<h3>亲爱的大朋友小朋友们大家好，今天的空中微课堂开课啦，胡老师和小朋友们一起动手制作不倒翁，来解开不倒翁不倒的秘密吧！</h3> <h3>准备材料：双面胶/蛋壳/橡皮泥/胶水/剪刀/马克笔/圆规/卡纸</h3> <h3>在卡纸上用圆规画出一个扇形裁。</h3> <h3><span style="background-color: rgb(255, 215, 158); color: rgb(101, 55, 34); font-family: "06d14449de28b13a10365a389c373850"; font-size: 18px; letter-spacing: 0.3px; text-align: justify; white-space: normal;">把扇形卷成</span><span style="background-color: rgb(255, 215, 158); color: rgb(101, 55, 34); font-family: "06d14449de28b13a10365a389c373850"; font-size: 18px; letter-spacing: 0.3px; text-align: justify; white-space: normal;">圆</span><span style="background-color: rgb(255, 215, 158); color: rgb(101, 55, 34); font-family: "06d14449de28b13a10365a389c373850"; font-size: 18px; letter-spacing: 0.3px; text-align: justify; white-space: normal;">锥状</span><span style="background-color: rgb(255, 215, 158); color: rgb(101, 55, 34); font-family: "06d14449de28b13a10365a389c373850"; font-size: 18px; letter-spacing: 0.3px; text-align: justify; white-space: normal;">，粘贴</span><span style="background-color: rgb(255, 215, 158); color: rgb(101, 55, 34); font-family: "06d14449de28b13a10365a389c373850"; font-size: 18px; letter-spacing: 0.3px; text-align: justify; white-space: normal;">双面</span><span style="background-color: rgb(255, 215, 158); color: rgb(101, 55, 34); font-family: "06d14449de28b13a10365a389c373850"; font-size: 18px; letter-spacing: 0.3px; text-align: justify; white-space: normal;">胶固定住。</span><br></h3><h3><div class="mp-article-images-item-mask" style="margin: auto; -webkit-tap-highlight-color: transparent; position: absolute; left: 0px; right: 0px; top: 0px; bottom: 0px; background-image: url("data:image/png;base64,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"); 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background-repeat: no-repeat; background-position: 50% center; background-size: contain; text-align: center; z-index: -1; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei"; font-size: 6px; white-space: normal; opacity: 0;">把扇形卷成圆锥状，粘贴双面胶固定住</div></h3> <h3>将橡皮泥放入蛋壳中。</h3> <h3><span style="color: rgb(101, 55, 34); font-family: "06d14449de28b13a10365a389c373850"; font-size: 18px; letter-spacing: 0.3px; text-align: justify; white-space: normal; background-color: rgb(255, 215, 158);">把做好的圆锥与蛋壳连接好。</span><br></h3> <h3>把不倒翁放置在平滑的桌子上，</h3><h3><br></h3><h3>尝试推一下它，不倒翁又自动竖立起来。</h3> <h3>为不倒翁画上脸蛋，不倒翁好像在向你点头致敬！</h3> <h3>原理</h3><h3><br></h3><h3>
物体的重心越低越稳定，不倒翁在竖立状态时，重心最低。当我们推它时，不倒翁物体的重心越低越稳定，不倒翁在竖立状态时，重心最低。当我们推它时，不倒翁偏离平衡位置，重心是升高的。为了趋于稳定，重心总是要回到最低位置（即竖立状态），所以不倒翁无论如何摇摆，总是不倒的。</h3><h3><br></h3> <h3>这下小朋友们知道不倒翁不会被推倒的原因了吧？快把家中的蛋壳收集起来，小朋友们就可以一起制作更多更多的不倒翁小人啦！</h3><h3><br></h3><h3>这个假期，让我们一起不出门，在家陪孩子快乐玩科学。万众一心。抵抗病毒。加油！💪我们一定能赢！</h3>