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雨伞是很多学生都十分熟悉并喜欢玩耍的一种常备用具,利用它可以作不少的实验,帮助学生弄清物理概念、学习物理知识。不拘格式利用广泛存在于生活中的用具做实验更有利于深入浅出揭示物理现象本质,破除“科学实验神秘”感,培养学生学习兴趣,这种做法在物理教学中是值得提倡的。一、说明离心运动原理。如图1所示,在红、黑两个小瓶盖上裹缠一段不干胶带,再把两个瓶盖粘在撑开的伞蓬上两个不同地方,
Umbrellas are often used as spares that many students are very familiar with and like to play with. They can be used to make a lot of experiments to help students understand physical concepts and learn physics. Extensive use of tools that are widely used in daily life to perform experiments is more conducive to revealing the nature of physical phenomena, breaking the “mystery of scientific experiments” and cultivating students’ interest in learning. This approach is worthy of promotion in physics teaching. First, explain the principle of centrifugal movement. As shown in Figure 1, a small piece of self-adhesive tape is wrapped around the caps of the two small bottles of red and black, and the two caps are glued on two different places on the opened umbrella canopy.