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ELASTIC BEHAVIOUR IN SPRINGS (2) Aim: To investigate the elastic behaviour in a spring placed under a positive load (tension) and to calculate it's Spring Response. Apparatus: Tension spring Micrometer screw gauge Lloyd's Tensile machine Method: A Tension spring was taken and a micrometer screw gauge was used to measure the wire diameter and the coil diameter. These readings were recorded and the number of coils in the spring was also noted. The spring was then placed in a Lloyd's Tensile machine and extended by 5mm increments. The corresponding load values were noted. The experimental process was repeated until the extension reached 30mm. The extension was then reduced in 5mm stages back down to 0. At each interval the load values were recorded. The findings were tabulated and a graph was plotted for load vs extension. Results: Number of coils = 18 Wire diameter = 0.0034 m Coil diameter = 0.044 m Table 1 Extension Spring results LOADING UNLOADING Load /N Extension /mm Load /N Extension /mm 0 0 0 0 4.8 5.096 5.4 5.956 9 10.28 10.8 12.08 13.8 15.21 15.6 17.79 17.9 20.09 20.5 23.84 21.5 25.02 26.3 30 ...

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