{"id":13297,"date":"2025-02-02T16:14:50","date_gmt":"2025-02-02T16:14:50","guid":{"rendered":"https:\/\/www.fizika-online.ru\/?page_id=13297"},"modified":"2025-02-02T16:14:50","modified_gmt":"2025-02-02T16:14:50","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%d0%b0-42","status":"publish","type":"page","link":"https:\/\/www.fizika-online.ru\/?page_id=13297","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\u044211"},"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>.\u00a0\u041a \u043a\u043e\u043d\u0446\u0443 \u0441\u0442\u0435\u0440\u0436\u043d\u044f <em>\u0410\u0421<\/em> (\u0441\u043c. \u0440\u0438\u0441.) \u0434\u043b\u0438\u043d\u043e\u0439 2 \u043c, \u0443\u043a\u0440\u0435\u043f\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0448\u0430\u0440\u043d\u0438\u0440\u043d\u043e \u043e\u0434\u043d\u0438\u043c \u043a\u043e\u043d\u0446\u043e\u043c \u043a \u0441\u0442\u0435\u043d\u0435, \u0430 \u0441 \u0434\u0440\u0443\u0433\u043e\u0433\u043e \u043a\u043e\u043d\u0446\u0430, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u043e\u0433\u043e \u0442\u0440\u043e\u0441\u043e\u043c <em>\u0412\u0421<\/em> \u0434\u043b\u0438\u043d\u043e\u0439 2,5 \u043c, \u043f\u043e\u0434\u0432\u0435\u0448\u0435\u043d \u0433\u0440\u0443\u0437 \u043c\u0430\u0441\u0441\u043e\u0439 120 \u043a\u0433. \u041d\u0430\u0439\u0434\u0438\u0442\u0435 \u0441\u0438\u043b\u044b, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 \u043f\u0430 \u0442\u0440\u043e\u0441 \u0438 \u0441\u0442\u0435\u0440\u0436\u0435\u043d\u044c.<\/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-13283\" src=\"https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/02\/2-10.jpg\" alt=\"\" width=\"201\" height=\"204\" srcset=\"https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/02\/2-10.jpg 324w, https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/02\/2-10-295x300.jpg 295w\" sizes=\"(max-width: 201px) 100vw, 201px\" \/><\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\"><em><strong>\u0420\u0435\u0448\u0435\u043d\u0438\u0435. <\/strong><\/em>\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. \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\u043e\u0447\u043a\u0443 \u043f\u043e\u0434\u0432\u0435\u0441\u0430 \u0433\u0440\u0443\u0437\u0430.<\/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-13284\" src=\"https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/02\/2-11.jpg\" alt=\"\" width=\"382\" height=\"299\" srcset=\"https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/02\/2-11.jpg 496w, https:\/\/www.fizika-online.ru\/wp-content\/uploads\/2025\/02\/2-11-300x235.jpg 300w\" sizes=\"(max-width: 382px) 100vw, 382px\" \/><\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u0421\u0438\u043b\u0430 $\\vec{F}_1$ &#8212; \u0441\u0438\u043b\u0430, \u0441 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0441\u0442\u0435\u0440\u0436\u0435\u043d\u044c $AC$ \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u0435\u0442 \u043d\u0430 \u043f\u043e\u0434\u0432\u0435\u0441, \u0443\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044f \u0433\u0440\u0443\u0437 (\u043f\u043e \u0442\u0440\u0435\u0442\u044c\u0435\u043c\u0443 \u0437\u0430\u043a\u043e\u043d\u0443 \u041d\u044c\u044e\u0442\u043e\u043d\u0430, \u044d\u0442\u0430 \u0441\u0438\u043b\u0430 \u0440\u0430\u0432\u043d\u0430 \u043f\u043e \u043c\u043e\u0434\u0443\u043b\u044e \u0441\u0438\u043b\u0435 \u0441 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u043f\u043e\u0434\u0432\u0435\u0441 \u0441\u0436\u0438\u043c\u0430\u0435\u0442 \u0441\u0442\u0435\u0440\u0436\u0435\u043d\u044c). \u0421\u0438\u043b\u0430 $\\vec{F}_2$ &#8212; \u0441\u0438\u043b\u0430, \u0441 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0442\u0440\u043e\u0441 $BC$ \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u0435\u0442 \u043d\u0430 \u043f\u043e\u0434\u0432\u0435\u0441, \u0443\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044f \u0433\u0440\u0443\u0437 (\u043f\u043e \u0442\u0440\u0435\u0442\u044c\u0435\u043c\u0443 \u0437\u0430\u043a\u043e\u043d\u0443 \u041d\u044c\u044e\u0442\u043e\u043d\u0430, \u044d\u0442\u0430 \u0441\u0438\u043b\u0430 \u0440\u0430\u0432\u043d\u0430 \u043f\u043e \u043c\u043e\u0434\u0443\u043b\u044e \u0441\u0438\u043b\u0435 \u0441 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u043f\u043e\u0434\u0432\u0435\u0441 \u0440\u0430\u0441\u0442\u044f\u0433\u0438\u0432\u0430\u0435\u0442 \u0442\u0440\u043e\u0441). \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;\">$\\vec{F}_1+\\vec{F}_2+\\vec{P}=0$.<\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u0412 \u043f\u0440\u043e\u0435\u043a\u0446\u0438\u044f\u0445 \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;\">$F_1-F_2cos\\, \\alpha =0$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$F_2 \\, sin\\, \\alpha -P=0$.<\/span><\/p>\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;\">\u0418\u0437 \u043f\u0440\u044f\u043c\u043e\u0443\u0433\u043e\u043b\u044c\u043d\u043e\u0433\u043e \u0442\u0440\u0435\u0443\u0433\u043e\u043b\u044c\u043d\u0438\u043a\u0430 $ABC$ \u043c\u043e\u0436\u043d\u043e \u043d\u0430\u0439\u0442\u0438 \u043a\u043e\u0441\u0438\u043d\u0443\u0441, \u0430 \u0437\u0430\u0442\u0435\u043c \u0438 \u0441\u0438\u043d\u0443\u0441 \u0443\u0433\u043b\u0430 $\\alpha$<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$cos\\, \\alpha=\\frac{AC}{BC}=\\frac{2}{2,5}=\\frac{20}{25}=\\frac{4}{5}$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$sin\\, \\alpha =\\sqrt{1-cos^2\\, \\alpha}$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$sin\\, \\alpha =\\sqrt{1-\\left(\\frac{4}{5} \\right)^2}=\\sqrt{1-\\frac{16}{25}}=\\frac{3}{5}$.<\/span><\/p>\n<p><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">\u0412\u0435\u0441 \u043d\u0435\u043f\u043e\u0434\u0432\u0438\u0436\u043d\u043e\u0433\u043e \u0433\u0440\u0443\u0437\u0430 $P=mg$. \u041d\u0430\u0445\u043e\u0434\u0438\u043c \u0438\u0441\u043a\u043e\u043c\u044b\u0439 \u043c\u043e\u0434\u0443\u043b\u044c \u0441\u0438\u043b\u044b $F_2$<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$F_2 \\, sin\\, \\alpha =mg\\Rightarrow F_2=\\frac{mg}{sin\\, \\alpha}$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$F_2=\\frac{120 \\cdot 10}{\\frac{3}{5}}=2000$ \u041d $=2$ \u043a\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 \u043c\u043e\u0436\u043d\u043e \u043d\u0430\u0439\u0442\u0438 \u0438 \u043c\u043e\u0434\u0443\u043b\u044c \u0441\u0438\u043b\u044b $F_1$<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$F_1=F_2\\, cos\\, \\alpha$,<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: georgia, palatino, serif; font-size: 12pt; color: #000000;\">$F_1=2 \\cdot \\frac{4}{5}=1,6$ \u043a\u041d.<\/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>2 \u043a\u041d \u0438 1,6 \u043a\u041d.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0417\u0430\u0434\u0430\u0447\u0430.\u00a0\u041a \u043a\u043e\u043d\u0446\u0443 \u0441\u0442\u0435\u0440\u0436\u043d\u044f \u0410\u0421 (\u0441\u043c. \u0440\u0438\u0441.) \u0434\u043b\u0438\u043d\u043e\u0439 2 \u043c, \u0443\u043a\u0440\u0435\u043f\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0448\u0430\u0440\u043d\u0438\u0440\u043d\u043e \u043e\u0434\u043d\u0438\u043c \u043a\u043e\u043d\u0446\u043e\u043c \u043a \u0441\u0442\u0435\u043d\u0435, \u0430 \u0441 \u0434\u0440\u0443\u0433\u043e\u0433\u043e \u043a\u043e\u043d\u0446\u0430, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u043e\u0433\u043e \u0442\u0440\u043e\u0441\u043e\u043c \u0412\u0421 \u0434\u043b\u0438\u043d\u043e\u0439 2,5 \u043c, \u043f\u043e\u0434\u0432\u0435\u0448\u0435\u043d \u0433\u0440\u0443\u0437 \u043c\u0430\u0441\u0441\u043e\u0439 120 \u043a\u0433. \u041d\u0430\u0439\u0434\u0438\u0442\u0435 \u0441\u0438\u043b\u044b, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 \u043f\u0430 \u0442\u0440\u043e\u0441 \u0438 \u0441\u0442\u0435\u0440\u0436\u0435\u043d\u044c. \u0420\u0435\u0448\u0435\u043d\u0438\u0435. \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. \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\u2026 <span class=\"read-more\"><a href=\"https:\/\/www.fizika-online.ru\/?page_id=13297\">\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\/13297"}],"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=13297"}],"version-history":[{"count":1,"href":"https:\/\/www.fizika-online.ru\/index.php?rest_route=\/wp\/v2\/pages\/13297\/revisions"}],"predecessor-version":[{"id":13298,"href":"https:\/\/www.fizika-online.ru\/index.php?rest_route=\/wp\/v2\/pages\/13297\/revisions\/13298"}],"wp:attachment":[{"href":"https:\/\/www.fizika-online.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}