Open AccessRolling friction in a 3D printed stringless pendulum
Author(s) -
Christian Hänisch,
M. Ziese
Publication year - 2021
Publication title -
european journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 51
eISSN - 1361-6404
pISSN - 0143-0807
DOI - 10.1088/1361-6404/abf220
Subject(s) - physics , drag , rolling resistance , radius , ball (mathematics) , pendulum , dynamical billiards , exponential function , classical mechanics , mechanics , power law , turning radius , 3d printed , mathematical analysis , mechanical engineering , mathematics , thermodynamics , medicine , statistics , computer security , quantum mechanics , computer science , engineering , biomedical engineering
The motion of a billiard ball rolling on a 3D printed stringless pendulum was studied by video analysis. This allows for the measurement of the eigenfrequency as well as the coefficients of viscous drag and rolling friction. The stringless pendulum consisted of two circle sectors with variable distance, such that friction coefficients could be determined as a function of rolling radius. Rolling resistance decreases with increasing rolling radius, but does not follow a simple power law; instead the data suggest an exponential dependence.