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Technical gazette, Vol. 29 No. 1, 2022.

Original scientific paper

https://doi.org/10.17559/TV-20210925171045

Development of a Modular Didactic Laboratory Set for the Experimental Study of Friction

Jasmina Miljojković* orcid id orcid.org/0000-0001-8722-0775 ; University of Kragujevac, Faculty of Engineering, Sestre Janjić 6, 34000 Kragujevac, Serbia
Vladimir Kočović orcid id orcid.org/0000-0003-1231-0041 ; University of Kragujevac, Faculty of Engineering, Sestre Janjić 6, 34000 Kragujevac, Serbia
Milentije Luković orcid id orcid.org/0000-0002-6939-025X ; University of Kragujevac, Faculty of Technical Sciences Cacak, Svetog Save 65, 32102 Cacak, Serbia
Aleksandra Živković orcid id orcid.org/0000-0001-7973-8590 ; University of Kragujevac, Faculty of Engineering, Sestre Janjić 6, 34000 Kragujevac, Serbia
Katica Šimunović ; University of Slavonski Brod, Mechanical Engineering Faculty in Slavonski Brod, Trg Ivane Brlic Mazuranic 2, 35000 Slavonski Brod, Croatia

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Abstract

The paper presents the results related to the development of a modular didactic laboratory set for the experimental study of friction and its implementation in engineering education. Successfully implemented in laboratory exercises and research, the modular set has been upgraded over time. A newly developed module is presented for investigating the kinetic coefficient of friction based on the differential equation of motion on an inclined plane. The authors deal with the most critical case - a free fall of a shell-shaped pin down the cylindrical guide when, theoretically, the friction force is equal to zero, while the air resistance force has a maximum value. Based on the time data recorded by inductive sensors, measurements were performed to determine the discrepancy between the theoretical and experimental acceleration values. After introducing the calculation model, the authors quantify very small energy "losses" and analyse the relationship between the unknown resistance force, caused primarily by the imperfections of the experiment, and the air resistance force.

Keywords

engineering education; kinetic friction; modular laboratory set

Hrčak ID:

269509

URI

https://hrcak.srce.hr/269509

Publication date:

15.2.2022.

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