Literaturnachweis - Detailanzeige
| Autor/in | Salu, Yehuda |
|---|---|
| Titel | Revisiting the Ladder on a Wall Problem |
| Quelle | In: Physics Teacher, 49 (2011) 5, S.289-290 (2 Seiten)Infoseite zur Zeitschrift
PDF als Volltext |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
| ISSN | 0031-921X |
| DOI | 10.1119/1.3578423 |
| Schlagwörter | Textbooks; Physics; Science Instruction; Scientific Principles; Problem Solving; Correlation |
| Abstract | The problem of a ladder leaning on a wall has been a staple of introductory physics for years. It is discussed in numerous physics textbooks and in journals. Now, it even has an Internet presence. Postings from students seek help for "ladder on a wall" problems. A quick review of those postings would show that they all deal with frictionless walls. This is also how the situation is presented in most textbooks. One may get the impression that the friction between a ladder and a wall is always negligible, or that dealing with it is so difficult that it should be left out of the realm of introductory physics. The truth of the matter is that the magnitude of the friction coefficient between a ladder and a wall is not much different from that with the floor, and that friction with the wall is an important part of the conditions for having a static ladder. This paper derives a simple relationship between the friction coefficients of the ladder with the floor ([mu][subscript 1]) and with the wall ([mu][subscript 2]), when the ladder is in static equilibrium. Figure 1 shows the forces that act on a ladder that leans on a wall. (As Provided). |
| Anmerkungen | American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: pubs@aapt.org; Web site: http://scitation.aip.org/tpt |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2017/4/10 |
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