Oscillations of a pendulum with the outflow of a liquid

Abstract

This paper describes the characteristics of a pendulum which consists of a container having a liquid and a thin rod. From the bottom of the container, the liquid is discharged as waterdrop. We investigated the effects of liquid discharged from the bottom of the container on oscillation of the system. The oscillation is measured by high speed camera while discharging liquid. While the period of the falling waterdrop was the same and twice the period of the pendulum, a growth of oscillation was observed.