This paper describes the use of a smartphone’s motion sensors in investigating the rotational motion of a rectangular board rotating around a fixed axis. The smartphone’s motion, orientation, rotational rate, and acceleration are simultaneously recorded across the x-, y-, and z-axes. In the experiment, the experimental data (angular position and angular speed of the rotating board) were recorded and were processed to demonstrate the conservation of mechanical energy during rotation. We expect that this article gives an idea of how smartphone-based physics experiments can be useful for physics teachers. Moreover, this experiment helps students better understand the rotational motion of a rectangular board in relation to the conservation of energy.

本文介绍了智能手机的运动传感器在调查绕固定轴旋转的矩形板的旋转运动中的用途。智能手机的运动，方向，旋转速率和加速度会同时记录在x轴，y轴和z轴上。在实验中，记录并处理实验数据（旋转板的角位置和角速度），以证明旋转过程中机械能的守恒。我们希望本文能够给出基于智能手机的物理实验如何对物理教师有用的想法。此外，该实验还可以帮助学生更好地了解与能量守恒有关的矩形板的旋转运动。