{"id":56609,"date":"2025-12-02T04:50:58","date_gmt":"2025-12-01T19:50:58","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=56609"},"modified":"2025-12-03T04:35:20","modified_gmt":"2025-12-02T19:35:20","slug":"a-science-teachers-secret-to-winning-daruma-otoshi-master-it-with-newtonian-physics","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=56609&lang=en","title":{"rendered":"A Science Teacher\u2019s Secret to Winning Daruma-Otoshi: Master It with Newtonian Physics!"},"content":{"rendered":"<p style=\"text-align: center;\"><span style=\"color: #339966;\"><strong>I&#8217;m Ken Kuwako, your Science Trainer. Every day is an experiment.<\/strong><\/span><\/p>\n<p>The Daruma Otoshi is a traditional Japanese folk toy, beloved by many. But did you know that it&#8217;s also a surprisingly perfect teaching tool for demonstrating the Law of Inertia that you learn in science class?<\/p>\n<p>While it&#8217;s often cited as a textbook example, surprisingly few students have actually played the game. Don&#8217;t underestimate this seemingly simple children&#8217;s game; the very essence of Newtonian mechanics is hidden within its structure. If you happen to have a Daruma Otoshi nearby, pick it up! Today, I&#8217;m going to reveal the &#8220;Daruma Otoshi Winning Strategy,&#8221; explained through the lens of physics.<\/p>\n<p><iframe loading=\"lazy\" title=\"\u6163\u6027\u306e\u6cd5\u5247\u304c\u3088\u304f\u308f\u304b\u308b\u30ce\u30b3\u30ce\u30b3\u30a8\u30a2\u30db\u30c3\u30b1\u30fc\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/f-Nusb6nmLE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h3>Conquer the Physics! The Most Important Elements are &#8220;Speed&#8221; and &#8220;Friction&#8221;<\/h3>\n<p>First, stack them up neatly.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-56588 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.21.jpg\" alt=\"\" width=\"483\" height=\"447\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.21.jpg 1280w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.21-300x278.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.21-1024x949.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.21-768x712.jpg 768w\" sizes=\"auto, (max-width: 483px) 100vw, 483px\" \/><\/p>\n<p>The most crucial thing for a successful Daruma Otoshi strike is to &#8220;swing through quickly and without hesitation.&#8221;<\/p>\n<p>The key here is &#8220;frictional force.&#8221; The moment the hammer strikes the bottom piece, friction acts between that piece and the one stacked above it, trying to drag the upper piece down. However, the faster you strike, the less time friction has to act. As a result, the horizontal force applied to the upper pieces is minimized, and the force of &#8220;inertia&#8221;\u2014the tendency to remain in place\u2014wins out. The upper stack then falls cleanly straight down.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-56589 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.48.jpg\" alt=\"\" width=\"384\" height=\"253\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.48.jpg 1902w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.48-300x198.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.48-1024x675.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.48-768x506.jpg 768w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.48-1536x1013.jpg 1536w\" sizes=\"auto, (max-width: 384px) 100vw, 384px\" \/><\/p>\n<p>If you hesitate, or if the speed of your swing is too slow, the friction acts for too long, causing the upper pieces to tumble down with the one you struck. Gathering the courage to &#8220;strike hard and follow through&#8221; is physically the correct approach.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-56590 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.09.01.jpg\" alt=\"\" width=\"385\" height=\"274\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.09.01.jpg 1466w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.09.01-300x214.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.09.01-1024x729.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.09.01-768x547.jpg 768w\" sizes=\"auto, (max-width: 385px) 100vw, 385px\" \/><\/p>\n<h3>Is &#8220;Bigger&#8221; Easier? The Surprising Link Between Mass and Inertia<\/h3>\n<p>There is actually a surprising paradox in Daruma Otoshi: Larger and heavier sets are often easier to play than smaller, lighter ones. Conversely, tiny plastic sets can be difficult, requiring a professional level of precision.<\/p>\n<p>Why is this? The rule at work here is that &#8220;greater mass means greater inertia (meaning it resists change in motion more).&#8221; Just as a heavy truck cannot stop suddenly, a heavy Daruma stack has a strong tendency to remain in its state of rest. Therefore, the greater weight (mass) compensates even for a slightly imperfect strike, making success more likely.<\/p>\n<h3>The Player Who Masters Balance Wins the Game<\/h3>\n<p>The next important factor is the direction of your strike. To prevent the overall balance (center of gravity) from collapsing, it&#8217;s generally best not to strike continuously from the same side. Instead, try alternating strikes from the left and right sides.<\/p>\n<p>In a real game, the position of the center of gravity changes momentarily with every strike and shift. The advanced technique involves observing which way the stack is leaning and adjusting your strike direction to nudge the center of gravity back toward the middle.<\/p>\n<h3>The Biggest Challenge is the &#8220;Last Piece&#8221;<\/h3>\n<p>The most difficult phase of the game, from a physics perspective, actually occurs at the end. What happens when fewer pieces remain and there are fewer Daruma dolls stacked on top?<\/p>\n<p>That&#8217;s right\u2014the overall &#8220;mass&#8221; is reduced, which means the &#8220;inertia&#8221; becomes weaker. The upper section, which felt solid and stable due to its weight in the beginning, becomes very light toward the final piece, and even a slight impact can easily send it flying off. &#8220;The Daruma Otoshi is hardest at the end.&#8221; This is the fundamental truth taught by the laws of mass and inertia.<\/p>\n<p>Even knowing the theory, putting it into practice can be tough! Watch me attempt the challenge in this video:<\/p>\n<p><iframe loading=\"lazy\" title=\"\u7406\u79d1\u6559\u5e2b\u304c\u6559\u3048\u308b\u300c\u3060\u308b\u307e\u843d\u3068\u3057\u300d\u5fc5\u52dd\u6cd5\uff01\u9375\u306f\u30cb\u30e5\u30fc\u30c8\u30f3\u529b\u5b66\u306b\u3042\u308a\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/RYi3JlapCYk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>If you watch the video, you can see how the difficulty gradually increases (and the behavior becomes less stable) from the initial full stack to the final few pieces. I hope you all try this and feel the Law of Inertia with your fingertips.<\/p>\n<h3>Inquiries and Requests<\/h3>\n<p>Make the wonders and fun of science more accessible! We provide easy-to-understand tips and fun science experiments you can do at home. Feel free to search around! \u30fbThe content of our Science Notes has been published in a book. Find out more <a href=\"https:\/\/amzn.to\/42PMCEL\">here<\/a> \u30fbAbout the operator, Ken Kuwako: <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=37\">here<\/a> \u30fbFor various requests (writing, lectures, science classes, TV supervision, appearances, etc.): <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">here<\/a> <span class=\"s2\">\u30fbArticle updates are distributed on <a href=\"https:\/\/x.com\/kuwako\">X<\/a>!<\/span><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.youtube.com\/user\/kkuwako\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-35048\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/03\/3d9640dad7bc5538e76f92da1966ee19.jpg\" alt=\"\" width=\"30\" height=\"21\" \/><\/a><a href=\"https:\/\/www.youtube.com\/user\/kkuwako?sub_confirmation=1\">Our Science Tricks Channel<\/a> posts experiment videos!<\/p>\n<h3>\uff14\u6708\u306e\u30a4\u30c1\u30aa\u30b7\u5b9f\u9a13\uff01<\/h3>\r\n<ul>\r\n \t<li><a href=\"https:\/\/phys-edu.net\/wp\/?p=46937&amp;\">\u5149\u306e\u9b54\u6cd5CMY\u30a6\u30a9\u30fc\u30bf\u30fc\u30ad\u30e5\u30fc\u30d6<\/a>\uff1a\u5149\u306e\u9b54\u6cd5\u3092\u4f53\u9a13\u305b\u3088\uff01\u6c34\u3092\u6ce8\u3050\u3068\u65b0\u305f\u306a\u7acb\u65b9\u4f53\u304c\u51fa\u73fe\u3059\u308b\u9b54\u6cd5\u306e\u3088\u3046\u306a\u5b9f\u9a13\u3067\u3059\u3002<\/li>\r\n<\/ul>\r\n<img class=\"alignnone wp-image-47312 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/12\/71274840332ac4ee4620fb1475a1d79c.jpg\" sizes=\"auto, (max-width: 267px) 100vw, 267px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/12\/71274840332ac4ee4620fb1475a1d79c.jpg 1292w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/12\/71274840332ac4ee4620fb1475a1d79c-272x300.jpg 272w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/12\/71274840332ac4ee4620fb1475a1d79c-928x1024.jpg 928w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/12\/71274840332ac4ee4620fb1475a1d79c-768x848.jpg 768w\" alt=\"\" width=\"267\" height=\"294\" \/>\r\n<h3 style=\"text-align: left;\"><span style=\"font-size: medium;\"><b><strong>\u30c6\u30ec\u30d3\u756a\u7d44\u30fb\u79d1\u5b66\u76e3\u4fee\u7b49\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/span><\/h3>\r\n<ul>\r\n \t<li>4\u67089\u65e5\uff08\u6728\uff09\u300cTHE\u7a81\u7834\u30d5\u30a1\u30a4\u30eb\u300d\uff08\u65e5\u672c\u30c6\u30ec\u30d3 \uff09\u306e\u79d1\u5b66\u76e3\u4fee\u3092\u884c\u3044\u307e\u3057\u305f\u3002\u591c7\u6642\u301c\u3068\u306a\u308a\u307e\u3059\u3002<\/li>\r\n<\/ul>\r\n<h3><span style=\"font-size: medium;\"><b>\u66f8\u7c4d<strong>\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/span><\/h3>\r\n<ul>\r\n \t<li><a href=\"https:\/\/phys-edu.net\/wp\/?p=61585\">\u30b5\u30af\u30bb\u30b915 \uff14\u6708\u53f7<\/a>\u306b\u3066\u3001\u91ce\u7403\u306e\u79d1\u5b66\u306b\u3064\u3044\u3066\u8a18\u4e8b\u3092\u57f7\u7b46\u3057\u307e\u3057\u305f\uff082026\/3\uff09<\/li>\r\n \t<li>\u300e\u5927\u4eba\u306e\u305f\u3081\u306e\u9ad8\u6821\u7269\u7406\u5fa9\u7fd2\u5e33\u300f\uff08\u8b1b\u8ac7\u793e\uff09\u2026\u4e00\u822c\u5411\u3051\u306b\u65e5\u5e38\u306e\u7269\u7406\u306b\u3064\u3044\u3066\u516c\u5f0f\u3092\u5143\u306b\u7d10\u89e3\u304d\u307e\u3057\u305f\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=1827\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u3067\u306f\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<strong>\u203b\u5897\u5237\u304c\u304b\u304b\u308a\uff16\u5237\u3068\u306a\u308a\u307e\u3057\u305f\uff082026\/02\/01\uff09\r\n<img class=\"alignnone wp-image-10940 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg\" sizes=\"(max-width: 220px) 100vw, 220px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0.jpg 311w\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2014-07-05 0.43.51\" width=\"220\" height=\"192\" \/>\r\n<\/strong><\/li>\r\n \t<li>\u300e\u304d\u3081\u308b!\u5171\u901a\u30c6\u30b9\u30c8 \u7269\u7406\u57fa\u790e \u6539\u8a02\u7248\u300f\uff08\u5b66\u7814\uff09\u2026\u3000\u9ad8\u6821\u7269\u7406\u306e\u53c2\u8003\u66f8\u3067\u3059\u3002\u30a4\u30e9\u30b9\u30c8\u3092\u591a\u304f\u3057\u3066\u30a4\u30e1\u30fc\u30b8\u304c\u6301\u3066\u308b\u3088\u3046\u306b\u63cf\u304d\u307e\u3057\u305f\u3002\u6388\u696d\u306b\u3064\u3044\u3066\u3044\u3051\u306a\u3044\u3001\u7269\u7406\u304c\u82e6\u624b\u3001\u305d\u3093\u306a\u751f\u5f92\u306b\u304a\u3059\u3059\u3081\u3067\u3059\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=45322\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u306f\u3053\u3061\u3089\u3002\r\n<img class=\"alignnone wp-image-45718 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg\" sizes=\"(max-width: 184px) 100vw, 184px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg 756w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c-300x269.jpg 300w\" alt=\"\" width=\"184\" height=\"165\" \/><\/li>\r\n<\/ul>\r\n<h3><span style=\"font-size: medium;\"><b>\u8b1b\u5e2b\u30fb\u30b7\u30e7\u30fc\u30fb\u7814\u7a76\u7b49\u306e\u304a\u77e5\u3089\u305b<\/b><\/span><\/h3>\r\n<ul>\r\n \t<li>3\/20\uff08\u91d1\uff09\u3000\u65e5\u672c\u7406\u79d1\u6559\u80b2\u5b66\u4f1a\u30aa\u30f3\u30e9\u30a4\u30f3\u5168\u56fd\u5927\u4f1a2026\u300c<a href=\"https:\/\/phys-edu.net\/wp\/?p=60439\">\u6163\u6027\u306e\u6cd5\u5247\u306e\u6982\u5ff5\u5f62\u6210\u3092\u76ee\u6307\u3057\u305f\u63a2\u7a76\u7684\u306a\u5b66\u3073\u306e\u5b9f\u8df5\u300d<\/a>\u306b\u3064\u3044\u3066\u767a\u8868\u3057\u307e\u3057\u305f\u3002<\/li>\r\n \t<li>6\/14\uff08\u65e5\uff09\u3000\u5343\u8449\u5927\u5b66\u30a4\u30f3\u30b9\u30bf\u30ec\u30fc\u30b7\u30e7\u30f3\u300c\u63a2\u7a76\u300d\u306b\u3066\u8b1b\u5e2b\u3092\u52d9\u3081\u307e\u3059<\/li>\r\n \t<li>7\/18\uff08\u571f\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=60018\">\u6559\u54e1\u5411\u3051\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\u300c\u30ca\u30ea\u30ab\u30ab\u30b5\u30a4\u30a8\u30f3\u30b9\u30a2\u30ab\u30c7\u30df\u30fc\u300d\u306e\u8b1b\u5e2b\u3092\u3057\u307e\u3059<\/a>\u3002\u304a\u4f1a\u3044\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\r\n 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class=\"wp-block-latest-posts__list is-grid columns-3 has-dates wp-block-latest-posts\"><li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=62455&#038;lang=fi\" aria-label=\"N\u00e4etk\u00f6 s\u00e4hk\u00f6n \u201ckorkeuden\u201d!? Opi Kirchhoffin lait 3D:n avulla (Lukion fysiikka)\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/11\/b2418a85e43ea4f380ce30f9972534b5-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=62455&#038;lang=fi\">N\u00e4etk\u00f6 s\u00e4hk\u00f6n \u201ckorkeuden\u201d!? Opi Kirchhoffin lait 3D:n avulla (Lukion fysiikka)<\/a><time datetime=\"2026-04-17T04:46:43+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e744\u670817\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=62457&#038;lang=es\" aria-label=\"\u00bfPuedes ver la \u201caltura\u201d de la electricidad? Domina las leyes de Kirchhoff en 3D (F\u00edsica de secundaria)\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/11\/b2418a85e43ea4f380ce30f9972534b5-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=62457&#038;lang=es\">\u00bfPuedes ver la \u201caltura\u201d de la electricidad? Domina las leyes de Kirchhoff en 3D (F\u00edsica de secundaria)<\/a><time datetime=\"2026-04-17T04:46:33+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e744\u670817\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=62449&#038;lang=zh\" aria-label=\"\u96fb\u7684\u300c\u9ad8\u5ea6\u300d\u770b\u5f97\u898b\uff01\uff1f\u75283D\u8f15\u9b06\u638c\u63e1\u57fa\u723e\u970d\u592b\u5b9a\u5f8b\uff08\u9ad8\u4e2d\u7269\u7406\u6559\u6750\uff09\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/11\/b2418a85e43ea4f380ce30f9972534b5-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=62449&#038;lang=zh\">\u96fb\u7684\u300c\u9ad8\u5ea6\u300d\u770b\u5f97\u898b\uff01\uff1f\u75283D\u8f15\u9b06\u638c\u63e1\u57fa\u723e\u970d\u592b\u5b9a\u5f8b\uff08\u9ad8\u4e2d\u7269\u7406\u6559\u6750\uff09<\/a><time datetime=\"2026-04-17T04:45:56+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e744\u670817\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=33947\" aria-label=\"\u96fb\u6c17\u306e\u300c\u9ad8\u3055\u300d\u304c\u898b\u3048\u3066\u304f\u308b\uff01\uff1f\u30ad\u30eb\u30d2\u30db\u30c3\u30d5\u306e\u6cd5\u5247\u30923D\u3067\u653b\u7565\u3057\u3088\u3046\uff08\u9ad8\u6821 \u7269\u7406 \u6559\u6750\uff09\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/11\/b2418a85e43ea4f380ce30f9972534b5-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=33947\">\u96fb\u6c17\u306e\u300c\u9ad8\u3055\u300d\u304c\u898b\u3048\u3066\u304f\u308b\uff01\uff1f\u30ad\u30eb\u30d2\u30db\u30c3\u30d5\u306e\u6cd5\u5247\u30923D\u3067\u653b\u7565\u3057\u3088\u3046\uff08\u9ad8\u6821 \u7269\u7406 \u6559\u6750\uff09<\/a><time datetime=\"2026-04-17T04:45:52+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e744\u670817\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=62451&#038;lang=hi\" aria-label=\"\u092c\u093f\u091c\u0932\u0940 \u0915\u0940 \u201c\u090a\u0901\u091a\u093e\u0908\u201d \u0926\u093f\u0916\u0928\u0947 \u0932\u0917\u0940!? 3D \u092e\u0947\u0902 \u0938\u092e\u091d\u0947\u0902 \u0915\u093f\u0930\u094d\u0916\u0949\u092b \u0915\u0947 \u0928\u093f\u092f\u092e (\u0939\u093e\u0908 \u0938\u094d\u0915\u0942\u0932 \u092d\u094c\u0924\u093f\u0915\u0940)\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/11\/b2418a85e43ea4f380ce30f9972534b5-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=62451&#038;lang=hi\">\u092c\u093f\u091c\u0932\u0940 \u0915\u0940 \u201c\u090a\u0901\u091a\u093e\u0908\u201d \u0926\u093f\u0916\u0928\u0947 \u0932\u0917\u0940!? 3D \u092e\u0947\u0902 \u0938\u092e\u091d\u0947\u0902 \u0915\u093f\u0930\u094d\u0916\u0949\u092b \u0915\u0947 \u0928\u093f\u092f\u092e (\u0939\u093e\u0908 \u0938\u094d\u0915\u0942\u0932 \u092d\u094c\u0924\u093f\u0915\u0940)<\/a><time datetime=\"2026-04-17T04:45:39+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e744\u670817\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=62443&#038;lang=en\" aria-label=\"See the \u201cHeight\u201d of Electricity!? Master Kirchhoff\u2019s Laws in 3D (High School Physics)\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/11\/b2418a85e43ea4f380ce30f9972534b5-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=62443&#038;lang=en\">See the \u201cHeight\u201d of Electricity!? Master Kirchhoff\u2019s Laws in 3D (High School Physics)<\/a><time datetime=\"2026-04-17T04:45:04+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e744\u670817\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=62445&#038;lang=ko\" aria-label=\"\uc804\uae30\uc758 \u2018\ub192\uc774\u2019\uac00 \ubcf4\uc778\ub2e4!? 3D\ub85c \uc815\ubcf5\ud558\ub294 \ud0a4\ub974\ud788\ud638\ud504 \ubc95\uce59 (\uace0\ub4f1\ud559\uad50 \ubb3c\ub9ac)\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2019\/11\/b2418a85e43ea4f380ce30f9972534b5-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=62445&#038;lang=ko\">\uc804\uae30\uc758 \u2018\ub192\uc774\u2019\uac00 \ubcf4\uc778\ub2e4!? 3D\ub85c \uc815\ubcf5\ud558\ub294 \ud0a4\ub974\ud788\ud638\ud504 \ubc95\uce59 (\uace0\ub4f1\ud559\uad50 \ubb3c\ub9ac)<\/a><time datetime=\"2026-04-17T04:44:50+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e744\u670817\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=42597\" aria-label=\"\u9855\u5fae\u93e1\u306e\u4e2d\u306b\u5e83\u304c\u308b\u7dd1\u306e\u5b87\u5b99\uff01\u30aa\u30aa\u30ab\u30ca\u30c0\u30e2\u3067\u300c\u751f\u304d\u3066\u3044\u308b\u7d30\u80de\u300d\u3092\u89b3\u5bdf\u3057\u3088\u3046\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/04\/9dafe050433027be5d26733fe21006c3-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=42597\">\u9855\u5fae\u93e1\u306e\u4e2d\u306b\u5e83\u304c\u308b\u7dd1\u306e\u5b87\u5b99\uff01\u30aa\u30aa\u30ab\u30ca\u30c0\u30e2\u3067\u300c\u751f\u304d\u3066\u3044\u308b\u7d30\u80de\u300d\u3092\u89b3\u5bdf\u3057\u3088\u3046<\/a><time datetime=\"2026-04-17T04:24:40+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e744\u670817\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=42658\" aria-label=\"\u898b\u3048\u306a\u3044\u4e16\u754c\u3078\u306e\u30d1\u30b9\u30dd\u30fc\u30c8\uff1a\u30bf\u30de\u30cd\u30ae\u306e\u8868\u76ae\u304c\u6559\u3048\u3066\u304f\u308c\u308b\u751f\u547d\u306e\u795e\u79d8\uff08\u7d30\u80de\u306e\u89b3\u5bdf\uff09\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/04\/f1f112152ccbc9005411c6f37aeb69d6-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=42658\">\u898b\u3048\u306a\u3044\u4e16\u754c\u3078\u306e\u30d1\u30b9\u30dd\u30fc\u30c8\uff1a\u30bf\u30de\u30cd\u30ae\u306e\u8868\u76ae\u304c\u6559\u3048\u3066\u304f\u308c\u308b\u751f\u547d\u306e\u795e\u79d8\uff08\u7d30\u80de\u306e\u89b3\u5bdf\uff09<\/a><time datetime=\"2026-04-17T04:12:49+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e744\u670817\u65e5<\/time><\/li>\n<\/ul>&nbsp;","protected":false},"excerpt":{"rendered":"<p>I&#8217;m Ken Kuwako, your Science Trainer. Every day is an experiment. The Daruma Otoshi is a traditional Jap [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":56589,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","vkexunit_cta_each_option":"","footnotes":""},"categories":[781],"tags":[],"class_list":["post-56609","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science-en"],"jetpack_featured_media_url":"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-12-01-19.08.48.jpg","jetpack-related-posts":[{"id":52756,"url":"https:\/\/phys-edu.net\/wp\/?p=52756&lang=en","url_meta":{"origin":56609,"position":0},"title":"Science at the Dinner Table! Pop! Is Sprinkling Salt Really the Same as the \u201cDaruma Otoshi\u201d Trick? (Law of Inertia)","author":"\u6851\u5b50 \u7814","date":"2025\u5e749\u670820\u65e5","format":false,"excerpt":"The Law of Inertia Hiding in Your Kitchen The law \u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/05\/a943a3f934a2314379c4945757accffb.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/05\/a943a3f934a2314379c4945757accffb.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/05\/a943a3f934a2314379c4945757accffb.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/05\/a943a3f934a2314379c4945757accffb.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/05\/a943a3f934a2314379c4945757accffb.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":56449,"url":"https:\/\/phys-edu.net\/wp\/?p=56449&lang=en","url_meta":{"origin":56609,"position":1},"title":"Now You See It, Now You Don\u2019t! 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