Monday, May 30, 2016

Contributions from Indonesia, Tracker resources on 5 Rolling Cylinders

Contributions from #Indonesia, Tracker resources on 5 Rolling Cylinders. many thanks to Eka Cahya Prima for sharing! It is so wonderful to know the people around the world all want to benefit more people through their research.
email of willingness to share, permission is granted to share on OSP@SG

Title of his paper.
Kinematics investigations of cylinders rolling down a ramp using tracker
Eka Cahya Prima1,2,*, Menurseto Mawaddah1, Nanang Winarno1 andWiwin Sriwulan3
VIEW AFFILIATIONS
* Corresponding author: ekacahyaprima@upi.edu
AIP Conf. Proc. 1708, 070010 (2016); http://dx.doi.org/10.1063/1.4941183
Conference date: 17 October 2015
Location: Bandung, Indonesia

Another paper that suggests Tracker is applicable to physics education!


Nowadays, students’ exploration as well as students’ interaction in the application stage of learning cycle can be improved by directly model real-world objects based on Newton’s Law using Open Source Physics(OSP) computer-modeling tools. In a case of studying an object rolling down a ramp, a traditional experiment method commonly uses a ticker tape sliding through a ticker timer. However, some kinematics parameters such as the instantaneous acceleration and the instantaneous speed of object cannot be investigated directly. By using the Tracker video analysis method, all kinematics parameters of cylinders rolling down a ramp can be investigated by direct visual inspection. The result shows that (1) there are no relations of cylinders’ mass as well as cylinders’ radius towards their kinetics parameters. (2) Excluding acceleration data, the speed and position as function of time follow the theory. (3) The acceleration data are in the random order, but their trend-lines closely fit the theory with 0.15% error. (4) The decrease of acceleration implicitly occurs due to the air friction acting on the cylinder during rolling down. (5) The cylinder’s inertial moment constant has been obtained experimentally with 3.00% error. (6) The ramp angle linearly influences the cylinders’ acceleration with 2.36% error. This research implied that the program can be further applied to physics educational purposes.

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