超重失重是牛顿定律的具体应用,也是与生活实际密切相关的一种物理现象。为了帮助学生轻松理解、掌握这一知识点,有必要做好实验演示,而常规的演示装置不够直观,不便观察,为此,我们对这一装置作了改进。改进的指导思想是把不便观察的物理量(力信号)转换成便于观察的物理量(电信号或声信号),一方面为以后传感器的学 Overweight weightlessness is the specific application of Newton’s law, and it is also a physical phenomenon closely related to the reality of life. In order to help students easily understand and master this knowledge point, it is necessary to do a good demonstration of the experiment. However, the conventional demonstration device is not intuitive and inconvenient to observe. Therefore, we have improved this device. The guiding idea for improvement is to convert inconveniently observed physical quantities (force signals) into physical quantities that can be easily observed (electric or acoustic signals).