📔 為什麼電扶梯的階梯上面有溝槽，而且扶手動得比較快？

Why Do Escalator Steps Have Grooves and Faster Handrails?🧠 好奇問題：為什麼電扶梯的階梯表面不是平滑的，而是有一格一格像牙齒一樣的溝槽呢？ 還有，為什麼當我們站在電扶梯上時，手扶的地方好像會慢慢比身體前面一點點？🎧 這一集在聊什麼：我們要一起探索電扶梯的神奇設計！ 原來最早的電扶梯是遊樂園裡的設施， 我們會學到階梯在看不見的地方會翻轉移動， 以及階梯上的「牙齒」是如何與梳齒板配合，保護我們的鞋帶不被卡住。👦👧 適合誰收聽：適合國小生收聽，也很適合爸媽陪孩子一起聽、一起討論。🎙️ 節目介紹：這裡是《你想學什麼呢？》，一個用簡單、有趣的方式，陪孩子探索世界各種為什麼的 Podcast。🧠 Curiosity question:Why do escalator steps have grooves that look like teeth instead of being perfectly smooth? Also, have you ever noticed that the handrail seems to move slightly faster than the steps beneath your feet?🎧 What this episode is about:We are going to explore the clever engineering behind escalators! We will learn how they started as a theme park attraction, how the steps flip upside down on their return journey, and how the "teeth" on the steps work with a comb plate to keep our shoes and clothes safe.👦👧 Who this episode is for:This episode is suitable for elementary school children and is great for parents to listen together with their kids.🎙️ About the Podcast:What Do You Want to Learn? is a kid-friendly educational podcast that uses simple and engaging explanations to explore everyday “why” questions with curious young listeners.