We present in this work a low-cost device for measurements of time intervals, velocities and acelerations, useful in the free-fall problem and others experiments in mechanics. We have constructed a homemade photogate using the PC gameport to make data acquisition and to obtain the acceleration of gravity. We have obtained good agreement of the experimental data and theoretical model of a free falling body. Our work provide a way to measure short time intervals with good accuracy, and open new possibilities of applications in physics teaching. Copyright by the Sociedade Brasileira de Física.
CITATION STYLE
Dionisio, G., & Magno, W. C. (2007). Photogate de baixo custo com a porta de jogos do PC. Revista Brasileira de Ensino de Fisica, 29(2), 287–293. https://doi.org/10.1590/s0102-47442007000200014
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