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| style="height:20px; width:200px; text-align:center;" |A [[diagram]] of the [[apparatus]] used to investigate the effect of a [[force]] on the [[extension]] of a [[Coil Spring|spring]].

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#Repeat steps 2-4 up to around 6N.

#Plot a [[graph]] with the [[force]] of [[weight]] on the [[y-axis]] and the [[extension]] on the [[x-axis]]. The [[gradient]] of this [[graph]] will be the [[Spring Constant|spring constant]] of the [[Coil Spring|coil spring]].

====Improving [[Accuracy]]====

: Calculate the [[weight]] added by [[measure|measuring]] its [[mass]] each time and using the equation <math>W=mg</math> with <math>g=9.8</math>. This will give a more [[accuracy|accurate]] knowledge of the [[weight]] rather than relying on the number printed on the [[weight]]s.