Galileo observed free-fall motion and estimated the magnitude of g in the late 1500s1; free-fall experiments continue to be widely used for measuring g in secondary school and university experiments.2 In addition, g can be calculated by measuring the period of motion of a single pendulum and using the relevant expression.3
In this study, the magnitude of g was estimated using two methods: by measuring the change in water level in a tank as water was ejected through a valve in the side and by measuring the distance to the point at which the ejected fluid arrived and using Bernoulli’s equation. The purpose of this study is to obtain formulas to estimate g from the slope of a graph of experimentally measured data, and to provide a new experimental method that allows high school or college-level students to measure g hydrodynamically with relative ease. It is...