Experiments Using Cell Phones in Physics Classroom Education: The Computer-Aided g Determination
Experiments Using Cell Phones in Physics Classroom Education: The Computer-Aided g Determination
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在物理课堂教学中使用手机的实验：计算机辅助 g 测定
DOI：
10.1119/1.3628272
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Sebastian Müller
中科院分区：
文献类型：
--
作者：
Patrik Vogt;J. Kuhn;Sebastian Müller
本文继续收集的实验，描述了使用手机作为实验工具，在物理课堂教育。1 -4我们描述了一个计算机辅助确定的自由落体加速度g使用声学多普勒效应。多普勒频移是源速度的函数。由于自由落体的速度随时间线性变化，多普勒频移也随时间变化。可以使用既易于使用又易于获得的软件来测量这种转变。学生们将使用多普勒频移的时间依赖性，通过使用手机作为自由落体发出恒定频率的声音，实验性地确定重力加速度。
This paper continues the collection of experiments that describe the use of cell phones as experimental tools in physics classroom education.1–4 We describe a computer-aided determination of the free-fall acceleration g using the acoustical Doppler effect. The Doppler shift is a function of the speed of the source. Since a free-falling objects speed is changing linearly with time, the Doppler shift is also changing with time. It is possible to measure this shift using software that is both easy to use and readily available. Students will use the time-dependency of the Doppler shift to experimentally determine the acceleration due to gravity by using a cell phone as a freely falling object emitting a sound with constant frequency.