利用智能手机验证机械能守恒定律

Verifying the Law of Conservation of Mechanical Energy with Smartphones

验证机械能守恒定律实验在高中物理实验中有着重要地位,但在课本参考实验中,将气垫导轨与光电门结合时,安装复杂,可视性差.因此,本实验中我们利用智能手机中的Phyphox软件里的深度传感器对气垫导轨上小车的运动过程进行测量,可以直接呈现小车的位移时间关系图像,进而计算出初末时刻的动能和势能变化,该方法有效地提高了实验效率,并帮助学生进一步理解机械能守恒定律.

Experiments to verify the law of conservation of mechanical energy have an im portant position in high school physics experiments,but in the text book reference experiments,when the air cushion guide is com bined with the photoelectric gate,the installation is complicated and the visibility is poor.Therefore,in this experiment,we use the depth sensor in the Phyphox software in the smartphone to measure the motion process of the cart on the air cushion guideway,which can directly present the image of the cart's displacement-time relationship,and then calculate the change of kinetic and potential energy at the beginning and end moments,which effectively im proves the efficiency of the experiment and helps students further understand the law of conservation of mechanical energy.