The goal is to measure the spring constant of a spring and then calculate a theoretical period of the oscillation and compare the results to a real life measurement. Extension of spring A: Neutral: 52 cm 1 N: 41 cm 2 N: 30 cm F = kx k = 9.1 N/m 10 oscilliations = 9.26 seconds Calculating the theoretical period for 2 newton: t=2pi*sqrt(m/k) t=2pi*sqrt(2/9.1)=2.9 which is completely wrong compared to the real life result. If i set k to 91 instead of 9.1 the resulting period is 0.93, much closer to reality. Have I botched up the units along the way or what have I done wrong? I'd be very greatful for help.