{"id":18832,"date":"2025-07-06T16:35:04","date_gmt":"2025-07-06T09:35:04","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=18832"},"modified":"2025-07-09T07:05:56","modified_gmt":"2025-07-09T00:05:56","slug":"giai-thich-chi-tiet-ngau-luc-la-gi-va-bai-tap-thuc-hanh-ngau-luc-vat-ly-10","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/giai-thich-chi-tiet-ngau-luc-la-gi-va-bai-tap-thuc-hanh-ngau-luc-vat-ly-10\/","title":{"rendered":"Gi\u1ea3i th\u00edch chi ti\u1ebft ng\u1eabu l\u1ef1c l\u00e0 g\u00ec v\u00e0 b\u00e0i t\u1eadp th\u1ef1c h\u00e0nh ng\u1eabu l\u1ef1c (V\u1eadt L\u00fd 10)"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/giai-thich-chi-tiet-ngau-luc-la-gi-va-bai-tap-thuc-hanh-ngau-luc-vat-ly-10\/#Luc_luong_la_gi\" >L\u1ef1c l\u01b0\u1ee3ng l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/giai-thich-chi-tiet-ngau-luc-la-gi-va-bai-tap-thuc-hanh-ngau-luc-vat-ly-10\/#Anh_huong_cua_luc_ngau_nhien_len_mot_vat_the_ran\" >\u1ea2nh h\u01b0\u1edfng c\u1ee7a l\u1ef1c ng\u1eabu nhi\u00ean l\u00ean m\u1ed9t v\u1eadt th\u1ec3 r\u1eafn<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/giai-thich-chi-tiet-ngau-luc-la-gi-va-bai-tap-thuc-hanh-ngau-luc-vat-ly-10\/#Trong_truong_hop_doi_tuong_khong_co_truc_co_dinh\" >Trong tr\u01b0\u1eddng h\u1ee3p \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng c\u00f3 tr\u1ee5c c\u1ed1 \u0111\u1ecbnh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/giai-thich-chi-tiet-ngau-luc-la-gi-va-bai-tap-thuc-hanh-ngau-luc-vat-ly-10\/#Trong_truong_hop_doi_tuong_co_truc_co_dinh\" >Trong tr\u01b0\u1eddng h\u1ee3p \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 tr\u1ee5c c\u1ed1 \u0111\u1ecbnh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/giai-thich-chi-tiet-ngau-luc-la-gi-va-bai-tap-thuc-hanh-ngau-luc-vat-ly-10\/#Cong_thuc_tinh_toan_mo_-men_xoan_ngau_nhien\" >C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n m\u00f4 -men xo\u1eafn ng\u1eabu nhi\u00ean<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/giai-thich-chi-tiet-ngau-luc-la-gi-va-bai-tap-thuc-hanh-ngau-luc-vat-ly-10\/#Mot_so_bai_tap_luc_Vat_ly_10\" >M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp l\u1ef1c (V\u1eadt l\u00fd 10)<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p dir=\"ltr\">L\u1ef1c l\u01b0\u1ee3ng ng\u1eabu nhi\u00ean l\u00e0 m\u1ed9t trong nh\u1eefng ki\u1ebfn \u200b\u200bth\u1ee9c quan tr\u1ecdng trong ch\u01b0\u01a1ng tr\u00ecnh trung h\u1ecdc n\u00f3i chung v\u00e0 v\u1eadt l\u00fd 10 n\u00f3i ri\u00eang. L\u1ef1c ng\u1eabu nhi\u00ean lu\u00f4n l\u00e0 m\u1ed9t lo\u1ea1i th\u1ebb khi\u1ebfn h\u1ecdc sinh do d\u1ef1 v\u00e0 lo l\u1eafng khi nh\u00ecn th\u1ea5y trong c\u00e1c b\u00e0i t\u1eadp. Bi\u1ebft r\u1eb1ng, kh\u1ec9 \u0111\u00e3 t\u00f3m t\u1eaft t\u1ea5t c\u1ea3 trong l\u1eddi gi\u1ea3i th\u00edch chi ti\u1ebft v\u1ec1 l\u1ef1c ng\u1eabu nhi\u00ean v\u00e0 b\u00e0i t\u1eadp th\u1ef1c h\u00e0nh ng\u1eabu nhi\u00ean th\u00f4ng qua b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<p>                                                                    <\/p>\n<p class=\"title\">H\u00e0ng tri\u1ec7u tr\u1ebb em \u0111\u00e3 ph\u00e1t tri\u1ec3n c\u00e1c k\u1ef9 n\u0103ng ng\u00f4n ng\u1eef c\u1ee7a ch\u00fang th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp c\u1ee7a kh\u1ec9<\/p>\n<p class=\"description\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u1ec1 c\u00e1c s\u1ea3n ph\u1ea9m v\u00e0 tuy\u1ebfn h\u1ecdc h\u1ecdc cho tr\u1ebb em.<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra t\u00ean \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a b\u1ea1n *Vui l\u00f2ng ki\u1ec3m tra s\u1ed1 \u0111i\u1ec7n tho\u1ea1i h\u01a1n 2.000 t\u1eeb &amp; 6.000 c\u00e2u ti\u1ebfng Anh \u0111\u1ec3 ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n 4 k\u1ef9 n\u0103ng ti\u1ebfng Anh t\u1ed1t &#8211; ti\u1ebfng Anh theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7n \u0111\u1ea1i ph\u00e1t tri\u1ec3n kh\u1ea3 n\u0103ng EQ &amp; Vi\u1ec7t Nam *B\u1ea1n ch\u01b0a ch\u1ecdn b\u1ea5t k\u1ef3 m\u1ee5c n\u00e0o! \u0110\u0103ng k\u00fd t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Luc_luong_la_gi\"><\/span>L\u1ef1c l\u01b0\u1ee3ng l\u00e0 g\u00ec? <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">L\u1ef1c ch\u00ednh l\u00e0 h\u1ec7 th\u1ed1ng c\u1ee7a hai l\u1ef1c song song, \u0111\u1ed1i di\u1ec7n, v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 b\u1eb1ng nhau v\u00e0 c\u00f9ng m\u1ed9t hi\u1ec7u \u1ee9ng tr\u00ean m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng<\/p>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t v\u00e0i h\u00ecnh \u1ea3nh c\u1ee7a c\u00e1c v\u00ed d\u1ee5 ng\u1eabu nhi\u00ean:<\/p>\n<p dir=\"ltr\" style=\"line-height: 1.38;margin-top: 0pt;margin-bottom: 0pt;text-align: left\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/ngau-luc_(1)-compressed.jpg\" alt=\"Khi chi\u1ebfc xe \u0111i qua con \u0111\u01b0\u1eddng b\u00ean ph\u1ea3i, ng\u01b0\u1eddi l\u00e1i xe s\u1ebd h\u00e0nh \u0111\u1ed9ng m\u1ed9t l\u1ef1c v\u00e0o v\u00f4 l\u0103ng. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\" height=\"494\"><\/p>\n<p dir=\"ltr\" style=\"line-height: 1.38;margin-top: 0pt;margin-bottom: 0pt\">\n<p dir=\"ltr\" style=\"line-height: 1.38;margin-top: 0pt;margin-bottom: 0pt\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/chuyen-dong-thang-deu_(14)-compressed.jpg\" alt=\"Khi s\u1eed d\u1ee5ng \u1ed1c v\u00edt \u0111\u1ec3 v\u1eb7n \u1ed1c v\u00edt, tay ch\u00fang t\u00f4i \u0111\u00e3 t\u00e1c \u0111\u1ed9ng l\u00ean m\u1ed9t tu\u1ed1c n\u01a1 v\u00edt. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\" height=\"494\"><\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/ngau-luc-compressed.jpg\" alt=\"Bi\u1ebfn v\u00f2i c\u0169ng l\u00e0 ch\u00fang t\u00f4i \u0111\u00e3 l\u00e0m vi\u1ec7c tr\u00ean m\u1ed9t v\u00f2i. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\" height=\"494\"><\/p>\n<p dir=\"ltr\" style=\"line-height: 1.38;margin-top: 0pt;margin-bottom: 0pt\">Do \u0111\u00f3, khi l\u1ef1c ng\u1eabu nhi\u00ean t\u00e1c \u0111\u1ed9ng l\u00ean m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1ec9 l\u00e0m cho \u0111\u1ed1i t\u01b0\u1ee3ng xoay, kh\u00f4ng tinh khi\u1ebft.<\/p>\n<p dir=\"ltr\">\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Anh_huong_cua_luc_ngau_nhien_len_mot_vat_the_ran\"><\/span>\u1ea2nh h\u01b0\u1edfng c\u1ee7a l\u1ef1c ng\u1eabu nhi\u00ean l\u00ean m\u1ed9t v\u1eadt th\u1ec3 r\u1eafn <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Trong_truong_hop_doi_tuong_khong_co_truc_co_dinh\"><\/span>Trong tr\u01b0\u1eddng h\u1ee3p \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng c\u00f3 tr\u1ee5c c\u1ed1 \u0111\u1ecbnh <span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a l\u1ef1c ng\u1eabu nhi\u00ean, n\u00f3 s\u1ebd xoay quanh tr\u1ee5c, \u0111i qua trung t\u00e2m v\u00e0 vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng ch\u1ee9a l\u1ef1c ng\u1eabu nhi\u00ean.<\/p>\n<p dir=\"ltr\">Xu h\u01b0\u1edbng c\u1ee7a ho\u1ea1t \u0111\u1ed9ng ly t\u00e2m c\u1ee7a c\u00e1c ph\u1ea7n tr\u00ean n\u1eb1m \u1edf ph\u00eda \u0111\u1ed1i di\u1ec7n so v\u1edbi ti\u00eau \u0111i\u1ec3m c\u1ee7a nhau, v\u00ec v\u1eady tr\u1ecdng t\u00e2m s\u1ebd \u0111\u1ee9ng y\u00ean. V\u00e0o th\u1eddi \u0111i\u1ec3m \u0111\u00f3, l\u1ef1c quay s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c dung th\u1ee9.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Trong_truong_hop_doi_tuong_co_truc_co_dinh\"><\/span>Trong tr\u01b0\u1eddng h\u1ee3p \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 tr\u1ee5c c\u1ed1 \u0111\u1ecbnh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">D\u01b0\u1edbi \u1ea3nh h\u01b0\u1edfng c\u1ee7a l\u1ef1c s\u1ebd xoay quanh tr\u1ee5c c\u1ed1 \u0111\u1ecbnh v\u00e0 si\u1ebft ch\u1eb7t. Trong tr\u01b0\u1eddng h\u1ee3p tr\u1ee5c quay kh\u00f4ng \u0111i qua ti\u00eau \u0111i\u1ec3m, tr\u1ecdng t\u00e2m s\u1ebd ho\u1ea1t \u0111\u1ed9ng xung quanh tr\u1ee5c \u0111\u00f3. T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 xu h\u01b0\u1edbng ho\u1ea1t \u0111\u1ed9ng \u1edf trung t\u00e2m, v\u00ec v\u1eady n\u00f3 ho\u1ea1t \u0111\u1ed9ng tr\u00ean tr\u1ee5c quay.<\/p>\n<p dir=\"ltr\">Do \u0111\u00f3, khi t\u1ea1o ra c\u00e1c b\u1ed9 ph\u1eadn quay c\u1ee7a m\u00e1y, tr\u1ee5c ph\u1ea3i chuy\u1ec3n qua ti\u00eau \u0111i\u1ec3m theo c\u00e1ch ch\u00ednh x\u00e1c nh\u1ea5t. <\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_toan_mo_-men_xoan_ngau_nhien\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n m\u00f4 -men xo\u1eafn ng\u1eabu nhi\u00ean <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">L\u1ef1c ng\u1eabu nhi\u00ean ch\u1ec9 t\u00e1c \u0111\u1ed9ng l\u00ean m\u1ed9t l\u1ef1c l\u00e0m cho \u0111\u1ed1i t\u01b0\u1ee3ng quay, kh\u00f4ng ti\u1ebfn tri\u1ec3n.<\/p>\n<p dir=\"ltr\">\u0110\u1ed1i v\u1edbi c\u00e1c tr\u1ee5c quay vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng ch\u1ee9a l\u1ef1c ng\u1eabu nhi\u00ean, m\u00f4 -men xo\u1eafn c\u1ee7a l\u1ef1c ng\u1eabu nhi\u00ean kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed tr\u1ee5c quay.<\/p>\n<p dir=\"ltr\">Do \u0111\u00f3, ch\u00fang t\u00f4i c\u00f3 c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n m\u00f4 -men xo\u1eafn ng\u1eabu nhi\u00ean: <\/p>\n<table style=\"border-collapse: collapse;width: 100%;border-color: #4e4c50;border-style: solid;margin-left: auto;margin-right: auto\" border=\"0.5px\">\n<tr>\n<td style=\"border: 0.5px solid #4e4c50\">\n<p dir=\"ltr\" style=\"text-align: center\">M = f1. d1 + f2.d2 = f (d1 + d2) = fd<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M: L\u00e0 m\u00f4 -men xo\u1eafn (NM)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">F: L\u00e0 l\u1ef1c (n)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">D: l\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa hai m\u1ee9c gi\u00e1 c\u1ee7a hai l\u1ef1c l\u01b0\u1ee3ng, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u1ea5n c\u00f4ng tay (M)<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">B\u00ecnh lu\u1eadn:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Khi d = 0 =&gt; m = 0. N\u1ebfu gi\u00e1 c\u1ee7a l\u1ef1c \u0111i qua trung t\u00e2m quay, l\u1ef1c kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 xoay.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M = fd N\u1ebfu b\u1ea1n mu\u1ed1n t\u0103ng m\u00f4 -men xo\u1eafn, ch\u00fang ta c\u00f3 th\u1ec3 t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a l\u1ef1c ho\u1eb7c chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1nh tay.<\/p>\n<\/li>\n<\/ul>\n<p>Xem th\u00eam: Gi\u1ea3i th\u00edch c\u00e1c quy t\u1eafc l\u1ef1c l\u01b0\u1ee3ng song song theo c\u00f9ng m\u1ed9t h\u01b0\u1edbng (c\u1ef1c k\u1ef3 d\u1ec5 hi\u1ec3u)<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_bai_tap_luc_Vat_ly_10\"><\/span>M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp l\u1ef1c (V\u1eadt l\u00fd 10)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">B\u1edfi v\u00ec vi\u1ec7c h\u1ecdc th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn th\u1ef1c h\u00e0nh, Kh\u1ec9 \u0111\u00e3 t\u00f3m t\u1eaft m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp li\u00ean quan \u0111\u1ebfn l\u1ef1c l\u01b0\u1ee3ng \u0111\u01a1n gi\u1ea3n \u0111\u1ebfn n\u00e2ng cao v\u1edbi c\u00e1c h\u01b0\u1edbng d\u1eabn. Hy v\u1ecdng c\u00e1c b\u00e0i t\u1eadp sau s\u1ebd gi\u00fap h\u1ecd n\u1eafm b\u1eaft nhi\u1ec1u ki\u1ebfn \u200b\u200bth\u1ee9c h\u01a1n. <\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp s\u1ed1 1: Vui l\u00f2ng ch\u1ee9ng minh r\u1eb1ng t\u1ed5ng m\u00f4 -men xo\u1eafn c\u1ee7a c\u00e1c l\u1ef1c trong l\u1ef1c ng\u1eabu nhi\u00ean b\u1eb1ng m = fd<\/p>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i quy\u1ebft: L\u1ef1c ng\u1eabu nhi\u00ean t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 tr\u1ee5c<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/bai-tap-ngau-luc-1.JPG\" alt=\"\" width=\"531\" height=\"294\"><\/p>\n<p dir=\"ltr\">C\u00e2u 2: M\u1ed9t thi\u1ebft b\u1ecb kh\u00f4ng gian c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng 70 kg. Trong tr\u01b0\u1eddng h\u1ee3p thi\u1ebft b\u1ecb n\u00e0y c\u1ea5t c\u00e1nh t\u1eeb m\u1eb7t tr\u0103ng, l\u1ef1c n\u00e2ng theo chi\u1ec1u d\u1ecdc, l\u00ean t\u1eeb b\u1ec1 m\u1eb7t m\u1eb7t tr\u0103ng do \u0111\u1ed9ng c\u01a1 t\u00e1c \u0111\u1ed9ng l\u00ean thi\u1ebft b\u1ecb l\u00e0 500 N. gia t\u1ed1c r\u01a1i t\u1ef1 do tr\u00ean b\u1ec1 m\u1eb7t m\u1eb7t tr\u0103ng l\u00e0 1,6m\/m2. Vui l\u00f2ng x\u00e1c \u0111\u1ecbnh:<\/p>\n<ol style=\"list-style-type: lower-alpha\">\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a thi\u1ebft b\u1ecb n\u00e0y khi tr\u00ean m\u1eb7t tr\u0103ng l\u00e0 bao nhi\u00eau? <\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">L\u1ef1c n\u00e2ng v\u00e0 tr\u1ecdng l\u1ef1c c\u1ee7a \u0111\u1ed9ng c\u01a1 ho\u1ea1t \u0111\u1ed9ng bao nhi\u00eau tr\u00ean thi\u1ebft b\u1ecb?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh to\u00e1n gia t\u1ed1c c\u1ee7a thi\u1ebft b\u1ecb khi c\u1ea5t c\u00e1nh t\u1eeb b\u1ec1 m\u1eb7t m\u1eb7t tr\u0103ng?<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i ph\u00e1p: <\/p>\n<ol style=\"list-style-type: lower-alpha\">\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a thi\u1ebft b\u1ecb n\u00e0y khi tr\u00ean m\u1eb7t tr\u0103ng b\u1eb1ng: p = mg = 70.1.6 = 112 N<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ch\u00fang t\u00f4i c\u00f3 l\u1ef1c n\u00e2ng c\u1ee7a \u0111\u1ed9ng c\u01a1: FN = 500 N<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">Tr\u1ecdng l\u1ef1c c\u1ee7a m\u1eb7t tr\u0103ng tr\u00ean thi\u1ebft b\u1ecb: p = 112 N<\/p>\n<p dir=\"ltr\">B\u1edfi v\u00ec hai l\u1ef1c n\u00e0y theo c\u00f9ng m\u1ed9t h\u01b0\u1edbng, theo h\u01b0\u1edbng ng\u01b0\u1ee3c l\u1ea1i, l\u1ef1c n\u00e2ng c\u1ee7a \u0111\u1ed9ng c\u01a1 v\u00e0 tr\u1ecdng l\u1ef1c c\u1ee7a m\u1eb7t tr\u0103ng \u0111\u00e3 ho\u1ea1t \u0111\u1ed9ng tr\u00ean thi\u1ebft b\u1ecb b\u1eb1ng c\u00e1ch: <\/p>\n<p dir=\"ltr\">F = fn &#8211; p = 500 -112 = 388 N<\/p>\n<ol style=\"list-style-type: lower-alpha\" start=\"3\">\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Gia t\u1ed1c c\u1ee7a thi\u1ebft b\u1ecb khi c\u1ea5t c\u00e1nh t\u1eeb b\u1ec1 m\u1eb7t l\u00ean m\u1eb7t tr\u0103ng l\u00e0: <\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">A = f\/m = 388\/70 = 5,33 (m\/s^2) <\/p>\n<p dir=\"ltr\">C\u00e2u 3: M\u1ed9t ng\u01b0\u1eddi n\u1eb7ng 60 kg tr\u00ean m\u1ed9t chi\u1ebfc xe \u0111\u1ea1p v\u1edbi tr\u1ecdng l\u01b0\u1ee3ng 20 kg. Khi b\u1eaft \u0111\u1ea7u, l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean xe l\u00e0 200 N. N\u1ebfu l\u1ef1c tr\u00ean xe \u0111\u1ea1p, b\u1ea1n n\u00ean t\u00ednh to\u00e1n t\u1ed1c \u0111\u1ed9 c\u1ee7a xe \u0111\u1ea1p sau 5s.<\/p>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i ph\u00e1p: <\/p>\n<p dir=\"ltr\">Xe \u0111\u1ea1p \u0111i v\u1edbi gia t\u1ed1c: <\/p>\n<p dir=\"ltr\">A = f\/m = 200\/(60 + 20) = 2,5 (m\/s)<\/p>\n<p dir=\"ltr\">T\u1ed1c \u0111\u1ed9 c\u1ee7a xe \u0111\u1ea1p sau 5s s\u1ebd l\u00e0: <\/p>\n<p dir=\"ltr\">V = V0 + AT = 0 + 2.5.5 = 12,5 (m\/s) <\/p>\n<p dir=\"ltr\">Ngo\u00e0i ra, h\u1ecd c\u0169ng c\u00f3 th\u1ec3 th\u1ef1c h\u00e0nh m\u1ed9t s\u1ed1 ch\u1ee7 \u0111\u1ec1 n\u00e2ng cao d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<p dir=\"ltr\">C\u00e2u 1: M\u1ed9t qu\u1ea3 b\u00f3ng \u0111\u1ed3ng nh\u1ea5t n\u1eb7ng 6 kg \u0111\u01b0\u1ee3c treo tr\u00ean m\u1ed9t b\u1ee9c t\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng nh\u1edd m\u1ed9t s\u1ee3i d\u00e2y. D\u00e2y \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng m\u1ed9t b\u1ee9c t\u01b0\u1eddng g\u00f3c \u03b1. B\u1ecf qua ma s\u00e1t trong ti\u1ebfp x\u00fac v\u1edbi b\u00f3ng v\u1edbi t\u01b0\u1eddng. L\u1ea5y g = 10 m\/s^2. Sau \u0111\u00f3, l\u1ef1c c\u0103ng l\u00e0 kho\u1ea3ng 403. Vui l\u00f2ng x\u00e1c \u0111\u1ecbnh g\u00f3c \u03b1.<\/p>\n<p dir=\"ltr\">C\u00e2u 2: M\u1ed9t v\u1eadt th\u1ec3 r\u1eafn ph\u1eb3ng, m\u1ecfng, m\u1ecfng l\u00e0 m\u1ed9t tam gi\u00e1c \u0111\u1ec1u b\u1eb1ng ABC. M\u1ed7i b\u00ean c\u1ee7a tam gi\u00e1c n\u00e0y l\u00e0 A = 10cm. M\u1ecdi ng\u01b0\u1eddi h\u00e0nh \u0111\u1ed9ng tr\u00ean m\u1ed9t l\u1ef1c l\u01b0\u1ee3ng trong m\u1eb7t ph\u1eb3ng c\u1ee7a tam gi\u00e1c. Bi\u1ebft c\u00e1c l\u1ef1c vu\u00f4ng g\u00f3c v\u1edbi r\u00eca c\u1ee7a AC l\u00e0 10 N v\u00e0 \u0111\u01b0\u1ee3c \u0111\u1eb7t th\u00e0nh hai \u0111\u1ec9nh A v\u00e0 B. Vui l\u00f2ng t\u00ednh m\u00f4 -men xo\u1eafn c\u1ee7a l\u1ef1c ng\u1eabu nhi\u00ean.<\/p>\n<p dir=\"ltr\">C\u00e2u 3: M\u1ed9t qu\u1ea3 b\u00f3ng nh\u1ef1a n\u1eb7ng 40 N \u0111\u01b0\u1ee3c treo tr\u00ean m\u1ed9t b\u1ee9c t\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng nh\u1edd m\u1ed9t chu\u1ed7i ph\u00f9 h\u1ee3p v\u1edbi b\u1ee9c t\u01b0\u1eddng \u1edf g\u00f3c 45. V\u1eady, b\u1ea1n t\u00ednh to\u00e1n ph\u1ea3n \u1ee9ng c\u1ee7a b\u1ee9c t\u01b0\u1eddng tr\u00ean qu\u1ea3 b\u00f3ng bao nhi\u00eau?<\/p>\n<p dir=\"ltr\">C\u00e2u 4: M\u1ed9t ch\u1ea5t r\u1eafn ph\u1eb3ng, m\u1ecfng l\u00e0 m\u1ed9t tam gi\u00e1c \u0111\u1ec1u b\u1eb1ng ABC, m\u1ed7i b\u00ean l\u00e0 A = 20 cm. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ed9t v\u1eadt th\u1ec3 c\u00f3 l\u1ef1c trong m\u1eb7t ph\u1eb3ng c\u1ee7a tam gi\u00e1c. C\u00e1c l\u1ef1c c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 8 N v\u00e0 \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf hai g\u00f3c l\u00e0 A v\u00e0 B. Vui l\u00f2ng t\u00ednh m\u00f4 -men xo\u1eafn c\u1ee7a l\u1ef1c ng\u1eabu nhi\u00ean trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p sau: <\/p>\n<ol style=\"list-style-type: upper-alpha\">\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00e1c l\u1ef1c vu\u00f4ng g\u00f3c v\u1edbi AB<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00e1c l\u1ef1c vu\u00f4ng g\u00f3c v\u1edbi ac<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00e1c l\u1ef1c song song v\u1edbi ac<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\" style=\"line-height: 1.38;margin-top: 0pt;margin-bottom: 0pt\">Tr\u00ean \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ea3n t\u00f3m t\u1eaft v\u1ec1 ki\u1ebfn \u200b\u200bth\u1ee9c v\u00e0 b\u00e0i t\u1eadp li\u00ean quan \u0111\u1ebfn l\u1ef1c l\u01b0\u1ee3ng m\u00e0 kh\u1ec9 \u0111a th\u1ec3 thao. Hy v\u1ecdng, vi\u1ec7c chia s\u1ebb \u1edf tr\u00ean s\u1ebd gi\u00fap h\u1ecd c\u00f3 nhi\u1ec1u n\u1ec1n t\u1ea3ng h\u01a1n \u0111\u1ec3 ho\u00e0n th\u00e0nh t\u1ed1t c\u00e1c b\u00e0i t\u1eadp c\u1ee7a l\u1edbp. Vui l\u00f2ng theo danh s\u00e1ch ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n \u0111\u1ec3 c\u1eadp nh\u1eadt nhi\u1ec1u ki\u1ebfn \u200b\u200bth\u1ee9c kh\u00f4ng ch\u1ec9 li\u00ean quan \u0111\u1ebfn v\u1eadt l\u00fd m\u00e0 c\u00f2n nhi\u1ec1u \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c. N\u1ebfu b\u1ea1n th\u1ea5y b\u00e0i vi\u1ebft hay, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 nh\u1ea5p v\u00e0o n\u00fat Chia s\u1ebb b\u00ean d\u01b0\u1edbi \u0111\u1ec3 nhi\u1ec1u b\u1ea1n bi\u1ebft Kh\u1ec9.<\/p>\n<p>Ngu\u1ed3n: <a href=\"http:\/\/www.ckconitsha.com\/vn\/\">http:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>L\u1ef1c l\u01b0\u1ee3ng ng\u1eabu nhi\u00ean l\u00e0 m\u1ed9t trong nh\u1eefng ki\u1ebfn \u200b\u200bth\u1ee9c quan tr\u1ecdng trong ch\u01b0\u01a1ng tr\u00ecnh trung h\u1ecdc n\u00f3i chung v\u00e0 v\u1eadt l\u00fd 10 n\u00f3i ri\u00eang. L\u1ef1c ng\u1eabu nhi\u00ean lu\u00f4n l\u00e0 m\u1ed9t lo\u1ea1i th\u1ebb khi\u1ebfn h\u1ecdc sinh do d\u1ef1 v\u00e0 lo l\u1eafng khi nh\u00ecn th\u1ea5y trong c\u00e1c b\u00e0i t\u1eadp. Bi\u1ebft r\u1eb1ng, kh\u1ec9 \u0111\u00e3 t\u00f3m t\u1eaft t\u1ea5t&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-18832","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/18832","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=18832"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/18832\/revisions"}],"predecessor-version":[{"id":25534,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/18832\/revisions\/25534"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=18832"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=18832"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=18832"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}