{"id":38976,"date":"2024-12-06T17:47:54","date_gmt":"2024-12-06T17:47:54","guid":{"rendered":"https:\/\/idea.membrane.com\/songwriter\/?p=38976"},"modified":"2024-12-06T17:55:45","modified_gmt":"2024-12-06T17:55:45","slug":"going-gravity-free","status":"publish","type":"post","link":"http:\/\/kingarthur.com\/songwriter\/2024\/12\/06\/going-gravity-free\/","title":{"rendered":"Going Gravity Free"},"content":{"rendered":"<ul>\n<li><a href=\"http:\/\/kingarthur.com\/MegaEpix-Enormous\/multimedia\/VII\/Going-Gravity-Free-0.mp3\"> Going-Gravity-Free-0.mp3<\/a><\/li>\n<li><a href=\"http:\/\/kingarthur.com\/MegaEpix-Enormous\/multimedia\/VII\/Going-Gravity-Free-0.mp4\"> Going-Gravity-Free-0.mp4<\/a><\/li>\n<li><a href=\"http:\/\/kingarthur.com\/MegaEpix-Enormous\/multimedia\/VII\/Going-Gravity-Free-I.mp3\"> Going-Gravity-Free-I.mp3<\/a><\/li>\n<li><a href=\"http:\/\/kingarthur.com\/MegaEpix-Enormous\/multimedia\/VII\/Going-Gravity-Free-I.mp4\"> Going-Gravity-Free-I.mp4<\/a><\/li>\n<li><a href=\"http:\/\/kingarthur.com\/MegaEpix-Enormous\/multimedia\/VII\/Going-Gravity-Free-II.mp3\"> Going-Gravity-Free-II.mp3<\/a><\/li>\n<li><a href=\"http:\/\/kingarthur.com\/MegaEpix-Enormous\/multimedia\/VII\/Going-Gravity-Free-II.mp4\"> Going-Gravity-Free-II.mp4<\/a><\/li>\n<li><a href=\"http:\/\/kingarthur.com\/MegaEpix-Enormous\/multimedia\/VII\/Going-Gravity-Free-Reggae.mp3\"> Going-Gravity-Free-Reggae.mp3<\/a><\/li>\n<li><a href=\"http:\/\/kingarthur.com\/MegaEpix-Enormous\/multimedia\/VII\/Going-Gravity-Free-Reggae.mp4\"> Going-Gravity-Free-Reggae.mp4<\/a><\/li>\n<li><a href=\"http:\/\/kingarthur.com\/MegaEpix-Enormous\/multimedia\/VII\/Going-Gravity-Free-electric-intro.mp3\"> Going-Gravity-Free-electric-intro.mp3<\/a><\/li>\n<\/ul>\n<p>[Intro]<br \/>\nNinety-eight miles per hour<br \/>\n(Freedom will be ours)<br \/>\nIn the head, feeling light<br \/>\n(Taking flight)<\/p>\n<p>[Verse 1]<br \/>\nThat wind<br \/>\n(Is blowing up a storm)<br \/>\nBlow out<br \/>\n(No, not about the norm)<\/p>\n<p>[Bridge]<br \/>\nThat wind<br \/>\n(Cuts me like a knife)<br \/>\nFor sure<br \/>\n(The sheerest of my life)<\/p>\n<p>[Chorus]<br \/>\nIntensity of the velocity<br \/>\n(Getting through to me)<br \/>\nAccuracy of the veracity<br \/>\n(Going gravity free)<br \/>\nCome with me&#8230;?<br \/>\n(Going gravity free)<\/p>\n<p>[Verse 2]<br \/>\nThat wind<br \/>\n(Can lift me off the ground)<br \/>\nWay less<br \/>\n(Weightless I have found)<\/p>\n<p>[Bridge]<br \/>\nThat wind<br \/>\n(Cuts me like a knife)<br \/>\nFor sure<br \/>\n(The sheerest of my life)<\/p>\n<p>[Chorus]<br \/>\nIntensity of the velocity<br \/>\n(Getting through to me)<br \/>\nAccuracy of the veracity<br \/>\n(Going gravity free)<br \/>\nCome with me&#8230;?<br \/>\n(Going gravity free)<\/p>\n<p>[Bridge]<br \/>\nThat wind<br \/>\n(Cuts me like a knife)<br \/>\nFor sure<br \/>\n(The sheerest of my life)<\/p>\n<p>[Chorus]<br \/>\nIntensity of the velocity<br \/>\n(Getting through to me)<br \/>\nAccuracy of the veracity<br \/>\n(Going gravity free)<\/p>\n<p>[Outro]<br \/>\nCome with me&#8230;?<br \/>\n(Going gravity free)<\/p>\n<p>A SCIENCE NOTE<br \/>\nTo make the average-sized person feel &#8220;gravity-free&#8221; or effectively lift them off the ground, the wind speed must create enough upward force to counteract their weight (force due to gravity). Here&#8217;s how we approach the calculation:<\/p>\n<h3>1. <strong>Force due to Gravity (Weight)<\/strong><\/h3>\n<p>The weight of an average person is about <span class=\"katex\"><span class=\"katex-mathml\">700\u2009N700 \\, \\text{N}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">700<\/span><span class=\"mord text\"><span class=\"mord\">N<\/span><\/span><\/span><\/span><\/span> (assuming a mass of 70 kg and gravity of <span class=\"katex\"><span class=\"katex-mathml\">9.8\u2009m\/s29.8 \\, \\text{m\/s}^2<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">9.8<\/span><span class=\"mord\"><span class=\"mord text\">m\/s<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">2<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>).<\/p>\n<h3>2. <strong>Lift Force from Wind<\/strong><\/h3>\n<p>The upward force from the wind depends on its speed, the person&#8217;s body surface area exposed to the wind, and the drag coefficient. The force is given by:<\/p>\n<p><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\">F=12\u03c1v2CdAF = \\frac{1}{2} \\rho v^2 C_d A<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">F<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\">21<\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><span class=\"mord mathnormal\">\u03c1<\/span><span class=\"mord\"><span class=\"mord mathnormal\">v<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">2<\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mord\"><span class=\"mord mathnormal\">C<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">d<\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><span class=\"mord mathnormal\">A<\/span><\/span><\/span><\/span><\/span><\/p>\n<p>Where:<\/p>\n<ul>\n<li><span class=\"katex\"><span class=\"katex-mathml\">FF<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">F<\/span><\/span><\/span><\/span>: Force (N)<\/li>\n<li><span class=\"katex\"><span class=\"katex-mathml\">\u03c1\\rho<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">\u03c1<\/span><\/span><\/span><\/span>: Air density (<span class=\"katex\"><span class=\"katex-mathml\">\u22481.225\u2009kg\/m3\\approx 1.225 \\, \\text{kg\/m}^3<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2248<\/span><\/span><span class=\"base\"><span class=\"mord\">1.225<\/span><span class=\"mord\"><span class=\"mord text\">kg\/m<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">3<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> at sea level)<\/li>\n<li><span class=\"katex\"><span class=\"katex-mathml\">vv<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">v<\/span><\/span><\/span><\/span>: Wind speed (<span class=\"katex\"><span class=\"katex-mathml\">m\/s\\text{m\/s}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord text\"><span class=\"mord\">m\/s<\/span><\/span><\/span><\/span><\/span>)<\/li>\n<li><span class=\"katex\"><span class=\"katex-mathml\">CdC_d<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">C<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">d<\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>: Drag coefficient (typically 1.0\u20131.3 for a standing person)<\/li>\n<li><span class=\"katex\"><span class=\"katex-mathml\">AA<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">A<\/span><\/span><\/span><\/span>: Cross-sectional area exposed to wind (<span class=\"katex\"><span class=\"katex-mathml\">\u22480.5\u2009m2\\approx 0.5 \\, \\text{m}^2<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2248<\/span><\/span><span class=\"base\"><span class=\"mord\">0.5<\/span><span class=\"mord\"><span class=\"mord text\">m<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">2<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> for an average person)<\/li>\n<\/ul>\n<h3>3. <strong>Equating Forces<\/strong><\/h3>\n<p>For the person to feel &#8220;gravity-free,&#8221; the upward force <span class=\"katex\"><span class=\"katex-mathml\">FF<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">F<\/span><\/span><\/span><\/span> must equal their weight <span class=\"katex\"><span class=\"katex-mathml\">WW<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">W<\/span><\/span><\/span><\/span>. Substituting values:<\/p>\n<p><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\">700=12\u00d71.225\u00d7v2\u00d71.2\u00d70.5700 = \\frac{1}{2} \\times 1.225 \\times v^2 \\times 1.2 \\times 0.5<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">700<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\">21<\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><span class=\"mbin\">\u00d7<\/span><\/span><span class=\"base\"><span class=\"mord\">1.225<\/span><span class=\"mbin\">\u00d7<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">v<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">2<\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mbin\">\u00d7<\/span><\/span><span class=\"base\"><span class=\"mord\">1.2<\/span><span class=\"mbin\">\u00d7<\/span><\/span><span class=\"base\"><span class=\"mord\">0.5<\/span><\/span><\/span><\/span><\/span><\/p>\n<p>Solving for <span class=\"katex\"><span class=\"katex-mathml\">vv<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">v<\/span><\/span><\/span><\/span>:<\/p>\n<p><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\">v2=7000.3675\u22481904v^2 = \\frac{700}{0.3675} \\approx 1904<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">v<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">2<\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\">0.3675700<\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><span class=\"mrel\">\u2248<\/span><\/span><span class=\"base\"><span class=\"mord\">1904<\/span><\/span><\/span><\/span><\/span> <span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\">v\u224843.6\u2009m\/s\u2009\u2248157\u2009km\/h\u2009\u224897.6\u2009mphv \\approx 43.6 \\, \\text{m\/s} \\, \\approx 157 \\, \\text{km\/h} \\, \\approx 97.6 \\, \\text{mph}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">v<\/span><span class=\"mrel\">\u2248<\/span><\/span><span class=\"base\"><span class=\"mord\">43.6<\/span><span class=\"mord text\"><span class=\"mord\">m\/s<\/span><\/span><span class=\"mrel\">\u2248<\/span><\/span><span class=\"base\"><span class=\"mord\">157<\/span><span class=\"mord text\"><span class=\"mord\">km\/h<\/span><\/span><span class=\"mrel\">\u2248<\/span><\/span><span class=\"base\"><span class=\"mord\">97.6<\/span><span class=\"mord text\"><span class=\"mord\">mph<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<h3>4. <strong>Conclusion<\/strong><\/h3>\n<p>A wind speed of approximately <strong>43.6 m\/s (97.6 mph)<\/strong> is required to lift an average person off the ground and make them feel &#8220;gravity-free.&#8221; This is roughly the wind speed experienced in a strong Category 2 hurricane.<\/p>\n<h3>From the album &#8220;<a href=\"http:\/\/idea.membrane.com\/songwriter\/tag\/anthropological\/\">Anthropological<\/a>&#8221; by <a href=\"http:\/\/kingarthur.com\/Daniel\/\">Daniel<\/a><\/h3>\n<h3>Also found on the album &#8220;<a href=\"http:\/\/idea.membrane.com\/songwriter\/tag\/say-reggae\/\">Say Reggae<\/a>&#8221; by <a href=\"http:\/\/membrane.com\/rombox\/Narley_Marley\/\">Narley Marley<\/a><\/h3>\n<h2><a href=\"http:\/\/membrane.com\/global_warming\/\">The Human Induced Climate Change Experiment<\/a><\/h2>\n<h2><a href=\"http:\/\/kingarthur.com\/MegaEpix-Enormous\/multimedia\/VII\/\">MegaEpix Enormous<\/a><\/h2>\n","protected":false},"excerpt":{"rendered":"<p>Going-Gravity-Free-0.mp3 Going-Gravity-Free-0.mp4 Going-Gravity-Free-I.mp3 Going-Gravity-Free-I.mp4 Going-Gravity-Free-II.mp3 Going-Gravity-Free-II.mp4 Going-Gravity-Free-Reggae.mp3 Going-Gravity-Free-Reggae.mp4 Going-Gravity-Free-electric-intro.mp3 [Intro] Ninety-eight miles per hour (Freedom will be ours) In the head, feeling light (Taking flight) [Verse 1] That wind (Is blowing up a storm) Blow out (No, not about the norm) [Bridge] That wind (Cuts me like a knife) For sure (The sheerest of my [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[3,9,14,3955,17],"tags":[4053,546,563,4054],"class_list":["post-38976","post","type-post","status-publish","format-standard","hentry","category-4d-music","category-daniel","category-lyrics","category-megaepix-enormous","category-narley-marley-reggae","tag-anthropological","tag-mp4","tag-music-videos","tag-say-reggae"],"_links":{"self":[{"href":"http:\/\/kingarthur.com\/songwriter\/wp-json\/wp\/v2\/posts\/38976","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/kingarthur.com\/songwriter\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/kingarthur.com\/songwriter\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/kingarthur.com\/songwriter\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/kingarthur.com\/songwriter\/wp-json\/wp\/v2\/comments?post=38976"}],"version-history":[{"count":8,"href":"http:\/\/kingarthur.com\/songwriter\/wp-json\/wp\/v2\/posts\/38976\/revisions"}],"predecessor-version":[{"id":38998,"href":"http:\/\/kingarthur.com\/songwriter\/wp-json\/wp\/v2\/posts\/38976\/revisions\/38998"}],"wp:attachment":[{"href":"http:\/\/kingarthur.com\/songwriter\/wp-json\/wp\/v2\/media?parent=38976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/kingarthur.com\/songwriter\/wp-json\/wp\/v2\/categories?post=38976"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/kingarthur.com\/songwriter\/wp-json\/wp\/v2\/tags?post=38976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}