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Friction Forces on a Pulled Spool
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| Pengarang | : | Rod Cross |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 62 (No. 9) |
| Halaman | : | 725-727 |
| Abstrak | : | A simple experiment is described using a spool pulled across a horizontal surface, showing that the friction force on the spool increases with the pull force, consistent with theoretical calculations. A much smaller friction force arises if the ribbon around the spool is pulled from the top of the spool rather than from the bottom of the spool. |
Piecewise Grading Reform Year 1: Lab Specifications
| Pengarang | : | Joshua P. Veazey |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 62 (No. 9) |
| Halaman | : | 721-724 |
| Abstrak | : | Traditional, points-based grading systems make it challenging to communicate that learning is a complex process, and that mistakes are opportunities for growth. In fact, evidence suggests that students knowingly prioritize maximizing points over maximizing learning.1 Over the past several years, different forms of alternative grading have grown in popularity in higher education. Alternative grading can take the form of standards-based mastery grading,2,3 specifications grading,4,5 ungrading,6 or hybrids of these.7 While specifics within alternative grading systems vary among instructors, successful grading systems share certain features. Clark and Talbert describe the “four pillars” of alternative grading7: (1) clearly defined standards, (2) helpful feedback, (3) marks indicate progress, and (4) reassessment without penalty. Believing in the advantages of alternative grading systems is easier than implementing them. |
Listen A Smartphone Inquiry on the Domino Effect
| Pengarang | : | Laurent Dalla Pola; Luis Darmendrail; Edward Galantay; Andreas Mueller |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 62 (No. 9) |
| Halaman | : | 715-720 |
| Abstrak | : | In this work, we investigate the phenomenon of a chain of falling dominoes (“domino effect”) by an acoustical measurement with a smartphone. Specifically, we will present an approximate model valid for a considerable range of realistic parameters of the domino effect; a new, easy, and low-cost experimental method using acoustical data captured by smartphones; and a comparison of these experimental data to the simplified treatment and to other, more comprehensive theories. The results of the experiments show good agreement with other measurements and theory, both advanced ones from the literature and our own simplified treatment: qualitatively, the approach to a constant propagation velocity of the domino front after a small number of toppled dominoes as predicted by theory; quantitatively, the numerical value of the asymptotic propagation velocity. |
Oblique Collisions Between Billiard Balls for Introductory Physics
| Pengarang | : | Alan J. DeWeerd |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 62 (No. 9) |
| Halaman | : | 711-714 |
| Abstrak | : | The application of physics to billiards has a long history. For example, Coriolis wrote a book on the topic in 1835.1 An oblique (not head-on) collision between the cue ball and another ball is an interesting example for an intermediate-level course on classical mechanics. At first glance, such collisions seem simple, but there are some subtleties. I will explore what can be reasonably covered in an introductory course without too much mathematics, emphasizing cases where the results are relatively simple. |
Reflections of Quantum Educators on Strategies to Diversify the Second Quantum Revolution
| Pengarang | : | Apekshya Ghimire; Chandralekha Singh |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 1) |
| Halaman | : | 35-39 |
| Abstrak | : | The second quantum revolution focuses on quantum information science and technology (QIST). It promises to bring about unprecedented improvements in computing, communication, and sensing due to our ability to exquisitely control and manipulate quantum systems.1,2 This fast-growing field presents equally unprecedented opportunities and challenges for preparing students to be future leaders in this area. |
Secondary and University Students Descriptions of Quantum Superposition
| Pengarang | : | |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 1) |
| Halaman | : | 32-34 |
| Abstrak | : | Physics is undergoing rapid developments in quantum technology, and physics students need updated and relevant quantum physics education to equip them for the future. Quantum measurement and superposition are important concepts in quantum technology, but there are few studies on the teaching and learning of these in secondary education. In this paper, we use interview data to study how Norwegian upper secondary students described superposition after having worked with digital learning resources emphasizing qualitative understanding and visualizations, and we compare them to descriptions from university students having completed an introductory quantum mechanics course. Using pedagogical link-making as a lens, we discuss how upper secondary physics can support students’ knowledge building without access to all the building blocks that university students have. |
Rolling to a Stop Down an Inclined Golf Green
| Pengarang | : | Rod Cross |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 1) |
| Halaman | : | 29-31 |
| Abstrak | : | On a gently sloping golf green, the ball usually rolls to a stop regardless of whether it rolls up or down or across the slope. A simple experiment is described to show how the slope and the coefficient of rolling friction can be measured. |
The Quantum for All Students and Teachers Project: Sample Activities and the Historical Storyline Linking Them
| Pengarang | : | |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 1) |
| Halaman | : | 26-28 |
| Abstrak | : | The Quantum for All Students and Teachers Project is a program funded by the National Science Foundation (#2048691) to expand quantum science education in high schools. The central focus is professional development for teachers, but there is considerable work that goes into developing and validating the instructional materials. In this paper, we provide a general overview of the project. We also provide some details on activities that address specific topics that are included in the Next Generation Science Standards: the electromagnetic spectrum and the dual wave/particle behavior of light. Finally, we discuss a historical storyline that was used with the teachers in the 2024 summer workshop to link several activities dealing with early quantum theory. |
Grovers Search Algorithm: An Approachable Application of Quantum Computing
| Pengarang | : | Jed Brody; Grant-Christopher Worthington Sykes |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 1) |
| Halaman | : | 23-25 |
| Abstrak | : | Quantum computing has generated considerable excitement in the media, and even introductory students may wish to delve into this hot topic.1 Grover’s search algorithm, sometimes called a “killer app”2 of quantum computing, is typically taught with the full machinery of linear algebra: inner products, outer products, and summation notation. We avoid these abstractions and present the essence of Grover’s algorithm at a level appropriate for introductory physics students. No background in quantum mechanics is required. Students can design and run their own circuits on remote quantum processors, for free, via the IBM Quantum website. |
Sauntering Sauropods: The Preferred Walking Speeds of the Largest Land Animals That Ever Lived
| Pengarang | : | Scott A. Lee; Justyna Slowiak |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 1) |
| Halaman | : | 20-22 |
| Abstrak | : | Motion is a fundamental part of every introductory physics course. Here we present the exciting example of calculating the walking speed of sauropod dinosaurs via the inverted pendulum model1 of walking by using kinematics, Newton’s second law of motion (in rotational form), and simple harmonic motion. This methodology is first applied to humans, horses of various sizes, and the elephant Elephas maximus to demonstrate its validity and to provide an estimate of the uncertainties associated with this simple model of walking. The students then find that the enormous sauropod dinosaurs (the largest animals that have ever lived on land) walked at speeds very similar to modern animals. A human would have been able to walk alongside even the largest sauropod with relative ease. |