Maximizing kinetic energy transfer in one-dimensional many-body collisions

Ricardo, Bernard; Lee, Paul

doi:10.1088/0143-0807/36/2/025013

Cited by 12 publications

(7 citation statements)

References 7 publications

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“…This misconception is similar to the common one in the case of one-dimensional collision between two blocks (Ricardo & Lee, 2015). Substituting equation (13) to equations (10) and (11), = = , indicates that the maximum angular speed of the rod is attained when the projectile and the centre of mass of the rod move with identical linear velocities after the collision.…”

Section: First Generalisation: Unevenness (Non-uniformity) Of the Rodmentioning

confidence: 51%

“…For example, in a linear collision, a recent paper demonstrates that even both physics students and teachers with strong conceptual understanding could wrongly suggest that putting more masses in between two bodies could not possibly increase the maximum portion of the kinetic energy transferred (Ricardo & Lee, 2015). . www.ccsenet.org/apr Applied Physics Research Vol.…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive Analysis of the Failure of Intuition in Elementary Rigid Body Dynamics

Ricardo¹

2016

APR

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This article provides a thorough and comprehensive analysis of an elementary problem in rigid body dynamics, involving a projectile and a rod on a smooth table. The problem presented is an extension of a problem taken from an undergraduate physics textbook. This paper presents some generalisations to the problem, namely the unevenness (non-uniformity) of the rod's mass distribution, the elasticity of the collision, and the case where the rod is pivoted. This paper presents nice analytical steps that address some misconceptions in students' way of thinking as well as the failure of intuition when it comes to solving physics problems which necessarily require mathematical approach. The result is quite surprising and counterintuitive as it goes against our intuition with daily experience involving doors and levers.

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Section: First Generalisation: Unevenness (Non-uniformity) Of the Rodmentioning

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Comprehensive Analysis of the Failure of Intuition in Elementary Rigid Body Dynamics

Ricardo¹

2016

APR

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“…The calculated data were based on several assumptions that allowed describing the events of collision mathematically [8]. The following assumptions were made for the purpose of this study:…”

Section: Discussionmentioning

confidence: 99%

“…If the coefficient of restitution is low (close to zero), the collision is more inelastic and therefore, more kinetic energy is lost in the form of heat, sound, or due to localized deformation. On the other hand, if the coefficient of restitution is high (close to one), the collision is more elastic and therefore, less kinetic energy is lost [8].…”

Section: Discussionmentioning

confidence: 99%

Kinematic Analysis of the Tram-pedestrian Collision - a Preliminary Case Study.

Tomsovsky¹,

Kubový²,

Lopot³

et al. 2022

Manufacturing Technology

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The goal of the study was to conduct a preliminary analysis of the kinematics of tram-pedestrian collision in case of a side impact. A T6A5-type tram, travelling at the speed of 10 km/h, was used for the analysis and reconstruction of the collision. The pedestrian response was analysed using a crash-test dummy. The postimpact dummy movement was approximated by the motion of its centre of mass (COM) and only the translation movement in the frontal plane of dummy (along the horizontal and vertical axes) was considered. The results showed a significant change of coefficient of restitution after the initial impact. At first, the coefficient of restitution was high (e = 0.94), suggesting an almost perfectly elastic collision, followed by a sharp decrease (e = 0.07) within a short period of time (t = 0.02 s) that suggested an almost perfectly inelastic collision. After that, the coefficient of restitution reached a plateau phase with the values ranging from 0.18 to 0.32 and corresponding to a percentage loss of kinetic energy falling within 89 % and 97 %. The preliminary analysis of this study highlighted some features of side-impact tram-pedestrian collision and its kinematics.

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“…Data dikumpulkan dengan menggunakan instrumen tes dan wawancara. Tes yang diujikan kepada mahasiswa berupa pilihan ganda beralasan pada materi momentum yang diadaptasi dari Ricardo (2015) dan Serway (2009).…”

Section: Metode Penelitianunclassified

Tingkat Pemahaman Konsep Mahasiswa Pendidikan Fisika Universitas Sebelas Maret pada Materi Momentum

2017

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Abstract: Understanding concepts on the momentum material owned by students is vary. Some students have understood the concept in accordance with scientific truth, but some are not yet. Constraints experienced by students in understanding the concept can lead to misconception. This study aims to analyze the level of understanding of student concepts on the momentum material by using qualitative descriptive method. The subjects of this research are 33 students of Physics Education of Sebelas Maret University who have not received Basic Physics course. Data were collected by tests and interviews. The results showed that 77.27% of students experienced misconceptions on the transfer of energy of mutually colliding objects. Momentum and impulse materials have been taught in the XI Senior High School, though most students have not understood the concept as a whole. Abstrak: Pemahaman konsep pada materi momentum yang dimiliki mahasiswa berbeda-beda. Sebagian mahasiswa sudah memahami konsep sesuai dengan kebenaran ilmiah, namun ada juga yang belum. Kendala yang dialami mahasiswa dalam pemahaman konsep tersebut dapat menimbulkan terjadinya miskonsepsi. Penelitian ini bertujuan untuk menganalisis tingkat pemahaman konsep mahasiswa pada materi momentum dengan menggunakan metode deskriptif kualitatif. Subjek penelitian yang digunakan adalah 33 mahasiswa Semester 1 Pendidikan Fisika Universitas Sebelas Maret yang belum menerima mata kuliah Fisika Dasar. Data dikumpulkan dengan tes dan wawancara. Hasil penelitian menunjukkan 77,27% mahasiswa mengalami miskonsepsi pada transfer energi benda yang saling bertumbukan. Materi momentum dan impuls sudah diajarkan di kelas XI SMA, meskipun demikian sebagian besar mahasiswa belum memahami konsep secara keseluruhan.

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Maximizing kinetic energy transfer in one-dimensional many-body collisions

Cited by 12 publications

References 7 publications

Comprehensive Analysis of the Failure of Intuition in Elementary Rigid Body Dynamics

Comprehensive Analysis of the Failure of Intuition in Elementary Rigid Body Dynamics

Kinematic Analysis of the Tram-pedestrian Collision - a Preliminary Case Study.

Tingkat Pemahaman Konsep Mahasiswa Pendidikan Fisika Universitas Sebelas Maret pada Materi Momentum

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