Photograph of the experimental setup showing (1) smart phone, (2) glider, (3) air track, (4) spring, (5) photometer, and (6) the fixed end.
Close-up of the mobile phone screen showing an acceleration graph for free oscillations.
A fragment of the output data file of the Accelerometer Monitor application. The first three columns give the three acceleration components while the fourth column gives the elapsed time between measurements.
As an example of the experimental acceleration data (squares) and fitted curve (solid line) for mass 3.
Photograph of the smart phone displaying an acceleration graph for the case of damped oscillations.
Experimental acceleration data (squares) and fitted curve (solid line) for damped oscillations.
Parameters and their errors from fitting the acceleration data for free oscillations.
Comparison of periods calculated from the fit to accelerometer data (column 2) and obtained with a separate photometer measurement (column 3). The fourth column shows the percentage difference.
Data for the calculation of the spring constant.
Comparison of results for the measured spring constant: from a fit to the accelerometer results, by hanging a static weight, and the percent difference.
Parameters and their errors from fitting the acceleration data for damped oscillations.
Comparison of the relaxation time obtained from the measured damping constant, , with the relaxation time obtained from Eq. (3) .
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