Unofre B Pili
The sound of impacts made by the two outermost balls in a Newton's cradle were recorded with a smartphone sound sensor. As a time series of sound pressure levels, the data made it possible to obtain the period of the identical pendulums. Hence the determination of the acceleration due to gravity. The result, on average, g = 9.99 m s-2, is close enough to the locally accepted value of 9.78 m s-2 for instructional purposes. © 2021 IOP Publishing Ltd.
Department of Physics, University of San Carlos, Cebu City, 6000, Philippines
