Oscillations bounded by the simple pendulum and the oscillating rigid   rod
  The oscillation periods bounded by a simple pendulum and an oscillating rigid rod are illustrated using a multiple pendulum. Oscillation periods between these two limits are obtained. A theoretical approach using the Lagrangian formalism and the set up of three simple experiments are presented in order to probe our approach. 
J C Zamora, F Fajardo and J-Alexis Rodriguez