  We present experimental data of the motion of a rimmed checker's piece on a
polished horizontal tray, in two specific conditions: with the substrate
harmonically shaken at 20 Hz, and with a static substrate. The latter
experiment immediately yields the dynamic friction coefficient. The harmonic
experimental results are very sensitive on the static friction coefficient,
which is not even a percent higher than the dynamic one. Due to the low
harmonic acceleration of the driver, the static friction has enormous influence
on the slider's motion. We modeled the slider's motion using a discrete
Markovian progression model, which at every discrete time-step chooses between
a sticking attempt and a return to the non-sticking trajectory. The present
model does not take into account the driver's acceleration. In the final
section, we explain the physical origin of walk-off, in case of periodic but
asymmetric driving.
