Abstract
A bicycle wheel is fixed on a vertical metal rod and the circular motion of a point of its edge is investigated by video analysis. The data are compared to both models: uniform and accelerated circular motions. A brief introduction of both models is presented. The understanding of circular motion is important to the comprehension of further topics as the rolling of rigid bodies and the rotational kinetic energy.
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Notes
- 1.
The representation \( \dot{\theta} \) is equivalent to the first derivative related to time \( \frac{d\theta}{d t} \) and \( \ddot{\theta} \) to the second derivative \( \frac{d^2\theta}{{d t}^2} \).
- 2.
Recently a paper was published at Revista Brasileira de Ensino de Física proposing the use of the internal acceleration sensor of the modern smartphones in two experiments intended to study the circular motion [2]. Those devices are widely used among young students, by offering uncountable resources of games, social net, and applets. A simple and interesting explanation of the accelerometer can be found in reference [3]. Other publications about the use of the acceleration sensor for didactic purposes can be found in references [4–10].
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de Jesus, V.L.B. (2017). Circular Motion by Video Analysis. In: Experiments and Video Analysis in Classical Mechanics . Undergraduate Lecture Notes in Physics. Springer, Cham. https://doi.org/10.1007/978-3-319-52407-8_4
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DOI: https://doi.org/10.1007/978-3-319-52407-8_4
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