“平抛运动”是人教版高中物理必修2第五章第三节的内容。从教材设计来看,理解平抛运动“两个分运动的等时性”将对之前“运动的合成与分解”和之后的“圆周运动”等曲线运动的研究将起到一个承上启下的作用。为使学生深入理解“分解”“等时”的本质,我们设计了平抛运动演示实验,装置如图1所示。一、实验装置的设计思想将两块电磁铁置于水平滑轨的下方,并将其串联在闭合电路中,这样可以使两块电磁铁在断电瞬间同时失 “Pingpao exercise ” is the PEP teaching physics compulsory 2 Chapter V third quarter content. From the teaching material design point of view, the understanding of flat throwing exercise “two sub-movement isochronicity ” will be on the “synthesis and decomposition ” and after “circular motion ” and other curve movement research To a supporting role. In order to enable students to understand deeply the essence of “decomposition” and “isochronism”, we designed a flat throwing exercise demonstration experiment, the device shown in Figure 1. First, the experimental design of the device Two electromagnets placed below the level of the slide, and its series in the closed circuit, so that the two electromagnets in the power at the same time instantaneous loss