2born (2born) wrote,

Еще две статьи по использованию смартфона в учебных экспериментах

61 Ways to Measure the Height of a Building with a Smartphone: https://arxiv.org/abs/2010.11606

В начале статьи авторы, как и ожидалось из названия, вспоминают известный анекдот о молодом Нильсе Боре:))

Frederic Bouquet, Giovanni Organtini, Amel Kolli, Julien Bobroff
We imagined and tested 61 methods to measure the height of a building using a smartphone and everyday low-cost equipment. This open question forces students to explore various fields of physics and confront them with experimental questions such as the validity of a model, the notion of uncertainty, and precision. It allows them to compare different experiments, and can be shaped into various pedagogical scenarios, engaging students in a concrete task, outside of the lab, easily set up at almost zero cost.

Collecting data with a mobile phone: Studies of mechanical laws such as energy and momentum conservation: https://arxiv.org/abs/2010.11315

Maximillian Hart, Mark G. Kuzyk
We use videos taken with a mobile phone to study conservation of energy, conservation of momentum, and the work-energy theorem by analyzing the collision of a cue ball and the eight ball. A video of the full time sequence, starting from before the cue ball is struck until well after the collision, is recorded with a mobile phone. The video is imported into Origin (free to teachers and students taking a class) [OriginLab Corporation, Origin, Version 2020 (OriginLab Corporation, Northampton, MA, USA, 2020)], where the coordinates of the balls are digitized frame-by-frame using the free Video Extractor app. From these data, the velocities are determined as a function of time and used to determine the energy and momentum of each ball. The data suggest that the balls slip through part of their motion when rotating at an angular velocity different than the rolling angular velocity, so angular momentum and frictional torque must be considered. Such experiments require no specialized equipment other than a device to take a video, and the act of digitizing the data provides the student with visual reinforcement of the physics. Experimentation by students outside of campus can be fun for them and provides a useful alternative to classes when in-lab experiments are not practical. Use of a mobile phone in this way is generally applicable to any other mechanical phenomena that involve motion.
Comments: 12 pages 8 figures and 5 tables
Tags: Мегаучебник или Что я читал и похвалил, разгребая arXiv'ы, техника

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