Why Put Force on Springs Before Setting Zero Extension?

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SUMMARY

The discussion centers on the practice of applying a force to springs before setting the zero extension during physics experiments. Specifically, using a 50g hanger allows the spring to stretch slightly, establishing a baseline for measurements. This method is crucial as it ensures the spring is beyond its coiled state, entering the elastic limit, which affects the accuracy of spring constant calculations. Understanding this principle is essential for accurate data collection in experiments involving Hooke's Law.

PREREQUISITES
  • Understanding of Hooke's Law and spring constants
  • Familiarity with basic physics concepts at the AS level
  • Knowledge of measuring devices for load and extension
  • Experience with experimental design in physics
NEXT STEPS
  • Research the principles of Hooke's Law and its applications
  • Learn about the elastic limit and its significance in material science
  • Explore methods for accurately measuring spring extension and load
  • Investigate the impact of different weights on spring behavior
USEFUL FOR

This discussion is beneficial for AS level physics students, educators, and anyone conducting experiments involving springs and elastic materials. It provides insights into experimental techniques and the underlying physics principles necessary for accurate data interpretation.

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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