Obravnava učinkov upora v vodi in zraku pri pouku fizike

Croselli, David (author), Golli, Bojan (mentor)

Tematiko gibanja pod vplivom upora sem postavil v šolsko okolje. V prvem delu sem teoretično obdelal kvadratni zakon upora, ki ga izpeljemo iz zastojnega tlaka ter zapisal računalniški program za reševanje diferencialnih enačb, s katerimi opišemo gibanje telesa v sredstvu. Na podlagi analiz poskusov ter teoretičnih izhodišč sem sestavil postopek, s katerim lahko določimo mejo, ko je za določeno telo potrebno upoštevati silo upora in v kolikšni meri. Na tak način sem učiteljem olajšal delo pri izbiri telesa za prikaz poskusov v učnih procesih. V drugem delu sem želel ugotoviti, kakšne so predstave učencev, dijakov ter študentov o silah, ki delujejo na telo v trenutku, ko ga sunemo, ko leti ali ko prosto pada. V ta namen sem pripravil test, v katerega sem vključil značilne poskuse, kot sta prosti pad in poševni met. Poskusa sem predhodno izvedel, analiziral in kot zaporedje slik vključil v testna vprašanja. S testiranjem sem ugotavljal prisotnost zakoreninjenih predstav učencev, dijakov ter študentov o sili upora in gibanju. Teste, ki sem jih zbral na različnih izobraževalnih ustanovah, sem pregledal in ovrednotil. Rezultate sem analiziral in interpretiral ter jih prikazal v grafični ter tabelarični obliki.

• Language: Slovenian
• Keywords: zakoreninjene predstave
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: PEF - Faculty of Education
• Year: 2017
• PID: 20.500.12556/RUL-95040
• COBISS.SI-ID: 11689545
• Publication date in RUL: 19.09.2017

Secondary language

• Language: English
• Title: Investigation of the effects of air and water resistance in physics class

Abstract

I have put the topics of motion under drag forces into the school environment. In the first part I have theoretically dealt with the quadratic law of resistance, which is deduced from the Bernoulli equation, and I have written a computer program for solving the differential equation governing the motion of a body in medium. Based on the analysis of the experiments and theoretical starting points, I have compiled a procedure with which one can determine the conditions under which the drag force has to be taken into account and to what extent. In that way I have facilitate the teachers' s choice of a suitable body that can be used for demonstration experiments in the learning process. In the second part I have investigated the schoolchildren' s perceptions about the forces that act on the body at the moment when we push it, when it flies or freely falls. For this purpose, I have prepared test questions in which I have included typical experiments, such as the free fall and projectile motion. The experiments have been previously performed and analyzed, and then included in the test' s questions as a sequence of photographs. My aim has been to find out what are the misconceptions that schoolchildren have about drag forces and motion. I have examined and evaluated the answers I have gathered in various learning institutions. Finally I have analyzed and interpreted the results, and presented them using graphs and tables.

• Keywords: misconceptions