The short Foucault pendulum recently constructed by H. R. Crane, with a magnetic force field to compensate the intrinsic precession associated with small ellipticity, makes a natural exercise for the classical Poincaré perturbation theory.

This content is only available via PDF.
AAPT members receive access to the American Journal of Physics and The Physics Teacher as a member benefit. To learn more about this member benefit and becoming an AAPT member, visit the Joining AAPT page.