{"title":"\u5186\u904b\u52d5\u306e\u901f\u5ea6\u3068\u52a0\u901f\u5ea6","height":"190","version":"1.0","blog_url":"https://pulin.hateblo.jp/","blog_title":"\u5fa1\u5149\u5802\u4e16\u754c~Pulin\u306e\u65e5\u8a18","type":"rich","url":"https://pulin.hateblo.jp/entry/20171204/1512357460","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fpulin.hateblo.jp%2Fentry%2F20171204%2F1512357460\" title=\"\u5186\u904b\u52d5\u306e\u901f\u5ea6\u3068\u52a0\u901f\u5ea6 - \u5fa1\u5149\u5802\u4e16\u754c~Pulin\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/P/Pulin/20171204/20171204121645.jpg","categories":["\u96d1\u611f"],"description":"\u5186\u904b\u52d5\u306e\u901f\u5ea6\u3068\u52a0\u901f\u5ea6\u306f\u3069\u3046\u3084\u3063\u3066\u6c42\u3081\u308b\u3093\u3060\u3063\u305f\u304b\u306a\u3001\u3068\u9ad8\u6821\u7269\u7406\u30ec\u30d9\u30eb\u306e\u3053\u3068\u304c\u6c17\u306b\u306a\u3063\u3066\u3001\u3084\u3063\u3066\u307f\u305f\u3002 \u539f\u70b9\u3092\u4e2d\u5fc3\u3068\u3059\u308b\u534a\u5f84r\u306e\u5186\u5468\u4e0a\u3092\u8cea\u70b9\u304c\u7b49\u901f\u5186\u904b\u52d5\u3057\u3066\u3044\u308b\u3068\u3059\u308b\u3002\u305d\u306e\u89d2\u901f\u5ea6\u3092\u03c9\u3068\u3059\u308b\u3002 \u8cea\u70b9\u306e\u4f4d\u7f6e(x,y)\u306f x=rcos\u03c9t y=rsin\u03c9t \u3060\u304b\u3089\u901f\u5ea6\u306f\u305d\u308c\u3092t\u3067\u5fae\u5206\u3057\u305f dx/dt=-r\u03c9sin\u03c9t dy/dt=r\u03c9cos\u03c9t \u3068\u306a\u308a\u901f\u5ea6\u306e\u5927\u304d\u3055v\u306f v=\u221a((-r\u03c9sin\u03c9t)^2+(r\u03c9cos\u03c9t)^2)=r\u03c9 \u3068\u306a\u308b\u3002 \u4f4d\u7f6e\u30d9\u30af\u30c8\u30ebr=(x,y)=(rcos\u03c9t,rsin\u03c9t) \u3068 \u901f\u5ea6\u30d9\u30af\u30c8\u30ebv=(dx/dt,dy/dt)=(-r\u03c9sin\u03c9t,r\u03c9cos\u03c9t) \u306e\u5185\u7a4d\u306f r\u30fb\u2026","width":"100%","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/Pulin/","published":"2017-12-04 12:17:40","author_name":"Pulin"}