Why Put Force on Springs Before Setting Zero Extension?

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In a physics coursework experiment involving springs, it is important to establish a baseline for measurements by applying a small weight, such as a 50g hanger, to determine zero extension. This practice helps account for the initial tension in the spring when it is coiled, ensuring accurate readings once the spring enters the elastic limit. Understanding the attachment method and measurement techniques is crucial for reliable data collection. Additional resources on spring mechanics can enhance the theoretical background for the experiment. Overall, the discussion emphasizes the significance of proper setup and preliminary force application in spring experiments.
Mark Neilan
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Hey,
I am doing coursework for physics (AS level a bit like high school in US) in which we stretched springs in a variety of ways and gathered data and calculated spring constants. As part of the mark scheme i should do extra research into the theory behind the results. It was suggested that I find out why when doing the experiment it was best to put on the 50g hanger and let the spring stretch a little and put this as zero extension. I searched a lot for the answer but it is hard to get such specific information out of a search engine.
Does anybody know why some force is put on and then it is set as zero? I guess it acts differently when completely coiled up and takes a bit to enter the elastic limit. Does anybody know of any good sites or even books on the subject (i don't want to go too deep of course as its just a bit on the side for extra marks)?
Thanks very much.
 
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Things to think about:

How is your spring attached at the ends?
How are you measuring your extension and load?
 
OK thanks for the help. I got some help from a friend as well.
 
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