{"id":284,"date":"2023-04-19T15:12:29","date_gmt":"2023-04-19T15:12:29","guid":{"rendered":"https:\/\/test2025.zoutianya.com\/?p=284"},"modified":"2025-08-05T15:29:05","modified_gmt":"2025-08-05T07:29:05","slug":"tma-and-pma-of-pulleys","status":"publish","type":"post","link":"https:\/\/www.zoutianya.com\/en\/outdoor-book\/tma-and-pma-of-pulleys\/","title":{"rendered":"Establishment of a rope force multiplication system by means of a pulley block"},"content":{"rendered":"<p>TMA = Theoretical Mechanical Advantage = Theoretical Mechanical Efficiency<\/p>\n<p>PMA = Practical Mechanical Advantage = Practical Mechanical Efficiency<\/p>\n<p><img decoding=\"async\" class=\"lazyload alignnone wp-image-1523 size-large\" src=\"https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190-912x1024.webp\" data-orig-src=\"https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190-912x1024.webp\" alt=\"\" width=\"912\" height=\"1024\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27912%27%20height%3D%271024%27%20viewBox%3D%270%200%20912%201024%27%3E%3Crect%20width%3D%27912%27%20height%3D%271024%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190-200x225.webp 200w, https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190-267x300.webp 267w, https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190-400x449.webp 400w, https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190-500x561.webp 500w, https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190-600x674.webp 600w, https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190-700x786.webp 700w, https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190-768x862.webp 768w, https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190-800x898.webp 800w, https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190-912x1024.webp 912w, https:\/\/www.zoutianya.com\/wp-content\/uploads\/2023\/04\/IMG_4190.webp 1069w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 912px) 100vw, 912px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>TMA = Theo [...]<\/p>","protected":false},"author":1,"featured_media":1522,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[194],"tags":[],"class_list":["post-284","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-outdoor-book"],"_links":{"self":[{"href":"https:\/\/www.zoutianya.com\/en\/wp-json\/wp\/v2\/posts\/284","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zoutianya.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zoutianya.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zoutianya.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zoutianya.com\/en\/wp-json\/wp\/v2\/comments?post=284"}],"version-history":[{"count":0,"href":"https:\/\/www.zoutianya.com\/en\/wp-json\/wp\/v2\/posts\/284\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zoutianya.com\/en\/wp-json\/wp\/v2\/media\/1522"}],"wp:attachment":[{"href":"https:\/\/www.zoutianya.com\/en\/wp-json\/wp\/v2\/media?parent=284"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zoutianya.com\/en\/wp-json\/wp\/v2\/categories?post=284"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zoutianya.com\/en\/wp-json\/wp\/v2\/tags?post=284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}