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What affects the stretch of a spring? Planning Key factors- These are the things that vary and could affect my results. In this experiment they are- * The length of the spring- I would expect that a longer spring would have a longer extension then a shorter spring, so the length of the spring would affect the stretch of a spring. * The amount of weight added- I would expect, the more weight added to the spring, the longer the length of the extension, which would affect the stretch of a spring. * The material of the spring- I would expect that different metals or different alloys used could be at different weights, which would affect the stretch of a spring. * The diameter of the spring- I would expect that the greater the diameter of the spring the longer the extension of the spring, because it may have bigger corals in the spring, which would...

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