Tilting motion and the moment of inertia of the smartphone

Kaps, A.; Stallmach, Frank

doi:10.1119/1.5145423

Cited by 22 publications

(12 citation statements)

References 8 publications

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“…[33] and uses the idea of Ref. [34] to determine the smartphone's moment of inertia. Like in task E, students can experimentally deepen their knowledge about the parameters of rotational motions and explore the (in-)stableness of different rotational axes.…”

Section: Task F: Rotating Smartphonementioning

confidence: 99%

Smartphone-based undergraduate research projects in an introductory mechanics course

Lahme,

Klein,

Müller

2024

J. Phys.: Conf. Ser.

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At the University of Göttingen, we implemented undergraduate research projects into a first-year mechanics course for physics majors and teacher-training students. Our primary goal was to foster students’ affective factors and higher-order thinking skills in a self-directed, crosslinking, inquiry-based learning setting. A total of 160 students were organized into 40 small groups which worked on one of six open-ended experimental tasks, utilizing smartphone sensors for flexible first-hand data collection outside laboratories. The tasks originate from the Erasmus+ project DigiPhysLab and were significantly modified and opened to be used for undergraduate research projects. In this manuscript, we present the underlying rationales behind this program, outline the core concepts behind the developed experimental tasks, and explain the actual implementation. Additionally, we offer insights into the assessment process for the project work, including the evaluation of scientific posters and responses to eight reflection questions. To facilitate this, we have employed two rubrics to ensure a comprehensive evaluation process.

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Section: Task F: Rotating Smartphonementioning

confidence: 99%

Smartphone-based undergraduate research projects in an introductory mechanics course

Lahme,

Klein,

Müller

2024

J. Phys.: Conf. Ser.

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“…Two different experiments were performed. (1) Standing on an edge in a nearly upright position, the iPad was released and toppled about one of its four edges, stabilized by a heavy book (2.8 kg, 65 mm thick) to prevent it from sliding backwards on the surface. (2) Standing on a corner with the diagonal almost upright, the iPad was released and rotated around one of the corners toward one of the long edges.…”

Section: Experimental Details and Basic Theorymentioning

confidence: 99%

“…In experiments with tablets and smartphones, one of the simplest experiments is to measure the angular velocity and acceleration while the smartphone is toppled over from a nearly vertical position [1][2][3]. This experiment is easy to perform as it does not require any special accessories, and it is quite controlled.…”

Section: Introductionmentioning

confidence: 99%

The toppling iPad

Ziese

2023

Eur. J. Phys.

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The motion of a toppling iPad is analyzed in detail. Measurements of angular velocity and linear acceleration were made for toppling about the edges and corners. From the analysis of the angular velocity, the position of the center of mass and the gyration radii were determined. The position of the accelerometer in the iPad was measured using both the centrifugal acceleration and the Euler acceleration, with the latter measurement providing the more accurate data. This experiment could be used in the first year of a university course in mechanics, either in a physics laboratory or as a home experiment.

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“…One way to engage students in a classical physics course is to use smartphones to test or illustrate various concepts covered in lectures. Smartphones are increasingly used in higher education institutions during the study of mechanics [2][3][4][5][6], thermodynamics [7,8], electromagnetism [9,10], optics [11], as they provide a unique way of conducting a simple…”

Section: Introductionmentioning

confidence: 99%

Measuring Earth’s mean density using BYOD technology

Zdeshchyts,

Zdeshchyts

2023

J. Phys.: Conf. Ser.

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BYOD (Bring your own devices) technologies are becoming more relevant in the educational process, when equipment that is “in the pocket” of a modern student is used in classes. BYOD technology becomes most effective if all students are provided with research equipments. But it is difficult to ensure such conditions in terms of distance learning during the war, the coronavirus pandemic, etc. In order to solve this problem, it is necessary to be able to develop laboratory installations that each student can make on his own. As an example of the implementation of this principle, the article considers a physical installation and a method of conducting laboratory work: “Measuring Earth’s mean density using BYOD technology”, which allows physics students, geodesists, surveyors to determine for themselves that the Earth has a heavy core. The purpose of this article is to show that a smartphone is a powerful measurement tool that, in combination with BYOD technology, increases student learning opportunities, namely: makes laboratory practice not too difficult; provides an opportunity to conduct experiments both in the laboratory and remotely. The main result of the work is proving the fact that the use of BYOD technology in combination with modern measuring tools – smartphones equipped with appropriate applications allows (to solve) the problem of distance learning of students. As it shown by the results of measuring the Earth’s mass and density using BYOD technology, the values are consistent with the known ones obtained with more difficult to use and expensive technique. Along with the values of mass and density, the student receives other characteristics of the Earth: the value and slope of the induction vector of its magnetic field. Exceeding of the Earth’s mean density, which is equal to 5676 kg/m3 according to the results of experiments; the density of the main rock-forming minerals in the Earth’s crust, which is in the range of 1900-3500 kg/m3, leads the student-researcher to think about the internal structure of the Earth.

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Tilting motion and the moment of inertia of the smartphone

Cited by 22 publications

References 8 publications

Smartphone-based undergraduate research projects in an introductory mechanics course

Smartphone-based undergraduate research projects in an introductory mechanics course

The toppling iPad

Measuring Earth’s mean density using BYOD technology

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