用单摆测定当地的重力加速度的实验中，为了减小误差．常采用增加全振动次数和加大摆长的方法．但学生在测量时，常出现相差半个周期或数错全振动的次数，以及由于摆长长度是直尺长度的几倍，使摆长不易测准．为此，笔者根据实验室现有条件，自己动手作了改进，从而减少了... In the experiment of measuring the local gravitational acceleration with a pendulum, in order to reduce the error. Often used to increase the number of full vibration and increase the swing length method. However, when students are measuring, they often have a frequency difference of half a cycle or number of errors, and because the pendulum length is several times the length of the ruler, the pendulum length is not easy to measure. For this reason, according to the current conditions of the laboratory, the author made improvements on his own initiative, thereby reducing...