K1

10 oscillations

10 points on S1-S2, 10 on S3-S4 - 5 cm between holes

times for S1-S2 (seconds):

S10 - 1.62s, 1.614s, 1.64s, 1.614s, 1.604s
S11 - 1.578s, 1.58s, 1.593s, 1.581s, 1.573s
S12 - 1.537s, 1.544s, 1.546s, 1.543s, 1.556s
S13 - 1.533, 1.526, 1.536, 1.53, 1.531
S14 - 1.527, 1.535, 1.534, 1.522, 1.52
S15 - 1.549, 1.554, 1.548, 1.544, 1.553
S16 - 1.611, 1.63, 1.612, 1.641, 1.625
S17 - 1.815, 1.814, 1.814, 1.816, 1.81
S18 - 2.228, 2.24, 2.24, 2.22, 2.229
S19 - 3.999, 3.956, 3.97, 3.986, 3.975

times for S3-S4 (seconds) - must invert to get the right graph shape:

S30 - 1.624, 1.67, 1.62, 1.613, 1.612
S31 - 1.567, 1.583, 1.576, 1.595, 1.591
S32 - 1.553, 1.556, 1.554, 1.554, 1.558
S33 - 1.524, 1.536, 1.527, 1.526, 1.54
S34 - 1.529, 1.531, 1.531, 1.532, 1.531
S35 - 1.557, 1.562, 1.571, 1.558, 1.568
S36 - 1.647, 1.634, 1.64, 1.64, 1.64
S37 - 1.812, 1.82, 1.822, 1.816, 1.821
S38 - 2.257, 2.26, 2.271, 2.274, 2.263
S39 - 4.053, 4.05, 4.04, 4.038, 4.024