Da queda livre ao paraquedismo – uma proposta de ensino da resistência do ar por meio da análise de vídeos utilizando o tracker

Abstract

This work presents the proposal and the report of the application of a didactic sequence, developed with the intention of encouraging students to research the quntitys and physical agents involved in the motion of falling corps. The present work was based on the study of the free fall and fall movement under the action of the air resistance force, in the practice of experimental activity and the use of the Tracker, software that makes possible frame by frame analysis of videos involving movements. By these methods, added to observation and engagement, this work aims to lead students to the conception of the differences between these movements, detecting the agents responsible for the movement and the physical quantities involved. The sequence was structured to be worked on six regular classes in the first year of high school, however, in the course of the work we used seven classes. The sequence was designed in order to maintain an intuitive link between the student and a research. For this, informative texts, home activities, individual and group forms were prepared. Between the proposed activities, students made parachutes, were responsible for the experimental practice and used the Tracker. The teacher was given the role of mediator, carrying out interventions when necessary. We concluded that the different activities developed motivated the student's curiosity, engagement and commitment to work. During these activities, they had the opportunity to develop skills in the use of an educational technological tool and skills for learning physical concepts. From the results obtained, we realize that students need to be directed to the use of technology in favor of learning, that graphic reading is facilitated when accompanied by the movement in question, through interaction students express themselves more easily contributing to learning. We believe that this sequence contributes to the work of teachers who are willing to use new tools for teaching of physics.