ERIC Number: EJ1037482
Record Type: Journal
Publication Date: 2014-Jul
Abstractor: As Provided
Reference Count: 15
Determination of the Static Friction Coefficient from Circular Motion
Molina-Bolívar, J. A.; Cabrerizo-Vílchez, M. A.
Physics Education, v49 n4 p400-405 Jul 2014
This paper describes a physics laboratory exercise for determining the coefficient of static friction between two surfaces. The circular motion of a coin placed on the surface of a rotating turntable has been studied. For this purpose, the motion is recorded with a high-speed digital video camera recording at 240 frames s[superscript-1], and the videos are analyzed using Tracker video-analysis software, allowing the students to dynamically model the motion of the coin. The students have to obtain the static friction coefficient by comparing the centripetal and maximum static friction forces. The experiment only requires simple and inexpensive materials. The dynamics of circular motion and static friction forces are difficult for many students to understand. The proposed laboratory exercise addresses these topics, which are relevant to the physics curriculum.
Descriptors: Science Instruction, Physics, Science Laboratories, Laboratory Experiments, Scientific Concepts, Motion, Video Technology, Computer Software, Educational Technology, Technology Uses in Education, Science Experiments
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A