... shows the behaviour of all springs when a load is applied. Between points O and E the line of the graph is straight through the origin. But between points E and A the line is curved and declines this is because the spring has been stretched beyond its elastic limit and can no longer return to its previous rest state. OE = Stretching Force [image005.gif] Extension which means that the Force is directly proportional to the extension hence the line passing in s straight line through the origin Hooke's law stated that Extension a Stretching Force In my investigation I intend to investigate the extension of springs in parallel, varying in number when a fixed mass is applied. Information about the springs used in the experiment: Length of the coiled portion when closed 20mm Length of the coiled section is 60mm when a mass of 100g is attached. Max length ...

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