为了验证牛顿第二定律,我们应用简单的电子线路和设备,制作了一个牛顿第二定律演示装置(图一为平视图,图二为俯视图)。使用时,先将小车5移近电磁铁4,打开电磁铁电源开关 K_2,小车被吸住。在拉绳的另一端挂上法码14,打开计时器电源开关 K_3,同时,应使起点6和终点10处的小灯 A_6A_9和绿色指示灯 A_4A_7发亮,演示时, To verify Newton's second law, we created a Newton's second law demonstration device using simple electronics and equipment (Figure 1 is a plan view and Figure 2 is a top view). When in use, first move the carriage 5 to the electromagnet 4, turn on the electromagnet power switch K_2, and the carriage is sucked. At the other end of the drawstring, attach the code 14, turn on the timer power switch K_3, and at the same time, make the small light A_6A_9 and the green light A_4A_7 at the start point 6 and the end point 10 light,