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Proposed Methods for Measuring the Kinetic Frictional Force for Physics Education
New Phys.: Sae Mulli 2019; 69: 1153~1165
Published online November 29, 2019;
© 2019 New Physics: Sae Mulli.

Seongsoo JEON1, Donggeul HYUN2*

1Hoewon Elementary School, Changwon 51291, Korea
2Department of Science Education, Teachers College, Jeju National University, Jeju 63294, Korea
Correspondence to:
Received September 2, 2019; Revised October 10, 2019; Accepted October 11, 2019.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Two new methods for measuring the kinetic frictional force were devised and are proposed in this study. One is a method using a spring shooter, and the other is a method using free fall. The important characteristic of these methods is their ability to obtain the kinetic frictional force by measuring the elastic potential energy of the spring shooter used to shoot the sample object and the distance the sample object moves, which is different from the existing methods for calculating the kinetic frictional force. In the existing methods, the kinetic frictional force are obtained by substituting the acceleration of the sample object calculated by using the distance and the times measured between the two positions that the sample object moves into the motion equation. The validity of the proposed methods in this study was verified by measuring the coefficient of the kinetic frictional force between a wood block and the phenol composite laminate plane.
PACS numbers: 01.40.E-, 01.50.Pa
Keywords: Kinetic frictional force, Measurement experiment, Spring shooter method. Free fall method

November 2019, 69 (11)
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