring compared with springs in series. I think that the springs in series will extend more than one spring. I think that the springs in series will extend twice as much as one spring. If the extension is x, therefore the load of one Newton on two springs would be 2x as the load of one Newton is on each spring and not shared. One spring is x, two springs in series give 2x as each spring feels the one Newton mass. The parallel share the mass with each feeling 0.5. Parallel is x/2 compared to one spring, x and nx in the series. I will keep this a fair test by keeping the length of each spring the same. ...read more.

Middle

I will make sure all obstacles are under the table and that all chairs are pushed in. I will also check that the apparatus is away from the edge of the desk. Results Tables Single Spring Load Original Length New Length Extension Average (Newtons) (mm) (mm) (mm) (mm) Hanger 654 625 620 654 625 620 0 0 0 1 654 625 620 696 665 659 42 40 39 40.3 2 654 625 620 734 696 699 80 71 79 76.7 3 654 625 620 773 746 738 119 121 118 119.3 4 654 625 620 814 776 777 160 151 159 150 Series Spring Load Original Length New Length Extension Average (Newtons) (mm) (mm) (mm) (mm) Hanger 689 728 742 689 728 742 0 0 0 1 689 728 742 770 810 823 81 82 81 81.3 2 689 728 742 849 890 903 160 162 161 161 3 689 728 742 931 967 984 242 239 242 241 4 689 728 742 1015 1027 1064 326 299 322 315.7 From the evidence, I have noticed the series springs extend more than a single spring. ...read more.

Conclusion

There was a few things I could of changed that would of helped make my evidence more reliable, like I could of weighted the Newton weights to make sure they were exactly one Newton each. I could have used a straight hanger, as mine was slightly bent and this could have given me more accurate results. I feel the results were in sync with each other as I didn't change my hanger; therefore they were under the same conditions. All my results mainly support my conclusion although there were a few anomalies to deal with. There was one anomaly that stood out that was the extension of the series spring when the load was four Newton. I think I can account for it by feeling I misread the new length. If I was to repeat this experiment I would make sure all the Newtons were one Newton exact. That all my equipment was in pristine condition and able to be used to give accurate results, so I could support Hooke's Law sufficiently. Diane Smith Triple Yr 11 ...read more.

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