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We report on this work on the use of the Excel datasheet for data acquisition and analysis in a classroom physics laboratory, particularly for measurements of time intervals. The data acquisition system is connected to the digital game port of a PC sound card. The optical system uses infrared sensors while an Excel macro reads the digital entrance (with a specific DLL archive). Two didactical experiments are illustrated: a damped pendulum and a rotating top. Freeware datasheets constructed by us are available on the Web.

Usando o Excel para medidas de intervalo de tempo no laboratório de Física