The status of Galileo’s law of free-fall and its implications for physics education

2009 ◽  
Vol 77 (5) ◽  
pp. 417-423 ◽  
Author(s):  
Yaron Lehavi ◽  
Igal Galili
Keyword(s):  
Physics Education ◽  
Free Fall ◽  
The Status

scholarly journals REVIEW OF TRENDS IN PHYSICS EDUCATION RESEARCH USING TOPIC MODELING

2020 ◽  
Vol 19 (3) ◽  
pp. 388-400 ◽  
Author(s):  
Eunjeong Yun
Keyword(s):  
Education Research ◽  
Physics Education ◽  
Topic Modeling ◽  
Introductory Physics ◽  
Research Trend ◽  
Physics Education Research ◽  
Pedagogical Content ◽  
Future Studies ◽  
The Status ◽  
And Gender

For both physicists who teach students in university and physics educators, how physics should be taught is a vital question. This study reviewed the trends of research in the field of physics education to identify the status of physics education research and help researchers in future studies. 2,959 articles were collected from the American Journal of Physics (AJP) and 745 articles from the Physics Review Physics Education Research (PRPER). Abstracts of the collected articles were used for the study. After preprocessing the texts of the abstracts, topics were extracted from the texts using topic modeling. The Late Dirichlet Allocation (LDA) model of Mallet was used for topic modeling. A total of 13 topics were extracted from the two journals. In recent years, “pedagogical content of knowledge (PCK),” “assessment” of achievement and “gender” of student have been topics of increasing interest; “teacher education” and “students’ reasoning process” have been topics with continuous high interest, and “introductory physics” and “problem solving” in physics have been topics with decreasing interest. Keywords: physics education research, physics education, research trend, topic modeling.

PENGAPLIKASIAN KAHOOT DALAM KUIS PEMBELAJARAN FISIKA MATERI GLBB UNTUK UJIAN BERBASIS PERMAINAN

2019 ◽  
Author(s):  
Wahyu Nurhidayat
Keyword(s):  
Physics Education ◽  
Vertical Motion ◽  
Free Fall ◽  
Qualitative Approach ◽  
Upward Motion ◽  
Education Students ◽  
Physics Learning ◽  
Knowing How ◽  
Descriptive Method

This research is a form of Kahoot media application in order to be used as a physics learning medium in the form of quizzes or game-based tests. the purpose of these research are: (1) knowing interesting or not the display of the questions are given, (2) knowing the level of the questions are given, (3) knowing the comparison between quizzes using Kahoot media with conventional media, and (4) knowing how the useful of the quiz with Kahoot media. Selected topic in this research is physics material about Irregularly Changing Straight Motion (Gerak Lurus Berubah Beraturan or GLBB), including: accelerated GLBB, slowed GLBB, vertical upward motion, downward vertical motion, and free fall motion. This research uses a descriptive method with a qualitative approach obtained from closed variable interviewing data. The subjects or respondents of this study are 18 students from 2019 Physics Education students at Siliwangi University. While for the object of this research is Kahoot media as a new perception of game-based exams. The results of this study indicate that: (1) The display of questions are given can be categorized as "Interesting" with a percentage of 50%. (2) The level of questions can be categorized as Quite Varied with a percentage of 55.6%. (3) Research respondents prefer quizzes with Kahoot media to use conventional media with a percentage of 61.1% and 38.9%, respectively. (4) The use of quizzes with Kahoot media can be categorized Good with a percentage of 61.1%.

The geodetic precession as a 3D Schouten precession and a gravitational Thomas precession

2014 ◽  
Vol 92 (10) ◽  
pp. 1082-1093
Author(s):  
E.P.J. (Paul) de Haas
Keyword(s):  
B Physics ◽  
Parallel Transport ◽  
Free Fall ◽  
De Sitter ◽  
Thomas Precession ◽  
Gravity Probe B ◽  
Curved Space ◽  
Geodetic Precession ◽  
The Status ◽  
Gravity Probe

The Gravity Probe B (GP-B) experiment measured the geodetic precession due to parallel transport in a curved space–time metric, as predicted by de Sitter, Fokker, and Schiff. The Schiff treatment included Thomas precession and argued that it should be zero in a free fall orbit. We review the existing interpretations regarding the relation between the Thomas precession and the geodetic precession for a gyroscope in a free fall orbit. Schiff and Parker had contradictory views on the status of the Thomas precession in a free fall orbit, a contradiction that continues to exist in the literature. In the second part of this paper we derive the geodetic precession as a global Thomas precession by use of the equivalent principle and some elements of hyperbolic geometry, a derivation that allows the treatment of GP-B physics in between special and general relativity courses.

scholarly journals A Haptic Model of Entanglement, Gauge Symmetries and Minimal Interaction Based on Knot Theory

Symmetry ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1399
Author(s):  
Stefan Heusler ◽  
Malte Ubben
Keyword(s):  
Hilbert Space ◽  
Physics Education ◽  
Particle Creation ◽  
Heegaard Splitting ◽  
Paper Strip ◽  
Torus Knots ◽  
Quantum Phases ◽  
Gauge Symmetries ◽  
Virtual Particles ◽  
The Status

The Heegaard splitting of S U ( 2 ) is a particularly useful representation for quantum phases of spin j-representation arising in the mapping S 1 → S 3, which can be related to ( 2 j , 2 ) torus knots in Hilbert space. We show that transitions to homotopically equivalent knots can be associated with gauge invariance, and that the same mechanism is at the heart of quantum entanglement. In other words, (minimal) interaction causes entanglement. Particle creation is related to cuts in the knot structure. We show that inner twists can be associated with operations with the quaternions ( I , J , K ), which are crucial to understand the Hopf mapping S 3 → S 2. We discuss the relationship between observables on the Bloch sphere S 2, and knots with inner twists in Hilbert space. As applications, we discuss selection rules in atomic physics, and the status of virtual particles arising in Feynman diagrams. Using a simple paper strip model revealing the knot structure of quantum phases in Hilbert space including inner twists, a h a p t i c model of entanglement and gauge symmetries is proposed, which may also be valid for physics education.

A LABORATORY TEST OF THE EQUIVALENCE PRINCIPLE AS PROLOG TO A SPACEBORNE EXPERIMENT

2007 ◽  
Vol 16 (12a) ◽  
pp. 2245-2258 ◽  
Author(s):  
ROBERT D. REASENBERG ◽  
JAMES D. PHILLIPS
Keyword(s):  
Equivalence Principle ◽  
Degrees Of Freedom ◽  
Vacuum Chamber ◽  
Free Fall ◽  
Upward Motion ◽  
Principle Of Equivalence ◽  
Weak Equivalence Principle ◽  
Motion System ◽  
The Status ◽  
Capacitance Gauge

To test the equivalence principle (EP) to an accuracy of at least σ(Δ g)/g = 5 × 10-14, we are developing a modern Galilean experiment. In our principle-of-equivalence measurement (POEM), we directly examine the relative motion of two test mass assemblies (TMA) that are freely falling. Such an experiment tests both for a possible violation of the weak equivalence principle (WEP) and for new forces that might mimic a WEP violation. For the terrestrial version of the experiment, there are three key technologies. A laser gauge measures the separation of the TMA to picometer accuracy in a second as they fall freely in a comoving vacuum chamber. The motion system launches the TMA from their kinematic mounts inside the chamber and keeps the chamber on a trajectory that mimics free fall until the chamber nears the bottom of its motion. It then "bounces" the chamber back to upward motion in preparation for a new launch of the TMA. A capacitance gauge system measures an additional four degrees of freedom of the motion of each TMA. The resulting estimate of the rotation around and translation along the horizontal axes is used to correct systematic errors. We describe the status of POEM and discuss recent progress.

scholarly journals Computer-Based Experiment of Free Fall Movement to Improve the Graphical Literacy

2017 ◽  
Vol 6 (1) ◽  
Author(s):  
B. Subali ◽  
D. Rusdiana ◽  
H. Firman ◽  
I. Kaniawati ◽  
E. Ellianawati
Keyword(s):  
Physics Education ◽  
Free Fall ◽  
Learning Model ◽  
Learning Activities ◽  
Traditional Learning ◽  
Control Group ◽  
Control Group Design ◽  
Graphical Literacy ◽  
Computer Based ◽  
Experimental Group

<p>The purpose of this study is to develop computer-based experiment of free fall movement to improve the graphical literacy of the Physics Education students. This study employed quasi-experimental design, particularly the pre-test and post-test control group design. The sample was 58 students of the first semester of Physics Education study program. They were divided into two groups, namely 38 students constituted an experimental group and 20 students constituted the control group. Both groups joined learning activities at laboratory and classrooms with the same topic which is the free fall movement. Computer-based learning models were used to design learning activities for the experimental group, while the control group used a traditional learning model with manual experiment with stopwatch and never use experiment tool of free fall movement. It was indicated in this study that the use of such learning model improved the graphical literacy capability better than the traditional learning, which covered ability to identify experimental variables, using the experimental tools, making a graph, formulating mathematical equation, making predictions on the basis of the graph.</p>

scholarly journals Prospects for Studies of the Free Fall and Gravitational Quantum States of Antimatter

2015 ◽  
Vol 2015 ◽  
pp. 1-16 ◽  
Author(s):  
G. Dufour ◽  
D. B. Cassidy ◽  
P. Crivelli ◽  
P. Debu ◽  
A. Lambrecht ◽  
...  
Keyword(s):  
Free Fall ◽  
Quantum States ◽  
Experimental Techniques ◽  
Ultracold Neutrons ◽  
Neutral System ◽  
Close Analogy ◽  
Quantum Reflection ◽  
The Status ◽  
Neutral Antimatter ◽  
Ultimate Limit

Different experiments are ongoing to measure the effect of gravity on cold neutral antimatter atoms such as positronium, muonium, and antihydrogen. Among those, the project GBAR at CERN aims to measure precisely the gravitational fall of ultracold antihydrogen atoms. In the ultracold regime, the interaction of antihydrogen atoms with a surface is governed by the phenomenon of quantum reflection which results in bouncing of antihydrogen atoms on matter surfaces. This allows the application of a filtering scheme to increase the precision of the free fall measurement. In the ultimate limit of smallest vertical velocities, antihydrogen atoms are settled in gravitational quantum states in close analogy to ultracold neutrons (UCNs). Positronium is another neutral system involving antimatter for which free fall under gravity is currently being investigated at UCL. Building on the experimental techniques under development for the free fall measurement, gravitational quantum states could also be observed in positronium. In this contribution, we report on the status of the ongoing experiments and discuss the prospects of observing gravitational quantum states of antimatter and their implications.

PENGAPLIKASIAN KAHOOT DALAM KUIS PEMBELAJARAN FISIKA MATERI GLBB UNTUK UJIAN BERBASIS PERMAINAN

2019 ◽  
Author(s):  
Wahyu Nurhidayat
Keyword(s):  
Physics Education ◽  
Vertical Motion ◽  
Free Fall ◽  
Qualitative Approach ◽  
Upward Motion ◽  
Education Students ◽  
Physics Learning ◽  
Knowing How ◽  
Descriptive Method

This research is a form of Kahoot media application in order to be used as a physics learning medium in the form of quizzes or game-based tests. the purpose of these research are: (1) knowing interesting or not the display of the questions are given, (2) knowing the level of the questions are given, (3) knowing the comparison between quizzes using Kahoot media with conventional media, and (4) knowing how the useful of the quiz with Kahoot media. Selected topic in this research is physics material about Irregularly Changing Straight Motion (Gerak Lurus Berubah Beraturan or GLBB), including: accelerated GLBB, slowed GLBB, vertical upward motion, downward vertical motion, and free fall motion. This research uses a descriptive method with a qualitative approach obtained from closed variable interviewing data. The subjects or respondents of this study are 18 students from 2019 Physics Education students at Siliwangi University. While for the object of this research is Kahoot media as a new perception of game-based exams. The results of this study indicate that: (1) The display of questions are given can be categorized as "Interesting" with a percentage of 50%. (2) The level of questions can be categorized as Quite Varied with a percentage of 55.6%. (3) Research respondents prefer quizzes with Kahoot media to use conventional media with a percentage of 61.1% and 38.9%, respectively. (4) The use of quizzes with Kahoot media can be categorized Good with a percentage of 61.1%.

PENGAPLIKASIAN KAHOOT DALAM KUIS PEMBELAJARAN FISIKA MATERI GLBB UNTUK UJIAN BERBASIS PERMAINAN

2019 ◽  
Author(s):  
Wahyu Nurhidayat
Keyword(s):  
Physics Education ◽  
Vertical Motion ◽  
Free Fall ◽  
Qualitative Approach ◽  
Upward Motion ◽  
Education Students ◽  
Physics Learning ◽  
Knowing How ◽  
Descriptive Method

This research is a form of Kahoot media application in order to be used as a physics learning medium in the form of quizzes or game-based tests. the purpose of these research are: (1) knowing interesting or not the display of the questions are given, (2) knowing the level of the questions are given, (3) knowing the comparison between quizzes using Kahoot media with conventional media, and (4) knowing how the useful of the quiz with Kahoot media. Selected topic in this research is physics material about Irregularly Changing Straight Motion (Gerak Lurus Berubah Beraturan or GLBB), including: accelerated GLBB, slowed GLBB, vertical upward motion, downward vertical motion, and free fall motion. This research uses a descriptive method with a qualitative approach obtained from closed variable interviewing data. The subjects or respondents of this study are 18 students from 2019 Physics Education students at Siliwangi University. While for the object of this research is Kahoot media as a new perception of game-based exams. The results of this study indicate that: (1) The display of questions are given can be categorized as "Interesting" with a percentage of 50%. (2) The level of questions can be categorized as Quite Varied with a percentage of 55.6%. (3) Research respondents prefer quizzes with Kahoot media to use conventional media with a percentage of 61.1% and 38.9%, respectively. (4) The use of quizzes with Kahoot media can be categorized Good with a percentage of 61.1%.

scholarly journals Development of Microcontroller-Based Free Fall Motion Learning Materials to Increase Students’ Conceptual Understanding

2019 ◽  
Vol 4 (1) ◽  
pp. 45
Author(s):  
Infianto Boimau ◽  
Ruth Novi Kornalia Mellu
Keyword(s):  
Data Collection ◽  
Conceptual Understanding ◽  
Experimental Research ◽  
Education Program ◽  
Physics Education ◽  
Free Fall ◽  
Learning Materials ◽  
Physics Learning ◽  
Motion Learning ◽  
Positive Effect

Students’ shortcoming in understanding various concepts of physics is often due to the lack of teaching media can promote student active participation in the learning process. This study aims to develop a valid and effective microcontroller-based physics learning materials as teaching media in enhancing conceptual understanding of free fall motion lessons. This learning materials is developed using the research and development (R&amp;D) method. Effectiveness test of learning materials using pre-experimental research design one group pretest-posttest involve students of physics education program in STKIP SoE. Data collection techniques were done through validation sheets, observations, test questions, and questionnaire sheets. Validation of learning materials through expert testing shows that learning materials are in a valid category. The results of the study shows that learning materials have a positive effect in improving students' conceptual understanding. The effectiveness of the use of learning materials in improving students' understanding of concepts has been analyzed through the results of N-gain calculations which show a moderate score increase. Moreover, the practicality test of learning materials using a Likert scale shows that learning materials are very practical to utilize as teaching media.

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