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Drawing and using free body diagrams: Why it may be better not to decompose forces?


Aviani, Ivica; Erceg, Nataša; Mešić, Vanes
Drawing and using free body diagrams: Why it may be better not to decompose forces? // Physical Review Special Topics-Physics Education Research, 11 (2015), 020137-1 (međunarodna recenzija, članak, znanstveni)


Naslov
Drawing and using free body diagrams: Why it may be better not to decompose forces?

Autori
Aviani, Ivica ; Erceg, Nataša ; Mešić, Vanes

Izvornik
Physical Review Special Topics-Physics Education Research (1554-9178) 11 (2015); 020137-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Free body diagram; Newton's laws; real forces; superposition of forces; decomposition of forces

Sažetak
In this study we investigated how two different approaches to drawing free body diagrams influence the development of students' understanding of Newton's laws including their ability to identify real forces. For this purpose we developed a 12- item two-tier multiple choice survey and conducted a quasi-experiment. This experiment included two groups of first-year physics students from Rijeka (RG) and Split (SG) University. Students from both groups solved mechanics problems for a period of two class hours. The only difference was that RG students used the superposition of forces approach to solving mechanics problems and in SG the decomposition of forces approach has been used. The ANCOVA showed a statistically significant difference in favour of RG, whereby the effect sizes were moderate to large, and largest differences have been observed in the ability of identifying real forces. Students from the control group (SG) more often exhibited the misconception that forces and their components act on a body independently and simultaneously. Our results support the idea that the practice of resolving forces into components may not be the most effective way to develop understanding of Newton's laws and the concept of force.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Pedagogija



POVEZANOST RADA


Ustanove
Institut za fiziku, Zagreb,
Prirodoslovno-matematički fakultet, Split,
Sveučilište u Rijeci - Odjel za fiziku

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • Social Science Citation Index (SSCI)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus