科學遊戲實作_SM的魔法教室 私立協同中學物理教師 何世明
單元名稱 相關科學原理 鳳棲梧桐(實作) 飛鳳傳說(示範實作) 紙杯變化球、灌籃高手、 噴霧器(實作) 水舞秀(實作) 流體力學、伯努力原理的運用 水舞秀(實作) 大氣壓力、水壓 鳳棲梧桐(實作) 力學能守恆、動能與位能的交 互轉換、摩擦力、簡諧運動 飛鳳傳說(示範實作) 流體力學、空氣動力學、轉動 與角動量、伯努力原理的運用
紙杯變化球、創意噴霧器、灌籃高手(實作) 壓力小 壓力大 慢 慢 快
材料: 活動一：紙杯變化球 紙杯(或塑膠杯) 2個 膠帶 1段 橡皮筋 3條 活動二：創意噴霧器 紙杯 1個 吸管 2支 活動三：灌籃高手
作法: 紙杯變化球 創意噴霧器
作法: 灌籃高手
Bubbles
鳳棲梧桐(實作)
Observation Sleeve: 𝑁, stick to the rod 1 Whole toy: stuck Body: 𝐸 𝑘 =0, 𝑼 𝒎𝒂𝒙 lowest point Sleeve: friction ↓ Whole toy: 𝑈 𝑔 → 𝐸 𝑡 , fall ( 𝐸 𝑡 = 𝐸 𝑘 +𝑈) Body: 𝑼→ 𝑬 𝒌 , upward 1 2 Now, let’s break the motion up and observe it step by step. In picture one, the whole toy would be stuck on the rod, and the body of the woodpecker toy would be at the lowest point relatively to the sleeve. In picture two, the whole toy starts to fall and the body of the woodpecker start to rotate upward. U = potential energy of the body plus the elastic potential energy of the spring.
Observation 3 Sleeve: loose 3 Whole toy: fall, 𝑈 𝑔 → 𝐸 𝑡 Body: 𝑬 𝒌 𝒎𝒂𝒙 , 𝑼=𝟎 upward (inertia) Sleeve: friction ↑ Body: 𝐸 𝑘 →𝑈 upward 3 4 In pictures three and four, the whole toy continues to fall, and the body keeps on rotating upward.
Observation Sleeve: stick to the rod 5 Whole toy: stuck Body: 𝐸 𝑘 =0, 𝑈 𝑚𝑎𝑥 highest point Sleeve: friction ↓ Whole toy: fall, 𝑈 𝑔 → 𝐸 𝑡 Body: 𝑈→ 𝐸 𝑘 downward 5 6 In picture five, the whole toy would be stuck again, and the body comes to its highest point relatively to the sleeve. In picture six, the whole toy would start to fall, and the body would start to rotate downward. This time, the whole toy would fall down a longer distance because the acceleration and the velocity are now in the same direction.
Observation Sleeve: loose 7 Whole toy: down Body: 𝐸 𝑘 𝑚𝑎𝑥 , 𝑈=0 𝐸 𝑘 → 𝑈 𝑠 , downward Sleeve: friction ↑ Whole toy: fall, 𝑈 𝑔 → 𝐸 𝑡 Body: 𝐸 𝑘 →𝑈 downward 7 8 In pictures seven and eight, the whole toy continues to fall, and the body keeps on rotating downward. After picture eight, the motion would go back to picture one.
利用重力、摩擦力和簡諧振動等結合在一起的活動。
水 舞 秀(實作)
飛鳳傳說(示範實作)
趣味磁動力(介紹)
報告結束 敬請指教，謝謝！