... the spring will stretch for the single spring. The opposite of this happens when the springs are in series. When springs are in series, they are extended as normal as if they were single springs, so two single results will result in an extension that will be double what it would be with just one single spring. Hooke's law supports this as it suggests that the extension and the mass are in direct proportionality therefore double the load, double the extension, so this must mean half the stiffness. So, when the spring combinations are set up, the mass will be pulled down so that it oscillates. 10 oscillations will be measured by a using a stopwatch. I am measuring 10 oscillations instead of one because then the time will be more accurate as it is very difficult to measure one oscillation because it can be very fast and human reaction ...

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