  The one-dimensional nonlinear oscillations of a magnet attached to a spring
and interacting with a set of magnets are analyzed theoretically and
experimentally. The equation of motion is solved numerically using the Euler
method in a spreadsheet. The temporal evolution of the position is obtained
using video analysis. The correspondence between the data and the predictions
of the model shows the potential of the tools employed. The simplicity of the
approach allows its application in the first university courses of experimental
Physics.
