{"id":13980,"date":"2025-04-20T14:02:23","date_gmt":"2025-04-20T14:02:23","guid":{"rendered":"https:\/\/www.fizika-online.ru\/?page_id=13980"},"modified":"2025-04-20T14:02:23","modified_gmt":"2025-04-20T14:02:23","slug":"%d0%b7%d0%b0%d0%b4%d0%b0%d1%87%d0%b8-%d0%bf%d0%be-%d1%81%d1%82%d0%b0%d1%82%d0%b8%d0%ba%d0%b5-%d0%b8-%d0%b3%d0%b8%d0%b4%d1%80%d0%be%d1%81%d1%82%d0%b0%d1%82%d0%b8%d0%ba%d0%b5-%d0%b7%d0%b0%d0%b4-103","status":"publish","type":"page","link":"https:\/\/www.fizika-online.ru\/?page_id=13980","title":{"rendered":"\u0417\u0430\u0434\u0430\u0447\u0438 \u043f\u043e \u0441\u0442\u0430\u0442\u0438\u043a\u0435 \u0438 \u0433\u0438\u0434\u0440\u043e\u0441\u0442\u0430\u0442\u0438\u043a\u0435. \u0417\u0430\u0434\u0430\u0447\u0430 \u0421\u0442\u0413\u0421\u0442103"},"content":{"rendered":"<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\"><em><strong>\u0417\u0430\u0434\u0430\u0447\u0430<\/strong><\/em>. \u041e\u0434\u043d\u043e\u0440\u043e\u0434\u043d\u044b\u0439 \u0441\u0442\u0435\u0440\u0436\u0435\u043d\u044c <em>\u0410\u0412<\/em> (\u0441\u043c. \u0440\u0438\u0441.) \u043f\u0440\u0438\u043a\u0440\u0435\u043f\u043b\u0435\u043d \u043a \u0432\u0435\u0440\u0442\u0438\u043a\u0430\u043b\u044c\u043d\u043e\u0439 \u0441\u0442\u0435\u043d\u0435 \u043f\u043e\u0441\u0440\u0435\u0434\u0441\u0442\u0432\u043e\u043c \u0448\u0430\u0440\u043d\u0438\u0440\u0430 <em>\u0410<\/em> \u0438 \u0443\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u0443\u0433\u043b\u043e\u043c \u043a \u0432\u0435\u0440\u0442\u0438\u043a\u0430\u043b\u0438\u00a0$\\alpha=60^{\\circ}$ \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0442\u0440\u043e\u0441\u0430 <em>\u0412\u0421<\/em>, \u043e\u0431\u0440\u0430\u0437\u0443\u044e\u0449\u0435\u0433\u043e \u0441 \u043d\u0438\u043c \u0443\u0433\u043e\u043b $\\beta=30^{\\circ}$. \u041e\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u044c \u043c\u043e\u0434\u0443\u043b\u044c \u0438 \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0441\u0438\u043b\u044b \u0440\u0435\u0430\u043a\u0446\u0438\u0438 \u0448\u0430\u0440\u043d\u0438\u0440\u0430, \u0435\u0441\u043b\u0438 \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u043e, \u0447\u0442\u043e \u043c\u0430\u0441\u0441\u0430 \u0441\u0442\u0435\u0440\u0436\u043d\u044f $m=2$ \u043a\u0433.<\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter  wp-image-13979\" src=\"https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/04\/2-35.jpg\" alt=\"\" width=\"191\" height=\"229\" srcset=\"https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/04\/2-35.jpg 268w, https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/04\/2-35-250x300.jpg 250w\" sizes=\"(max-width: 191px) 100vw, 191px\" \/><\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt;\"><span style=\"color: #000000;\"><em><strong>\u0420\u0435\u0448\u0435\u043d\u0438\u0435. <\/strong><\/em>\u041f\u0440\u0438 \u0440\u0435\u0448\u0435\u043d\u0438\u0438 \u0437\u0430\u0434\u0430\u0447\u0438 \u0431\u0443\u0434\u0435\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f <a href=\"https:\/\/www.fizika-online.ru\/?page_id=2478\" target=\"_blank\" rel=\"noopener\">\u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u043e\u043c \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u0437\u0430\u0434\u0430\u0447 \u043f\u043e \u0441\u0442\u0430\u0442\u0438\u043a\u0435<\/a>.<\/span><\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">1. \u0421\u0438\u0441\u0442\u0435\u043c\u0443 \u043e\u0442\u0441\u0447\u0435\u0442\u0430 \u0441\u0432\u044f\u0436\u0435\u043c \u0441 \u0417\u0435\u043c\u043b\u0435\u0439, \u0442\u0430\u043a\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430 \u043e\u0442\u0441\u0447\u0435\u0442\u0430 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0438\u043d\u0435\u0440\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0439.<\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">2. \u0412\u044b\u043f\u043e\u043b\u043d\u0438\u043c \u0447\u0435\u0440\u0442\u0435\u0436 \u0441 \u0443\u043a\u0430\u0437\u0430\u043d\u0438\u0435\u043c \u0432\u0441\u0435\u0445 \u0441\u0438\u043b, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u043d\u0430 \u0442\u0435\u043b\u043e. \u041d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u0441\u0438\u043b\u044b \u0440\u0435\u0430\u043a\u0446\u0438\u0438, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u0439 \u043d\u0430 \u0432\u0435\u0440\u0445\u043d\u0438\u0439 \u043a\u043e\u043d\u0435\u0446 \u0441\u0442\u0435\u0440\u0436\u043d\u044f \u043e\u0434\u043d\u043e\u0437\u043d\u0430\u0447\u043d\u043e \u043d\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043e, \u043c\u043e\u0436\u043d\u043e \u043b\u0438\u0448\u044c \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u043e\u0436\u0438\u0442\u044c, \u0447\u0442\u043e \u043e\u0431\u0449\u0435\u0435 \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 &#8212; \u0432\u043f\u0440\u0430\u0432\u043e \u0438 \u0432\u0432\u0435\u0440\u0445 (\u043f\u0440\u043e\u0442\u0438\u0432 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u0441\u0438\u043b\u044b \u0442\u044f\u0436\u0435\u0441\u0442\u0438 \u0438 \u0441\u0438\u043b\u044b \u043d\u0430\u0442\u044f\u0436\u0435\u043d\u0438\u044f \u0442\u0440\u043e\u0441\u0430 $\\vec{F}$).<\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-13981\" src=\"https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/04\/2-36.jpg\" alt=\"\" width=\"311\" height=\"425\" srcset=\"https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/04\/2-36.jpg 311w, https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/04\/2-36-220x300.jpg 220w\" sizes=\"(max-width: 311px) 100vw, 311px\" \/><\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">3. \u0417\u0430\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u043c \u043f\u0435\u0440\u0432\u043e\u0435 \u0443\u0441\u043b\u043e\u0432\u0438\u0435 \u0440\u0430\u0432\u043d\u043e\u0432\u0435\u0441\u0438\u044f<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$\\vec{N}+\\vec{F}+m\\vec{g}=0$.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u0422\u0430\u043a \u043a\u0430\u043a \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u0441\u0438\u043b\u044b \u0440\u0435\u0430\u043a\u0446\u0438\u0438 \u043e\u0434\u043d\u043e\u0437\u043d\u0430\u0447\u043d\u043e \u043d\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043e, \u0442\u043e \u043f\u0440\u043e\u0435\u043a\u0446\u0438\u0438 \u044d\u0442\u043e\u0439 \u0441\u0438\u043b\u044b \u043d\u0430 \u043a\u043e\u043e\u0440\u0434\u0438\u043d\u0430\u0442\u043d\u044b\u0435 \u043e\u0441\u0438 \u043d\u0435 \u043d\u0430\u0445\u043e\u0434\u0438\u043c. \u041a\u0440\u043e\u043c\u0435 \u044d\u0442\u043e\u0433\u043e \u043d\u0430\u043c \u043f\u043e\u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u0437\u043d\u0430\u0442\u044c \u0443\u0433\u043e\u043b \u043d\u0430\u043a\u043b\u043e\u043d\u0430 \u0432\u0435\u043a\u0442\u043e\u0440\u0430 $\\vec{F}$, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043a \u0433\u043e\u0440\u0438\u0437\u043e\u043d\u0442\u0430\u043b\u044c\u043d\u043e\u0439 \u043e\u0441\u0438:\u00a0<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$\\angle OBC=\\angle ABC+\\angle OBA=\\beta +90^{\\circ}-\\alpha$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$\\angle OBC=30^{\\circ} +90^{\\circ}-60^{\\circ}=60^{\\circ}=\\alpha$.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u0422\u0435\u043f\u0435\u0440\u044c \u043d\u0430\u0445\u043e\u0434\u0438\u043c \u043f\u0440\u043e\u0435\u043a\u0446\u0438\u0438 \u0432\u0435\u043a\u0442\u043e\u0440\u043e\u0432 \u043d\u0430 \u043a\u043e\u043e\u0440\u0434\u0438\u043d\u0430\u0442\u043d\u044b\u0435 \u043e\u0441\u0438, \u0441 \u0443\u0447\u0435\u0442\u043e\u043c \u0441\u0434\u0435\u043b\u0430\u043d\u043d\u044b\u0445 \u0437\u0430\u043c\u0435\u0447\u0430\u043d\u0438\u0439,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$N_x-F\\, cos\\, \\alpha=0$,\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 (1)<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$N_y-mg+F\\, sin\\, \\alpha=0$.\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 (2)<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f \u044d\u0442\u0438 \u0443\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u044f,\u00a0\u043c\u043e\u0436\u043d\u043e \u0431\u0443\u0434\u0435\u0442 \u043d\u0430\u0439\u0442\u0438 \u043c\u043e\u0434\u0443\u043b\u044c \u0441\u0438\u043b\u044b \u0440\u0435\u0430\u043a\u0446\u0438\u0438 \u0447\u0435\u0440\u0435\u0437 \u043f\u0440\u043e\u0435\u043a\u0446\u0438\u0438 \u043d\u0430 \u043a\u043e\u043e\u0440\u0434\u0438\u043d\u0430\u0442\u043d\u044b\u0435 \u043e\u0441\u0438 \u043f\u043e \u0444\u043e\u0440\u043c\u0443\u043b\u0435 $N=\\sqrt{N_x^2+N_y^2}$.<\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\"><!-- Yandex.RTB R-A-1598022-3 --><\/span><\/p>\n<div id=\"yandex_rtb_R-A-1598022-3\"><\/div>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\"><script>window.yaContextCb.push(()=>{\n\tYa.Context.AdvManager.render({\n\t\t\"blockId\": \"R-A-1598022-3\",\n\t\t\"renderTo\": \"yandex_rtb_R-A-1598022-3\"\n\t})\n})\n<\/script><\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">4. \u0414\u043b\u044f \u043d\u0430\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u043c\u043e\u0434\u0443\u043b\u044f \u0441\u0438\u043b\u044b \u0440\u0435\u0430\u043a\u0446\u0438\u0438, \u043d\u0430\u043c \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u0437\u043d\u0430\u0442\u044c \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0435, \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u044e\u0449\u0435\u0435 \u043c\u043e\u0434\u0443\u043b\u044c \u0441\u0438\u043b\u044b $F$. \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u043e \u043e\u0441\u0438 \u0432\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u0432\u044b\u0431\u0435\u0440\u0435\u043c \u0442\u043e\u0447\u043a\u0443 \u043e\u043f\u043e\u0440\u044b \u0441\u0442\u0440\u0435\u0436\u043d\u044f, \u0442\u0430\u043a \u043c\u044b \u0438\u0437\u0431\u0430\u0432\u0438\u043c\u0441\u044f \u043e\u0442 \u043d\u0435 \u043d\u0443\u0436\u043d\u043e\u0433\u043e \u043d\u0430\u043c \u043f\u043e\u043a\u0430 \u0447\u0442\u043e \u0438 \u043d\u0435\u0438\u0437\u0432\u0435\u0441\u0442\u043d\u043e\u0433\u043e \u043c\u043e\u0434\u0443\u043b\u044f \u0441\u0438\u043b\u044b \u0440\u0435\u0430\u043a\u0446\u0438\u0438 \u0432 \u043f\u0440\u0430\u0432\u0438\u043b\u0435 \u043c\u043e\u043c\u0435\u043d\u0442\u043e\u0432.<\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">5. \u041d\u0430 \u0440\u0438\u0441\u0443\u043d\u043a\u0435 \u043f\u043e\u043a\u0430\u0436\u0435\u043c \u043f\u043b\u0435\u0447\u0438 \u0441\u0438\u043b, \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0432\u044b\u0431\u0440\u0430\u043d\u043d\u043e\u0439 \u043e\u0441\u0438. \u041f\u043e\u043c\u043d\u0438\u043c, \u0447\u0442\u043e \u043f\u043b\u0435\u0447\u043e \u0441\u0438\u043b\u044b \u0440\u0430\u0432\u043d\u043e \u0434\u043b\u0438\u043d\u0435 \u043f\u0435\u0440\u043f\u0435\u043d\u0434\u0438\u043a\u0443\u043b\u044f\u0440\u0430, \u043e\u043f\u0443\u0449\u0435\u043d\u043d\u043e\u0433\u043e \u0438\u0437 \u043e\u0441\u0438 \u0432\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u043d\u0430 \u043b\u0438\u043d\u0438\u044e \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u0441\u0438\u043b\u044b.<\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-13982\" src=\"https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/04\/2-37.jpg\" alt=\"\" width=\"348\" height=\"429\" srcset=\"https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/04\/2-37.jpg 348w, https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/04\/2-37-243x300.jpg 243w\" sizes=\"(max-width: 348px) 100vw, 348px\" \/><\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u041f\u043b\u0435\u0447\u0438 \u0441\u0438\u043b \u0432\u044b\u0440\u0430\u0437\u0438\u043c \u0438\u0437 \u043e\u0447\u0435\u0432\u0438\u0434\u043d\u044b\u0445 \u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0441\u043e\u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u0439. \u0421\u0438\u043b\u0430 \u0442\u044f\u0436\u0435\u0441\u0442\u0438, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0430\u044f \u043d\u0430 \u0441\u0442\u0435\u0440\u0436\u0435\u043d\u044c, \u043f\u0440\u0438\u043a\u043b\u0430\u0434\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u043a \u0435\u0433\u043e \u0446\u0435\u043d\u0442\u0440\u0443, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 <\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$\\frac{l_1}{\\frac{l}{2}}=sin\\, \\alpha\\Rightarrow l_1=\\frac{l}{2}\\, sin\\, \\alpha$. <\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u0410\u043d\u0430\u043b\u043e\u0433\u0438\u0447\u043d\u043e \u043d\u0430\u0445\u043e\u0434\u0438\u043c \u043f\u043b\u0435\u0447\u043e \u0441\u0438\u043b\u044b $\\vec{F}$ <\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$\\frac{l_2}{l}=sin\\,\\beta\\Rightarrow l_2=l\\, sin\\,\\beta$.<\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u0417\u0430\u043f\u0438\u0448\u0435\u043c \u043f\u0440\u0430\u0432\u0438\u043b\u043e \u043c\u043e\u043c\u0435\u043d\u0442\u043e\u0432, \u0443\u0447\u0438\u0442\u044b\u0432\u0430\u044f \u0442\u043e, \u043a\u0443\u0434\u0430 \u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u0441\u0442\u0435\u0440\u0436\u0435\u043d\u044c \u043a\u0430\u0436\u0434\u0430\u044f \u0441\u0438\u043b\u0430 \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0432\u044b\u0431\u0440\u0430\u043d\u043d\u043e\u0439 \u043e\u0441\u0438<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$mgl_1-Fl_2=0$.<\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">6. \u041d\u0430\u0445\u043e\u0434\u0438\u043c \u043c\u043e\u0434\u0443\u043b\u044c \u0438\u0441\u043a\u043e\u043c\u043e\u0439 \u0441\u0438\u043b\u044b<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$mg \\cdot \\frac{l}{2}\\, sin\\, \\alpha-Fl\\, sin\\,\\beta=0$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$mg \\, sin\\, \\alpha-2F\\, sin\\,\\beta=0$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$mg \\, sin\\, \\alpha=2F\\, sin\\,\\beta$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$F=\\frac{mg \\, sin\\, \\alpha}{2\\,sin\\,\\beta}$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$F=\\frac{2 \\cdot 10 \\cdot \\frac{\\sqrt{3}}{2}}{2 \\cdot \\frac{1}{2}}=10\\sqrt{3}$ \u041d.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u0422\u0435\u043f\u0435\u0440\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c \u044d\u0442\u043e \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0435 \u0434\u043b\u044f \u043d\u0430\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u043c\u043e\u0434\u0443\u043b\u044f \u0441\u0438\u043b\u044b \u0440\u0435\u0430\u043a\u0446\u0438\u0438. \u0418\u0437 \u0443\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0439 (1) \u0438 (2)<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$N_x=F\\, cos\\, \\alpha$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$N_x=10\\sqrt{3} \\cdot \\frac{1}{2}=5\\sqrt{3}$ \u041d,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$N_y=mg-F\\, sin\\, \\alpha$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$N_y=2 \\cdot 10-10\\sqrt{3} \\cdot \\frac{\\sqrt{3}}{2}=5$ \u041d.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u041f\u043e\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u044b\u0435 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f \u0432 \u0444\u043e\u0440\u043c\u0443\u043b\u0443 \u043d\u0430\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u043c\u043e\u0434\u0443\u043b\u044f \u0441\u0438\u043b\u044b \u0440\u0435\u0430\u043a\u0446\u0438\u0438 \u0447\u0435\u0440\u0435\u0437 \u043f\u0440\u043e\u0435\u043a\u0446\u0438\u0438 \u043d\u0430 \u043a\u043e\u043e\u0440\u0434\u0438\u043d\u0430\u0442\u043d\u044b\u0435 \u043e\u0441\u0438<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$N=\\sqrt{(5\\sqrt{3})^2+5^2}=10$ \u041d.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u041d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0432\u0435\u043a\u0442\u043e\u0440\u0430 \u0441\u0438\u043b\u044b \u0440\u0435\u0430\u043a\u0446\u0438\u0438 \u043d\u0430\u0439\u0434\u0435\u043c \u0447\u0435\u0440\u0435\u0437 \u0442\u0430\u043d\u0433\u0435\u043d\u0441 \u0443\u0433\u043b\u0430 \u0435\u0433\u043e \u043d\u0430\u043a\u043b\u043e\u043d\u0430 \u043a \u0433\u043e\u0440\u0438\u0437\u043e\u043d\u0442\u0430\u043b\u0438<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$tg\\, \\gamma =\\frac{N_y}{N_x}=\\frac{5}{5\\sqrt{3}}=\\frac{1}{\\sqrt{3}}$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$\\gamma =30^{\\circ}$.<\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\"><em><strong>\u041e\u0442\u0432\u0435\u0442:<\/strong><\/em> 10 \u041d \u0438 $30^{\\circ}$.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0417\u0430\u0434\u0430\u0447\u0430. \u041e\u0434\u043d\u043e\u0440\u043e\u0434\u043d\u044b\u0439 \u0441\u0442\u0435\u0440\u0436\u0435\u043d\u044c \u0410\u0412 (\u0441\u043c. \u0440\u0438\u0441.) \u043f\u0440\u0438\u043a\u0440\u0435\u043f\u043b\u0435\u043d \u043a \u0432\u0435\u0440\u0442\u0438\u043a\u0430\u043b\u044c\u043d\u043e\u0439 \u0441\u0442\u0435\u043d\u0435 \u043f\u043e\u0441\u0440\u0435\u0434\u0441\u0442\u0432\u043e\u043c \u0448\u0430\u0440\u043d\u0438\u0440\u0430 \u0410 \u0438 \u0443\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u0443\u0433\u043b\u043e\u043c \u043a \u0432\u0435\u0440\u0442\u0438\u043a\u0430\u043b\u0438\u00a0$\\alpha=60^{\\circ}$ \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0442\u0440\u043e\u0441\u0430 \u0412\u0421, \u043e\u0431\u0440\u0430\u0437\u0443\u044e\u0449\u0435\u0433\u043e \u0441 \u043d\u0438\u043c \u0443\u0433\u043e\u043b $\\beta=30^{\\circ}$. \u041e\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u044c \u043c\u043e\u0434\u0443\u043b\u044c \u0438 \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0441\u0438\u043b\u044b \u0440\u0435\u0430\u043a\u0446\u0438\u0438 \u0448\u0430\u0440\u043d\u0438\u0440\u0430, \u0435\u0441\u043b\u0438 \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u043e, \u0447\u0442\u043e \u043c\u0430\u0441\u0441\u0430 \u0441\u0442\u0435\u0440\u0436\u043d\u044f $m=2$ \u043a\u0433. \u0420\u0435\u0448\u0435\u043d\u0438\u0435. \u041f\u0440\u0438 \u0440\u0435\u0448\u0435\u043d\u0438\u0438 \u0437\u0430\u0434\u0430\u0447\u0438 \u0431\u0443\u0434\u0435\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u043e\u043c \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u0437\u0430\u0434\u0430\u0447 \u043f\u043e \u0441\u0442\u0430\u0442\u0438\u043a\u0435. 1. \u0421\u0438\u0441\u0442\u0435\u043c\u0443\u2026 <span class=\"read-more\"><a href=\"https:\/\/www.fizika-online.ru\/?page_id=13980\">\u0427\u0438\u0442\u0430\u0442\u044c \u0434\u0430\u043b\u0435\u0435 &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.fizika-online.ru\/index.php?rest_route=\/wp\/v2\/pages\/13980"}],"collection":[{"href":"https:\/\/www.fizika-online.ru\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.fizika-online.ru\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.fizika-online.ru\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fizika-online.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13980"}],"version-history":[{"count":1,"href":"https:\/\/www.fizika-online.ru\/index.php?rest_route=\/wp\/v2\/pages\/13980\/revisions"}],"predecessor-version":[{"id":13983,"href":"https:\/\/www.fizika-online.ru\/index.php?rest_route=\/wp\/v2\/pages\/13980\/revisions\/13983"}],"wp:attachment":[{"href":"https:\/\/www.fizika-online.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}