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Lab Report " Spring Extension

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Lab Report – Spring Extension

Question/Aim: What happens to the extension of the spring when the amount of the force is changed?

Hypothesis: The heavier the force to extend the spring then the extension of the spring will increase.


MV – amount of forced added

RV – the extension of the spring

CV – spring, ruler, the way the extension of the spring is measured.


  • spring
  • retort stand


  • weights (100g = 1N)
  • ruler
  • g-clamp


  • meter stick
  • safety goggles


I am going to test what happens to the extension of the spring if more weights are added each time and then analysis if the extension of the spring changed.


  • Firstly gather all the necessary equipment.
  • Measure the original length of the spring in order to later see the change that took place.
  • Then begin by hanging the spring on the retort stand.
  • Add 100g and measure the extension of the spring. Continue adding 100g each time and measure the extension, then record your results.


  • When adding up to 800g it is acceptable to leave the retort stand on the table but if more then 800g are added then fasten the retort stand to the table using a g-clamp and then let the weights hang off the table. (Remember to hold the weights and slowly let the extension of the spring extend).
...read more.


  • Also when adding more then 800g it is best to wear safety goggles so that in case the spring breaks then your eyes will be protected. (If the ruler is not able to measure the length of the extension then use a meter stick).



For this experiment 100g = 1N

Amount of Weight added to the spring (grams)

Length of the spring extension (cm)

100g (1N)


200g (2N)


300g (3N)


400g (4N)


500g (5N)


600g (6N)


700g (7N)


800g (8N)


900g (9N)


1000g (10N)


1100g (11N)


...read more.



700g (7N)


800g (8N)


900g (9N)


1000g (10N)


1100g (11N)


Result table on paper attached.


My hypothesis was “The heavier the force to extend the spring then the extension of the spring will increase.” After investigating this I found out that the hypothesis to this investigation is correct. This is proven by the results because when a weight of 100g was added the extension of the spring was only 3.25cm but when a weight of 1100g was added the extension of the spring was 49.75cm.

If I was to redo this investigation then I would make sure that I measure the extension of the spring accurately because sometimes during the measuring the spring would move and it was difficult to get the exact measurement.

...read more.

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