Using a computer microphone port to study circular motion: proposal of a secondary school experiment

Abstract

In this work we present an inexpensive experiment proposal to study the kinematics of uniform circular motion in a secondary school. We used a PC sound card to connect a homemade simple sensor to a computer and used the free sound analysis software Audacity to record experimental data. We obtained quite good results even in comparison with the commercial PASCO PS-2103A motion sensor. We show that our experimental set up is suitable to perform experiments in secondary schools and allows the teacher to prove the relationship between angular velocity, the scalar one and the radius of the motion.

Measurement of Kinetic Friction Coefficient through Magnetic Induction Using Audacity Application in Physics Learning

“…The output of the recording using Audacity is in the form of audio files, either .wav, .aiff or .mp3 [9]. Audacity also functions to analyze the frequency of the recorded signal, search for the largest frequency record and record/detect EMF (Electromagnetic Field) signals [14][15][16][17][18]. Many experiments the data of which can be collected using Audacity, such as measuring Earth's gravitational acceleration [14], studying the Doppler effect [10], measuring the speed of sound [13], comparing the effects of factors in electromagnetic induction [15], experimenting resonance tube [11], and so on.…”