Comparative modeling of free fall and drag-enhanced motion in the classical physics drop experiment

Siebert, Cora; DeStefano, Paul; Widenhorn, Ralf

doi:10.1088/1361-6404/ab1fbc

Cited by 10 publications

(14 citation statements)

References 26 publications

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“…Today, computers enable more complex calculations [25] and the application of techniques and methods such as local positioning systems (LPS) for tracking the motion [26] or visuohaptic simulations for analysing the students' reasoning and explanations of friction concepts [27].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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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.

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Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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“…The study of falling objects is central to all physics curricula. Experimental studies performed by students include falling coffee filters [6][7][8], toy cats [4], balloons [9][10][11][12], and balls [11,[13][14][15]. Similar to objects in nature, such as leaves, raindrops, or soot particles, none of these objects move through the air with constant acceleration.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, the effect of air resistance can be manipulated in various ways. For example, by experimenting in liquid instead of air [13], changing the surface of the object [15], or changing the mass using lightweight objects such as a coffee filter [6][7][8], muffin cup [16] or balloon [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The jerk and the vertical fall of a shuttlecock

Reistad¹

2022

Eur. J. Phys.

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Jerk, the derivative of acceleration with respect to time, is a physical concept of great practical significance. However, this concept is rarely mentioned in textbooks and is often neglected in physics education. This paper describes how the concept of jerk can be easily introduced in the study of the dynamics of falling bodies, which are significantly affected by air resistance. In this regard, the vertical fall of two different feather shuttlecocks, a standard and a miniature one, is studied. In this simple vertical fall experiment, air resistance is significant and measurable, implying that the acceleration changes, and thus, the jerk can be determined. The velocity, acceleration, and jerk measurements with time during the vertical fall are described and compared with those from different standard air resistance models. The proposed setup can help initiate a discussion of well-known basic physics concepts and modeling approaches, such as displacement, velocity, acceleration, and particularly the often-neglected jerk concept.

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“…Depending upon the characteristics of the flow, represented by a Reynolds number, two different types of drag models are used: a linear drag model and a quadratic drag model. To handle a projectile's motion while incorporating these drag models, various researches have been conducted to find their solutions while addressing several aspects of the problem [2][3][4][5][6][7]. Since neglecting the resistant force to projectile motion is impractical, is desirable to develop analytic solutions from a simplified model so as to elucidate some of the essential features and structure of this problem.…”

Section: Introductionmentioning

confidence: 99%

Horizontal projectile motion: comparing free fall and drag resistance

2020

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The motion of a particle that is projected into a resistant medium and subjected to a uniform gravitational field is considered. The drag force that acts upon the particle within the medium is proportional to the particle’s speed, the density of the medium, and the cross-section area of the projectile. We review the problem of a horizontal motion with a drag force that is linear in speed. The problem is formulated in terms of particle speed, mass, height, time, and expelled gas velocity. The equations of motion are solved analytically, and a case study is discussed. As a result, we obtain the deviation of the projectile as a function of time because of the expelled gases with or without drag force.

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Comparative modeling of free fall and drag-enhanced motion in the classical physics drop experiment

Cited by 10 publications

References 26 publications

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

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

The jerk and the vertical fall of a shuttlecock

Horizontal projectile motion: comparing free fall and drag resistance

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