Determinação da aceleração gravitacional utilizando um pêndulo e o tracker

Abstract

The main goal of this work was to determine the modulus of the local gravitational acceleration g. To achieve this goal, we chose an experimental research approach, in which the actual movement of the pendulum was recorded and analyzed with the aid of Tracker software. Due to the small size and shape of the specimen (approximately spherical) in relation to the lengths of the wires, we chose to omit the moment of inertia, so we considered the analysis of the movement according to the simple pendulum theory. The experimental results showed good agreement with the theoretical value of g, with relative errors of less than 2%, and the graph relating the values of T² X L (squared period versus length) shows a linear trend, demonstrating the eficiency of the theoretical method chosen (the inclusion of the moment of inertia can be recommended for future experiments). According to the data obtained, it was possible to highlight the fundamental principles related to pendulum oscillatory movement, develop practical skills in recording and analyzing movement using Tracker software, and determine the value of the local gravitational acceleration.