论文部分内容阅读
本文结合初二力学教学,介绍几个用“手”代替器材做的简易实验。 1 关于力的几个实验 在讲授力的概念时,让学生伸出左右手,手掌对手掌推;一手握着另一手拉;一手掌平放在桌面上,用另一手压着它。随即提问学生:“有何感觉?”这样,就自然地引出了推力、拉力及压力的概念。让学生仔细观察
In this paper, combining the teaching of the second grade mechanics, several simple experiments using “hands” instead of equipment are introduced. 1 Several experiments on force When teaching the concept of force, let the student reach out to the left and right hands, palms push against the palm; hold the other hand in one hand; place one palm on the table top and press it with the other hand. The students were then asked questions: “How does it feel?” This naturally leads to the concept of thrust, tension and pressure. Allow students to observe carefully