The angular momentum \(L\) of the bob with reference to fixed point in space as well as the bob absolute rate of angular momentum \(\frac{dL}{dt}\) are calculated and displayed in vector form.
The instantaneous value of the system’s kinetic (red bar) and potential energy (blue bar) is illustrated graphically. Other options are available to help study this system in details.
The simulation was performed by finding the Lagrangian and constructing the 3 nonlinear equations of motion and solving them numerically using NDSolve.
The principal moments of inertia are used for the bob. The fixed point in space that was used to calculate \(L\) with respect to the point where the pendulum rod is attached to the frame.