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初中物理中的一些实验在教学实践中实施起来总会存在某些问题,如操作不便、现象不明显、材料难寻等。为此,笔者在实践中反复尝试与探索,对效果不明显的实验进行了改进。以下是飞机升力实验和“密度与温度”关系实验的创新设计及改进。一、飞机升力实验1.设计原理“流体压强与流速的关系”一节描述了“飞机的升力”这一实验。为了详细探究升力原理,并使学生通过实验对比深刻认识该现象,笔者特设计该实验
Some experiments in junior middle school physics have some problems in teaching practice, such as inconvenient operation, obvious phenomena, hard to find materials and so on. To this end, the author tried and explored repeatedly in practice, and made some improvements on experiments with insignificant effects. The following is an innovative design and improvement of the aircraft lift test and experiment on the relationship between density and temperature. First, the aircraft lift test 1. Design principle “Fluid pressure and flow rate ” section describes the “aircraft lift ” experiment. In order to explore the lift principle in detail, and enable students to understand the phenomenon through experimental contrast, I designed the experiment