Física experimental com Arduino: velocidade do som em metais e o módulo de Young

Abstract

The popularization of technologies and increasingly easy access to information have allowed Physics teachers to build more elaborate educational experiments at a relatively low cost. It is currently possible to develop data collection and processing systems with relatively little investment in equipment. In this work, we propose the construction of an experimental apparatus, using the Arduino platform, together with sensors and 3D printed parts to measure the speed of sound in metals and, from this speed, determine the modulus of elasticity (Young’s modulus) of the material. The experimental apparatus proposed here proved to be viable for measuring the speed of sound in metals. The results obtained in the experiment showed that the experiment allows measuring the speed of sound in metals with a margin of error of less than 28%, thus becoming an accessible alternative to the traditional methods implemented. The use of low-cost experiments, such as the one developed in this work, enables the democratization of experimental teaching of sound waves at secondary and higher education levels, as well as the insertion of free technologies for training students for an increasingly demanding world regarding the use of new technologies and automation.