PickVidsWhat keeps a train on the track?
推荐理由
Here's a great explanation by Richard Feynman
说明
这是2009年由BoreMeScience发布的一部讲解，主题归在Fundamental physics。它讲的是railway wheel physics这一支里的具体问题，而不是把整个领域扫一遍。适合按兴趣直接看、不打算先补课的人。内容上可以概括成：A short clip of Richard Feynman explaining how a train stays on its tracks, through the conical shape of wheels and how it handles curves without differentials.这些读者给出的理由，核心是：HN links it as a great, surprising explanation whenever rail wheels, gauge or curves come up.讲法不绑某一条新闻，过几年仍然可以当材料看。从2019年到2022年，有1位不同的读者在1个不同月份把它推荐出来，其中明确叫别人去看的有0次。适合用一集把一个概念补上的人。抓住它用的那个图像或类比，比背公式重要。如果已经会了基本定义，就把注意力放在它怎么把railway wheel physics变成能跟着复述的例子。
视频信息
- 频道
- BoreMeScience
- 时长
- 2 分 27 秒
- 发布年份
- 2009
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