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Mathics is a free, general-purpose online computer algebra system featuring Mathematica-compatible syntax and functions. It is backed by highly extensible Python code, relying on SymPy for most mathematical tasks.

MathWorldTM is the web's most extensive mathematical resource, provided as a free service to the world's mathematics and internet communities as part of a commitment to education and educational outreach by Wolfram Research, makers of Mathematica.

We follow Gerd Baumann's approach in Mathematica to determine the period of the mathematical pendulum. First, we write down the kinetic and potential energies: the kinetic energy is expressed in terms of the angular velocity and the moment of inertia for a point mass m suspended at distance l .

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