| Full text | |
| Author(s): |
Leite, Marcos L.
[1]
;
Maidana, Nora L.
[2]
;
Fonseca, Monaliza
[1]
;
Barros, Suelen F.
[2, 3]
;
Aduriz-Bravo, Agustin
[4]
;
Vanin, Vito R.
[2]
Total Authors: 6
|
| Affiliation: | [1] Univ Sao Paulo, Programa Posgrad Interunidadcs Ensino Ciencias, Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Inst Fis, Sao Paulo, SP - Brazil
[3] Inst Fed Educ Ciencia & Tecnol Sao Paulo, Campus Itaquaquecetuba, Itaquaquecetuba, SP - Brazil
[4] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Inst CeFIEC, CONICET, Buenos Aires, DF - Argentina
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | European Journal of Physics; v. 42, n. 5 SEP 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The experiment with images described here contributes to the scarce literature about the experimental approach to the classical problem of oblique launching on the surface of an inclined plane. It is directed at an intermediate physics course, with the aim of contextualizing the teaching of the laws of friction and empirical modeling in Classical Mechanics. We used a video of a two-dimensional real motion of a coin sliding on an inclined plane, a case where the net force varies continuously. The video frames were separated and each one was assigned a time code by a computational process. The resulting set of images was used to analyze the dynamical evolution of the system, by recording the coin positions at known instants. All the images and laboratory manuals can be accessed at . Realizing that the resistive force can be interpreted as the kinetic friction force, according to Amontons' laws, it is possible to build a theoretical model able to predict the trajectory through a first order numerical method, and then fit its parameters to the observed trajectory. This proposal reconciles the laboratory with Information and Communication Digital Technologies (ICDT). It also favors a deeper discussion about the role of laws, models and hypotheses in the physical sciences, which could be particularly interesting in the case of teacher education. (AU) | |
| FAPESP's process: | 19/11569-0 - Experimental mechanics with images |
| Grantee: | Nora Lia Maidana |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 14/08206-0 - The Virtual Laboratory: complementary didactical material to basic courses in mechanics |
| Grantee: | Nora Lia Maidana |
| Support Opportunities: | Regular Research Grants |