实验室里测定重力加速度g值方法很多,其提供的器材主要有光电门传感器、数字计时器、电磁铁、学生电源、刻度尺、铁架台和计算机,还有一些铁片小球等,在此做一下总结和简析.方案1:如图1,电磁铁与计时器联动,计时器测出小球从电磁铁到光电门A的时间t;用刻度尺测出从小球开始下落的位置到光电门A中心的距离h,即 There are many ways to determine the value of gravity acceleration g in the laboratory. The equipment provided mainly includes photoelectric door sensor, digital timer, electromagnet, student power supply, scale, iron stand and computer, as well as iron pellets, etc. Do a summary and analysis.Procedure 1: As shown in Figure 1, the electromagnet and timer linkage, the timer measured the ball from the electromagnet to the photoelectric gate A time t; measured with a graduated drop from the ball to the position Photoelectric gate A center distance h, that is