{"id":571650,"date":"2026-07-29T10:35:07","date_gmt":"2026-07-29T03:35:07","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=571650"},"modified":"2026-07-29T10:35:07","modified_gmt":"2026-07-29T03:35:07","slug":"ba-dinh-luat-niu-ton","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/ba-dinh-luat-niu-ton\/","title":{"rendered":"Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n: n\u1ed9i dung, c\u00f4ng th\u1ee9c v\u00e0 b\u00e0i t\u1eadp"},"content":{"rendered":"<p><strong>Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n (Newton) l\u00e0 ba \u0111\u1ecbnh lu\u1eadt n\u1ec1n t\u1ea3ng c\u1ee7a c\u01a1 h\u1ecdc c\u1ed5 \u0111i\u1ec3n, m\u00f4 t\u1ea3 m\u1ed1i quan h\u1ec7 gi\u1eefa l\u1ef1c t\u00e1c d\u1ee5ng v\u00e0 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a v\u1eadt: \u0111\u1ecbnh lu\u1eadt I v\u1ec1 qu\u00e1n t\u00ednh, \u0111\u1ecbnh lu\u1eadt II v\u1ec1 gia t\u1ed1c v\u1edbi c\u00f4ng th\u1ee9c F = m\u00b7a, v\u00e0 \u0111\u1ecbnh lu\u1eadt III v\u1ec1 l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c.<\/strong> \u0110\u00e2y l\u00e0 ph\u1ea7n ki\u1ebfn th\u1ee9c tr\u1ecdng t\u00e2m c\u1ee7a V\u1eadt l\u00fd l\u1edbp 10, \u0111\u1ed3ng th\u1eddi l\u00e0 c\u00f4ng c\u1ee5 \u0111\u1ec3 gi\u1ea3i h\u1ea7u h\u1ebft b\u00e0i to\u00e1n \u0111\u1ed9ng l\u1ef1c h\u1ecdc. D\u01b0\u1edbi \u0111\u00e2y b\u1ea1n s\u1ebd t\u00ecm th\u1ea5y n\u1ed9i dung ph\u00e1t bi\u1ec3u chu\u1ea9n c\u1ee7a t\u1eebng \u0111\u1ecbnh lu\u1eadt, c\u00f4ng th\u1ee9c k\u00e8m \u0111\u01a1n v\u1ecb, b\u1ea3ng t\u00f3m t\u1eaft, \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf v\u00e0 b\u1ed1n b\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i chi ti\u1ebft t\u1eebng b\u01b0\u1edbc.<\/p>\n<h2>Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n l\u00e0 g\u00ec?<\/h2>\n<p>Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n do nh\u00e0 b\u00e1c h\u1ecdc ng\u01b0\u1eddi Anh Isaac Newton c\u00f4ng b\u1ed1 n\u0103m 1687, l\u00e0 c\u01a1 s\u1edf c\u1ee7a c\u01a1 h\u1ecdc c\u1ed5 \u0111i\u1ec3n. Tr\u01b0\u1edbc Newton, ng\u01b0\u1eddi ta tin r\u1eb1ng mu\u1ed1n v\u1eadt chuy\u1ec3n \u0111\u1ed9ng th\u00ec ph\u1ea3i li\u00ean t\u1ee5c t\u00e1c d\u1ee5ng l\u1ef1c l\u00ean n\u00f3. Newton ch\u1ec9 ra \u0111i\u1ec1u ng\u01b0\u1ee3c l\u1ea1i: l\u1ef1c kh\u00f4ng duy tr\u00ec chuy\u1ec3n \u0111\u1ed9ng, l\u1ef1c l\u00e0m <em>thay \u0111\u1ed5i<\/em> chuy\u1ec3n \u0111\u1ed9ng.<\/p>\n<p>Ba \u0111\u1ecbnh lu\u1eadt tr\u1ea3 l\u1eddi ba c\u00e2u h\u1ecfi kh\u00e1c nhau:<\/p>\n<ul>\n<li><strong>\u0110\u1ecbnh lu\u1eadt I:<\/strong> Khi n\u00e0o v\u1eadt gi\u1eef nguy\u00ean tr\u1ea1ng th\u00e1i chuy\u1ec3n \u0111\u1ed9ng?<\/li>\n<li><strong>\u0110\u1ecbnh lu\u1eadt II:<\/strong> Khi c\u00f3 l\u1ef1c, v\u1eadt thay \u0111\u1ed5i v\u1eadn t\u1ed1c nhanh ch\u1eadm ra sao?<\/li>\n<li><strong>\u0110\u1ecbnh lu\u1eadt III:<\/strong> L\u1ef1c gi\u1eefa hai v\u1eadt t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau nh\u01b0 th\u1ebf n\u00e0o?<\/li>\n<\/ul>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-571657\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-1.jpg\" alt=\"dinh-luat-niu-ton-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>\u0110\u1ecbnh lu\u1eadt I Niu-t\u01a1n (\u0111\u1ecbnh lu\u1eadt qu\u00e1n t\u00ednh)<\/h2>\n<p><strong>Ph\u00e1t bi\u1ec3u:<\/strong> N\u1ebfu m\u1ed9t v\u1eadt kh\u00f4ng ch\u1ecbu t\u00e1c d\u1ee5ng c\u1ee7a l\u1ef1c n\u00e0o ho\u1eb7c h\u1ee3p l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt b\u1eb1ng 0 th\u00ec v\u1eadt \u0111ang \u0111\u1ee9ng y\u00ean s\u1ebd ti\u1ebfp t\u1ee5c \u0111\u1ee9ng y\u00ean, v\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng s\u1ebd ti\u1ebfp t\u1ee5c chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng \u0111\u1ec1u.<\/p>\n<p>\u0110i\u1ec1u ki\u1ec7n c\u1ee7a \u0111\u1ecbnh lu\u1eadt vi\u1ebft g\u1ecdn l\u00e0 <strong>F<sub>hl<\/sub> = 0<\/strong>, khi \u0111\u00f3 gia t\u1ed1c a = 0 v\u00e0 v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt kh\u00f4ng \u0111\u1ed5i c\u1ea3 v\u1ec1 h\u01b0\u1edbng l\u1eabn \u0111\u1ed9 l\u1edbn.<\/p>\n<h3>Qu\u00e1n t\u00ednh l\u00e0 g\u00ec?<\/h3>\n<p><strong>Qu\u00e1n t\u00ednh<\/strong> l\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a m\u1ecdi v\u1eadt c\u00f3 xu h\u01b0\u1edbng b\u1ea3o to\u00e0n v\u1eadn t\u1ed1c c\u1ee7a m\u00ecnh c\u1ea3 v\u1ec1 h\u01b0\u1edbng v\u00e0 \u0111\u1ed9 l\u1edbn. V\u00ec t\u00ednh ch\u1ea5t n\u00e0y m\u00e0 \u0111\u1ecbnh lu\u1eadt I c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ecbnh lu\u1eadt qu\u00e1n t\u00ednh.<\/p>\n<p><strong>Kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 s\u1ed1 \u0111o m\u1ee9c qu\u00e1n t\u00ednh c\u1ee7a v\u1eadt.<\/strong> V\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng c\u00e0ng l\u1edbn th\u00ec qu\u00e1n t\u00ednh c\u00e0ng l\u1edbn, t\u1ee9c l\u00e0 c\u00e0ng kh\u00f3 l\u00e0m thay \u0111\u1ed5i v\u1eadn t\u1ed1c c\u1ee7a n\u00f3. \u0110\u1ea9y m\u1ed9t chi\u1ebfc xe \u0111\u1ea1p \u0111\u1ee9ng y\u00ean cho chuy\u1ec3n \u0111\u1ed9ng d\u1ec5 h\u01a1n nhi\u1ec1u so v\u1edbi \u0111\u1ea9y m\u1ed9t chi\u1ebfc \u00f4 t\u00f4, v\u00ec kh\u1ed1i l\u01b0\u1ee3ng \u00f4 t\u00f4 l\u1edbn h\u01a1n r\u1ea5t nhi\u1ec1u.<\/p>\n<p>L\u01b0u \u00fd: qu\u00e1n t\u00ednh kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t l\u1ef1c. Kh\u00f4ng t\u1ed3n t\u1ea1i &#8220;l\u1ef1c qu\u00e1n t\u00ednh&#8221; n\u00e0o \u0111\u1ea9y ng\u01b0\u1eddi v\u1ec1 ph\u00eda tr\u01b0\u1edbc khi xe phanh g\u1ea5p trong h\u1ec7 quy chi\u1ebfu m\u1eb7t \u0111\u1ea5t; \u0111\u00f3 ch\u1ec9 l\u00e0 bi\u1ec3u hi\u1ec7n c\u1ee7a vi\u1ec7c c\u01a1 th\u1ec3 mu\u1ed1n gi\u1eef nguy\u00ean v\u1eadn t\u1ed1c c\u0169.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-571659\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-3.jpg\" alt=\"dinh-luat-niu-ton-3\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>\u0110\u1ecbnh lu\u1eadt II Niu-t\u01a1n<\/h2>\n<p><strong>Ph\u00e1t bi\u1ec3u:<\/strong> Gia t\u1ed1c c\u1ee7a m\u1ed9t v\u1eadt c\u00f9ng h\u01b0\u1edbng v\u1edbi l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt. \u0110\u1ed9 l\u1edbn c\u1ee7a gia t\u1ed1c t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c v\u00e0 t\u1ec9 l\u1ec7 ngh\u1ecbch v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt.<\/p>\n<p>C\u00f4ng th\u1ee9c: <strong>a = F\/m<\/strong> hay <strong>F = m \u00b7 a<\/strong><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><strong>F<\/strong> l\u00e0 h\u1ee3p l\u1ef1c c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt, \u0111\u01a1n v\u1ecb niut\u01a1n (N).<\/li>\n<li><strong>m<\/strong> l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt, \u0111\u01a1n v\u1ecb kil\u00f4gam (kg).<\/li>\n<li><strong>a<\/strong> l\u00e0 gia t\u1ed1c c\u1ee7a v\u1eadt, \u0111\u01a1n v\u1ecb m\u00e9t tr\u00ean gi\u00e2y b\u00ecnh ph\u01b0\u01a1ng (m\/s<sup>2<\/sup>).<\/li>\n<\/ul>\n<p>Hai \u0111i\u1ec3m b\u1ea1n c\u1ea7n nh\u1edb k\u1ef9:<\/p>\n<ul>\n<li><strong>Gia t\u1ed1c lu\u00f4n c\u00f9ng h\u01b0\u1edbng v\u1edbi h\u1ee3p l\u1ef1c<\/strong>, kh\u00f4ng ph\u1ea3i c\u00f9ng h\u01b0\u1edbng v\u1edbi v\u1eadn t\u1ed1c. Khi \u00f4 t\u00f4 h\u00e3m phanh, h\u1ee3p l\u1ef1c h\u01b0\u1edbng ng\u01b0\u1ee3c chi\u1ec1u chuy\u1ec3n \u0111\u1ed9ng n\u00ean gia t\u1ed1c c\u0169ng ng\u01b0\u1ee3c chi\u1ec1u chuy\u1ec3n \u0111\u1ed9ng, v\u1eadn t\u1ed1c gi\u1ea3m d\u1ea7n.<\/li>\n<li><strong>\u0110\u01a1n v\u1ecb: 1 N = 1 kg \u00b7 m\/s<sup>2<\/sup><\/strong>. M\u1ed9t niut\u01a1n l\u00e0 l\u1ef1c truy\u1ec1n cho v\u1eadt kh\u1ed1i l\u01b0\u1ee3ng 1 kg m\u1ed9t gia t\u1ed1c 1 m\/s<sup>2<\/sup>.<\/li>\n<\/ul>\n<p>M\u1ed9t h\u1ec7 qu\u1ea3 quen thu\u1ed9c c\u1ee7a \u0111\u1ecbnh lu\u1eadt II l\u00e0 c\u00f4ng th\u1ee9c tr\u1ecdng l\u1ef1c <strong>P = m \u00b7 g<\/strong>, trong \u0111\u00f3 g l\u00e0 gia t\u1ed1c r\u01a1i t\u1ef1 do (th\u01b0\u1eddng l\u1ea5y g = 9,8 m\/s<sup>2<\/sup> ho\u1eb7c l\u00e0m tr\u00f2n 10 m\/s<sup>2<\/sup>). B\u1ea1n c\u00f3 th\u1ec3 xem th\u00eam b\u00e0i ph\u00e2n t\u00edch chi ti\u1ebft v\u1ec1 <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/trong-luc-la-gi\/\">tr\u1ecdng l\u1ef1c v\u00e0 c\u00f4ng th\u1ee9c t\u00ednh tr\u1ecdng l\u01b0\u1ee3ng<\/a> \u0111\u1ec3 hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c nhau gi\u1eefa kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng.<\/p>\n<h2>\u0110\u1ecbnh lu\u1eadt III Niu-t\u01a1n (l\u1ef1c v\u00e0 ph\u1ea3n l\u1ef1c)<\/h2>\n<p><strong>Ph\u00e1t bi\u1ec3u:<\/strong> Khi v\u1eadt A t\u00e1c d\u1ee5ng l\u00ean v\u1eadt B m\u1ed9t l\u1ef1c th\u00ec \u0111\u1ed3ng th\u1eddi v\u1eadt B c\u0169ng t\u00e1c d\u1ee5ng tr\u1edf l\u1ea1i v\u1eadt A m\u1ed9t l\u1ef1c. Hai l\u1ef1c n\u00e0y c\u00f9ng ph\u01b0\u01a1ng, ng\u01b0\u1ee3c chi\u1ec1u, c\u00f3 \u0111\u1ed9 l\u1edbn b\u1eb1ng nhau.<\/p>\n<p>Bi\u1ec3u th\u1ee9c vect\u01a1: <strong>F<sub>AB<\/sub> = \u2212 F<sub>BA<\/sub><\/strong><\/p>\n<h3>V\u00ec sao l\u1ef1c v\u00e0 ph\u1ea3n l\u1ef1c kh\u00f4ng tri\u1ec7t ti\u00eau nhau?<\/h3>\n<p>\u0110\u00e2y l\u00e0 ch\u1ed7 h\u1ecdc sinh nh\u1ea7m nhi\u1ec1u nh\u1ea5t. Hai l\u1ef1c tr\u1ef1c \u0111\u1ed1i ch\u1ec9 tri\u1ec7t ti\u00eau nhau khi ch\u00fang c\u00f9ng \u0111\u1eb7t v\u00e0o <em>m\u1ed9t<\/em> v\u1eadt. Trong khi \u0111\u00f3, <strong>l\u1ef1c v\u00e0 ph\u1ea3n l\u1ef1c lu\u00f4n \u0111\u1eb7t v\u00e0o hai v\u1eadt kh\u00e1c nhau<\/strong>: m\u1ed9t l\u1ef1c \u0111\u1eb7t v\u00e0o v\u1eadt A, l\u1ef1c kia \u0111\u1eb7t v\u00e0o v\u1eadt B. V\u00ec kh\u00f4ng c\u00f9ng \u0111i\u1ec3m \u0111\u1eb7t tr\u00ean c\u00f9ng m\u1ed9t v\u1eadt n\u00ean ch\u00fang kh\u00f4ng th\u1ec3 c\u00e2n b\u1eb1ng nhau, v\u00e0 m\u1ed7i v\u1eadt v\u1eabn thu \u0111\u01b0\u1ee3c gia t\u1ed1c ri\u00eang theo \u0111\u1ecbnh lu\u1eadt II.<\/p>\n<p>V\u00ed d\u1ee5: b\u1ea1n \u0111\u1ea9y t\u01b0\u1eddng m\u1ed9t l\u1ef1c 100 N, t\u01b0\u1eddng \u0111\u1ea9y l\u1ea1i b\u1ea1n \u0111\u00fang 100 N. B\u1ea1n kh\u00f4ng b\u1ecb bay ra sau v\u00ec c\u00f2n c\u00f3 l\u1ef1c ma s\u00e1t ngh\u1ec9 c\u1ee7a s\u00e0n gi\u1eef ch\u00e2n b\u1ea1n l\u1ea1i. N\u1ebfu b\u1ea1n \u0111\u1ee9ng tr\u00ean s\u00e0n b\u0103ng tr\u01a1n tr\u01b0\u1ee3t, ch\u00ednh l\u1ef1c ph\u1ea3n t\u00e1c d\u1ee5ng c\u1ee7a t\u01b0\u1eddng s\u1ebd \u0111\u1ea9y b\u1ea1n tr\u01b0\u1ee3t ra xa.<\/p>\n<p>\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a c\u1eb7p l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c:<\/p>\n<ul>\n<li>Lu\u00f4n xu\u1ea5t hi\u1ec7n v\u00e0 m\u1ea5t \u0111i \u0111\u1ed3ng th\u1eddi.<\/li>\n<li>C\u00f9ng lo\u1ea1i (\u0111\u1ec1u l\u00e0 l\u1ef1c h\u1ea5p d\u1eabn, ho\u1eb7c \u0111\u1ec1u l\u00e0 l\u1ef1c \u0111\u00e0n h\u1ed3i, ho\u1eb7c \u0111\u1ec1u l\u00e0 l\u1ef1c ma s\u00e1t&#8230;).<\/li>\n<li>C\u00f9ng \u0111\u1ed9 l\u1edbn, c\u00f9ng gi\u00e1, ng\u01b0\u1ee3c chi\u1ec1u.<\/li>\n<li>\u0110\u1eb7t v\u00e0o hai v\u1eadt kh\u00e1c nhau n\u00ean kh\u00f4ng c\u00e2n b\u1eb1ng nhau.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-571660\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-4.jpg\" alt=\"dinh-luat-niu-ton-4\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-4.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-4-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-4-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>B\u1ea3ng t\u00f3m t\u1eaft ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u0110\u1ecbnh lu\u1eadt<\/th>\n<th>N\u1ed9i dung ch\u00ednh<\/th>\n<th>C\u00f4ng th\u1ee9c<\/th>\n<th>\u00dd ngh\u0129a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0110\u1ecbnh lu\u1eadt I<\/td>\n<td>H\u1ee3p l\u1ef1c b\u1eb1ng 0 th\u00ec v\u1eadt gi\u1eef nguy\u00ean tr\u1ea1ng th\u00e1i \u0111\u1ee9ng y\u00ean ho\u1eb7c chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng \u0111\u1ec1u<\/td>\n<td>F<sub>hl<\/sub> = 0 \u2192 a = 0<\/td>\n<td>N\u00eau l\u00ean t\u00ednh qu\u00e1n t\u00ednh c\u1ee7a v\u1eadt<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ecbnh lu\u1eadt II<\/td>\n<td>Gia t\u1ed1c c\u00f9ng h\u01b0\u1edbng h\u1ee3p l\u1ef1c, t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi l\u1ef1c v\u00e0 t\u1ec9 l\u1ec7 ngh\u1ecbch v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng<\/td>\n<td>F = m \u00b7 a (1 N = 1 kg\u00b7m\/s<sup>2<\/sup>)<\/td>\n<td>\u0110\u1ecbnh l\u01b0\u1ee3ng quan h\u1ec7 l\u1ef1c \u2013 gia t\u1ed1c<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ecbnh lu\u1eadt III<\/td>\n<td>L\u1ef1c v\u00e0 ph\u1ea3n l\u1ef1c c\u00f9ng \u0111\u1ed9 l\u1edbn, ng\u01b0\u1ee3c chi\u1ec1u, \u0111\u1eb7t v\u00e0o hai v\u1eadt kh\u00e1c nhau<\/td>\n<td>F<sub>AB<\/sub> = \u2212 F<sub>BA<\/sub><\/td>\n<td>M\u00f4 t\u1ea3 t\u01b0\u01a1ng t\u00e1c lu\u00f4n c\u00f3 hai chi\u1ec1u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n<\/h2>\n<ul>\n<li><strong>D\u00e2y an to\u00e0n v\u00e0 t\u00fai kh\u00ed tr\u00ean \u00f4 t\u00f4 (\u0111\u1ecbnh lu\u1eadt I):<\/strong> khi xe d\u1eebng \u0111\u1ed9t ng\u1ed9t, c\u01a1 th\u1ec3 do qu\u00e1n t\u00ednh v\u1eabn mu\u1ed1n gi\u1eef v\u1eadn t\u1ed1c c\u0169 n\u00ean lao v\u1ec1 ph\u00eda tr\u01b0\u1edbc. D\u00e2y an to\u00e0n gi\u1eef ng\u01b0\u1eddi l\u1ea1i, t\u00fai kh\u00ed k\u00e9o d\u00e0i th\u1eddi gian va ch\u1ea1m n\u00ean gi\u1ea3m l\u1ef1c t\u00e1c d\u1ee5ng.<\/li>\n<li><strong>T\u1ef1a \u0111\u1ea7u gh\u1ebf xe (\u0111\u1ecbnh lu\u1eadt I):<\/strong> khi b\u1ecb xe kh\u00e1c t\u00f4ng t\u1eeb ph\u00eda sau, th\u00e2n ng\u01b0\u1eddi b\u1ecb \u0111\u1ea9y t\u1edbi tr\u01b0\u1edbc c\u00f2n \u0111\u1ea7u c\u00f3 xu h\u01b0\u1edbng \u0111\u1ee9ng y\u00ean, t\u1ef1a \u0111\u1ea7u gi\u00fap h\u1ea1n ch\u1ebf ch\u1ea5n th\u01b0\u01a1ng c\u1ed5.<\/li>\n<li><strong>T\u00ednh l\u1ef1c k\u00e9o c\u1ee7a \u0111\u1ed9ng c\u01a1 (\u0111\u1ecbnh lu\u1eadt II):<\/strong> k\u1ef9 s\u01b0 d\u1ef1a v\u00e0o F = m\u00b7a \u0111\u1ec3 ch\u1ecdn c\u00f4ng su\u1ea5t \u0111\u1ed9ng c\u01a1 \u0111\u1ee7 t\u0103ng t\u1ed1c cho kh\u1ed1i l\u01b0\u1ee3ng xe thi\u1ebft k\u1ebf.<\/li>\n<li><strong>S\u00fang gi\u1eadt l\u00f9i khi b\u1eafn (\u0111\u1ecbnh lu\u1eadt III):<\/strong> s\u00fang \u0111\u1ea9y vi\u00ean \u0111\u1ea1n v\u1ec1 ph\u00eda tr\u01b0\u1edbc, \u0111\u1ea1n \u0111\u1ea9y s\u00fang v\u1ec1 ph\u00eda sau v\u1edbi l\u1ef1c b\u1eb1ng \u0111\u00fang nh\u01b0 v\u1eady.<\/li>\n<li><strong>T\u00ean l\u1eeda v\u00e0 m\u00e1y bay ph\u1ea3n l\u1ef1c (\u0111\u1ecbnh lu\u1eadt III):<\/strong> \u0111\u1ed9ng c\u01a1 ph\u1ee5t kh\u00ed n\u00f3ng v\u1ec1 ph\u00eda sau, kh\u1ed1i kh\u00ed \u0111\u1ea9y t\u00ean l\u1eeda ti\u1ebfn v\u1ec1 ph\u00eda tr\u01b0\u1edbc. \u0110\u00e2y l\u00e0 l\u00fd do t\u00ean l\u1eeda v\u1eabn bay \u0111\u01b0\u1ee3c trong ch\u00e2n kh\u00f4ng, n\u01a1i kh\u00f4ng c\u00f3 g\u00ec \u0111\u1ec3 &#8220;\u0111\u1ea9y v\u00e0o&#8221;.<\/li>\n<li><strong>B\u01a1i l\u1ed9i, \u0111i b\u1ed9 (\u0111\u1ecbnh lu\u1eadt III):<\/strong> b\u1ea1n \u0111\u1ea1p n\u01b0\u1edbc ho\u1eb7c \u0111\u1ea1p m\u1eb7t \u0111\u1ea5t v\u1ec1 ph\u00eda sau, n\u01b0\u1edbc v\u00e0 m\u1eb7t \u0111\u1ea5t \u0111\u1ea9y b\u1ea1n ti\u1ebfn l\u00ean ph\u00eda tr\u01b0\u1edbc.<\/li>\n<\/ul>\n<h2>B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n c\u00f3 l\u1eddi gi\u1ea3i<\/h2>\n<h3>B\u00e0i 1: T\u00ednh gia t\u1ed1c khi bi\u1ebft l\u1ef1c v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng<\/h3>\n<p><strong>\u0110\u1ec1:<\/strong> M\u1ed9t v\u1eadt kh\u1ed1i l\u01b0\u1ee3ng 2 kg \u0111ang n\u1eb1m tr\u00ean m\u1eb7t s\u00e0n nh\u1eb5n, ch\u1ecbu t\u00e1c d\u1ee5ng c\u1ee7a h\u1ee3p l\u1ef1c 10 N theo ph\u01b0\u01a1ng ngang. T\u00ednh gia t\u1ed1c c\u1ee7a v\u1eadt.<\/p>\n<p><strong>T\u00f3m t\u1eaft:<\/strong> m = 2 kg; F = 10 N; a = ?<\/p>\n<p><strong>C\u00f4ng th\u1ee9c:<\/strong> theo \u0111\u1ecbnh lu\u1eadt II Niu-t\u01a1n, a = F\/m.<\/p>\n<p><strong>Thay s\u1ed1:<\/strong> a = 10 \/ 2 = 5.<\/p>\n<p><strong>K\u1ebft qu\u1ea3:<\/strong> a = <strong>5 m\/s<sup>2<\/sup><\/strong>, gia t\u1ed1c c\u00f9ng h\u01b0\u1edbng v\u1edbi l\u1ef1c t\u00e1c d\u1ee5ng.<\/p>\n<h3>B\u00e0i 2: T\u00ednh l\u1ef1c k\u00e9o c\u1ee7a \u0111\u1ed9ng c\u01a1 \u00f4 t\u00f4<\/h3>\n<p><strong>\u0110\u1ec1:<\/strong> M\u1ed9t \u00f4 t\u00f4 kh\u1ed1i l\u01b0\u1ee3ng 1.200 kg \u0111ang \u0111\u1ee9ng y\u00ean, sau 10 s \u0111\u1ea1t v\u1eadn t\u1ed1c 20 m\/s. Coi chuy\u1ec3n \u0111\u1ed9ng l\u00e0 th\u1eb3ng nhanh d\u1ea7n \u0111\u1ec1u v\u00e0 b\u1ecf qua ma s\u00e1t. T\u00ednh h\u1ee3p l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean xe.<\/p>\n<p><strong>T\u00f3m t\u1eaft:<\/strong> m = 1.200 kg; v<sub>0<\/sub> = 0; v = 20 m\/s; t = 10 s; F = ?<\/p>\n<p><strong>B\u01b0\u1edbc 1 \u2013 t\u00ednh gia t\u1ed1c:<\/strong> a = (v \u2212 v<sub>0<\/sub>)\/t = (20 \u2212 0)\/10 = 2 m\/s<sup>2<\/sup>.<\/p>\n<p><strong>B\u01b0\u1edbc 2 \u2013 \u00e1p d\u1ee5ng \u0111\u1ecbnh lu\u1eadt II:<\/strong> F = m \u00b7 a = 1.200 \u00d7 2 = 2.400.<\/p>\n<p><strong>K\u1ebft qu\u1ea3:<\/strong> F = <strong>2.400 N<\/strong>, h\u01b0\u1edbng theo chi\u1ec1u chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a xe.<\/p>\n<h3>B\u00e0i 3: B\u00e0i to\u00e1n c\u00f3 l\u1ef1c ma s\u00e1t<\/h3>\n<p><strong>\u0110\u1ec1:<\/strong> K\u00e9o m\u1ed9t th\u00f9ng h\u00e0ng kh\u1ed1i l\u01b0\u1ee3ng 5 kg tr\u00ean s\u00e0n ngang b\u1eb1ng l\u1ef1c 20 N theo ph\u01b0\u01a1ng ngang. L\u1ef1c ma s\u00e1t t\u00e1c d\u1ee5ng l\u00ean th\u00f9ng l\u00e0 5 N. T\u00ednh gia t\u1ed1c c\u1ee7a th\u00f9ng.<\/p>\n<p><strong>T\u00f3m t\u1eaft:<\/strong> m = 5 kg; F<sub>k\u00e9o<\/sub> = 20 N; F<sub>ms<\/sub> = 5 N; a = ?<\/p>\n<p><strong>B\u01b0\u1edbc 1 \u2013 t\u00ednh h\u1ee3p l\u1ef1c:<\/strong> l\u1ef1c ma s\u00e1t ng\u01b0\u1ee3c chi\u1ec1u l\u1ef1c k\u00e9o n\u00ean F<sub>hl<\/sub> = 20 \u2212 5 = 15 N.<\/p>\n<p><strong>B\u01b0\u1edbc 2 \u2013 \u00e1p d\u1ee5ng \u0111\u1ecbnh lu\u1eadt II:<\/strong> a = F<sub>hl<\/sub>\/m = 15 \/ 5 = 3.<\/p>\n<p><strong>K\u1ebft qu\u1ea3:<\/strong> a = <strong>3 m\/s<sup>2<\/sup><\/strong>, c\u00f9ng chi\u1ec1u v\u1edbi l\u1ef1c k\u00e9o. B\u1ea1n c\u00f3 th\u1ec3 \u00f4n l\u1ea1i c\u00e1ch x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 l\u1edbn v\u00e0 chi\u1ec1u c\u1ee7a <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/luc-ma-sat\/\">l\u1ef1c ma s\u00e1t trong c\u00e1c b\u00e0i to\u00e1n c\u01a1 h\u1ecdc<\/a> tr\u01b0\u1edbc khi l\u00e0m d\u1ea1ng b\u00e0i n\u00e0y.<\/p>\n<h3>B\u00e0i 4: Ph\u00e2n bi\u1ec7t c\u1eb7p l\u1ef1c c\u00e2n b\u1eb1ng v\u00e0 c\u1eb7p l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c<\/h3>\n<p><strong>\u0110\u1ec1:<\/strong> M\u1ed9t ng\u01b0\u1eddi kh\u1ed1i l\u01b0\u1ee3ng 50 kg \u0111\u1ee9ng y\u00ean tr\u00ean s\u00e0n nh\u00e0 n\u1eb1m ngang, l\u1ea5y g = 10 m\/s<sup>2<\/sup>. T\u00ednh l\u1ef1c s\u00e0n \u0111\u1ea9y l\u00ean ng\u01b0\u1eddi v\u00e0 l\u1ef1c ng\u01b0\u1eddi \u00e9p xu\u1ed1ng s\u00e0n. Hai l\u1ef1c n\u00e0o l\u00e0 c\u1eb7p l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c?<\/p>\n<p><strong>T\u00f3m t\u1eaft:<\/strong> m = 50 kg; g = 10 m\/s<sup>2<\/sup>; N = ?; N&#8217; = ?<\/p>\n<p><strong>B\u01b0\u1edbc 1 \u2013 t\u00ednh tr\u1ecdng l\u01b0\u1ee3ng:<\/strong> P = m \u00b7 g = 50 \u00d7 10 = 500 N, h\u01b0\u1edbng th\u1eb3ng \u0111\u1ee9ng xu\u1ed1ng d\u01b0\u1edbi.<\/p>\n<p><strong>B\u01b0\u1edbc 2 \u2013 \u00e1p d\u1ee5ng \u0111\u1ecbnh lu\u1eadt I:<\/strong> ng\u01b0\u1eddi \u0111\u1ee9ng y\u00ean n\u00ean h\u1ee3p l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean ng\u01b0\u1eddi b\u1eb1ng 0, suy ra N = P = 500 N, h\u01b0\u1edbng th\u1eb3ng \u0111\u1ee9ng l\u00ean tr\u00ean.<\/p>\n<p><strong>B\u01b0\u1edbc 3 \u2013 \u00e1p d\u1ee5ng \u0111\u1ecbnh lu\u1eadt III:<\/strong> ng\u01b0\u1eddi \u00e9p xu\u1ed1ng s\u00e0n m\u1ed9t l\u1ef1c N&#8217; c\u00f3 \u0111\u1ed9 l\u1edbn b\u1eb1ng N, t\u1ee9c 500 N, h\u01b0\u1edbng xu\u1ed1ng d\u01b0\u1edbi.<\/p>\n<p><strong>K\u1ebft qu\u1ea3:<\/strong> N = N&#8217; = <strong>500 N<\/strong>. C\u1eb7p l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c l\u00e0 N (s\u00e0n t\u00e1c d\u1ee5ng l\u00ean ng\u01b0\u1eddi) v\u00e0 N&#8217; (ng\u01b0\u1eddi t\u00e1c d\u1ee5ng l\u00ean s\u00e0n) v\u00ec ch\u00fang \u0111\u1eb7t v\u00e0o hai v\u1eadt kh\u00e1c nhau. C\u00f2n N v\u00e0 P ch\u1ec9 l\u00e0 <em>c\u1eb7p l\u1ef1c c\u00e2n b\u1eb1ng<\/em> v\u00ec c\u1ea3 hai c\u00f9ng \u0111\u1eb7t v\u00e0o ng\u01b0\u1eddi.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-571658\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-2.jpg\" alt=\"dinh-luat-niu-ton-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/dinh-luat-niu-ton-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi h\u1ecdc ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n<\/h2>\n<ul>\n<li><strong>Nh\u1ea7m l\u1ef1c v\u00e0 ph\u1ea3n l\u1ef1c v\u1edbi hai l\u1ef1c c\u00e2n b\u1eb1ng.<\/strong> H\u00e3y lu\u00f4n h\u1ecfi: hai l\u1ef1c n\u00e0y \u0111\u1eb7t v\u00e0o m\u1ed9t v\u1eadt hay hai v\u1eadt? C\u00f9ng m\u1ed9t v\u1eadt l\u00e0 l\u1ef1c c\u00e2n b\u1eb1ng, hai v\u1eadt kh\u00e1c nhau m\u1edbi l\u00e0 l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c.<\/li>\n<li><strong>Qu\u00ean \u0111\u1ed5i \u0111\u01a1n v\u1ecb.<\/strong> Kh\u1ed1i l\u01b0\u1ee3ng ph\u1ea3i quy v\u1ec1 kg, qu\u00e3ng \u0111\u01b0\u1eddng v\u1ec1 m\u00e9t, th\u1eddi gian v\u1ec1 gi\u00e2y th\u00ec k\u1ebft qu\u1ea3 m\u1edbi ra \u0111\u00fang niut\u01a1n.<\/li>\n<li><strong>D\u00f9ng l\u1ef1c th\u00e0nh ph\u1ea7n thay v\u00ec h\u1ee3p l\u1ef1c trong c\u00f4ng th\u1ee9c F = m\u00b7a.<\/strong> F trong \u0111\u1ecbnh lu\u1eadt II lu\u00f4n l\u00e0 h\u1ee3p l\u1ef1c c\u1ee7a m\u1ecdi l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt.<\/li>\n<li><strong>Cho r\u1eb1ng v\u1eadt chuy\u1ec3n \u0111\u1ed9ng th\u00ec ph\u1ea3i c\u00f3 l\u1ef1c k\u00e9o.<\/strong> Theo \u0111\u1ecbnh lu\u1eadt I, v\u1eadt chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng \u0111\u1ec1u khi h\u1ee3p l\u1ef1c b\u1eb1ng 0; mu\u1ed1n gi\u1eef t\u1ed1c \u0111\u1ed9 kh\u00f4ng \u0111\u1ed5i ch\u1ec9 c\u1ea7n l\u1ef1c k\u00e9o b\u00f9 \u0111\u00fang l\u1ef1c c\u1ea3n.<\/li>\n<\/ul>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n g\u1ed3m nh\u1eefng \u0111\u1ecbnh lu\u1eadt n\u00e0o?<\/h3>\n<p>G\u1ed3m \u0111\u1ecbnh lu\u1eadt I v\u1ec1 qu\u00e1n t\u00ednh, \u0111\u1ecbnh lu\u1eadt II v\u1ec1 gia t\u1ed1c v\u1edbi c\u00f4ng th\u1ee9c F = m\u00b7a, v\u00e0 \u0111\u1ecbnh lu\u1eadt III v\u1ec1 l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c.<\/p>\n<h3>C\u00f4ng th\u1ee9c c\u1ee7a \u0111\u1ecbnh lu\u1eadt II Niu-t\u01a1n l\u00e0 g\u00ec?<\/h3>\n<p>C\u00f4ng th\u1ee9c l\u00e0 F = m\u00b7a, hay a = F\/m. Trong \u0111\u00f3 F l\u00e0 h\u1ee3p l\u1ef1c t\u00ednh b\u1eb1ng niut\u01a1n, m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng t\u00ednh b\u1eb1ng kil\u00f4gam, a l\u00e0 gia t\u1ed1c t\u00ednh b\u1eb1ng m\/s\u00b2. \u0110\u01a1n v\u1ecb 1 N = 1 kg\u00b7m\/s\u00b2.<\/p>\n<h3>V\u00ec sao l\u1ef1c v\u00e0 ph\u1ea3n l\u1ef1c kh\u00f4ng tri\u1ec7t ti\u00eau nhau?<\/h3>\n<p>V\u00ec hai l\u1ef1c n\u00e0y \u0111\u1eb7t v\u00e0o hai v\u1eadt kh\u00e1c nhau ch\u1ee9 kh\u00f4ng c\u00f9ng \u0111\u1eb7t v\u00e0o m\u1ed9t v\u1eadt. Ch\u1ec9 hai l\u1ef1c c\u00f9ng \u0111\u1eb7t v\u00e0o m\u1ed9t v\u1eadt m\u1edbi c\u00f3 th\u1ec3 c\u00e2n b\u1eb1ng v\u00e0 tri\u1ec7t ti\u00eau t\u00e1c d\u1ee5ng c\u1ee7a nhau.<\/p>\n<h3>Qu\u00e1n t\u00ednh l\u00e0 g\u00ec v\u00e0 c\u00f3 li\u00ean h\u1ec7 g\u00ec v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng?<\/h3>\n<p>Qu\u00e1n t\u00ednh l\u00e0 t\u00ednh ch\u1ea5t b\u1ea3o to\u00e0n v\u1eadn t\u1ed1c c\u1ea3 v\u1ec1 h\u01b0\u1edbng v\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a v\u1eadt. Kh\u1ed1i l\u01b0\u1ee3ng ch\u00ednh l\u00e0 s\u1ed1 \u0111o m\u1ee9c qu\u00e1n t\u00ednh: v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng c\u00e0ng l\u1edbn th\u00ec c\u00e0ng kh\u00f3 thay \u0111\u1ed5i v\u1eadn t\u1ed1c.<\/p>\n<h3>\u0110\u1ecbnh lu\u1eadt I Niu-t\u01a1n \u00e1p d\u1ee5ng khi n\u00e0o?<\/h3>\n<p>\u00c1p d\u1ee5ng khi v\u1eadt kh\u00f4ng ch\u1ecbu l\u1ef1c n\u00e0o t\u00e1c d\u1ee5ng ho\u1eb7c h\u1ee3p l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt b\u1eb1ng 0. Khi \u0111\u00f3 gia t\u1ed1c b\u1eb1ng 0, v\u1eadt \u0111\u1ee9ng y\u00ean ti\u1ebfp t\u1ee5c \u0111\u1ee9ng y\u00ean v\u00e0 v\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng ti\u1ebfp t\u1ee5c chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng \u0111\u1ec1u.<\/p>\n<h3>T\u00ean l\u1eeda bay \u0111\u01b0\u1ee3c trong ch\u00e2n kh\u00f4ng nh\u1edd \u0111\u1ecbnh lu\u1eadt n\u00e0o?<\/h3>\n<p>Nh\u1edd \u0111\u1ecbnh lu\u1eadt III Niu-t\u01a1n. \u0110\u1ed9ng c\u01a1 ph\u1ee5t kh\u1ed1i kh\u00ed n\u00f3ng v\u1ec1 ph\u00eda sau, kh\u1ed1i kh\u00ed \u0111\u00f3 t\u00e1c d\u1ee5ng ng\u01b0\u1ee3c tr\u1edf l\u1ea1i t\u00ean l\u1eeda m\u1ed9t l\u1ef1c c\u00f9ng \u0111\u1ed9 l\u1edbn h\u01b0\u1edbng v\u1ec1 ph\u00eda tr\u01b0\u1edbc n\u00ean t\u00ean l\u1eeda ti\u1ebfn l\u00ean m\u00e0 kh\u00f4ng c\u1ea7n m\u00f4i tr\u01b0\u1eddng b\u00ean ngo\u00e0i.<\/p>\n<p><script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n g\u1ed3m nh\u1eefng \u0111\u1ecbnh lu\u1eadt n\u00e0o?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"G\u1ed3m \u0111\u1ecbnh lu\u1eadt I v\u1ec1 qu\u00e1n t\u00ednh, \u0111\u1ecbnh lu\u1eadt II v\u1ec1 gia t\u1ed1c v\u1edbi c\u00f4ng th\u1ee9c F = m\u00b7a, v\u00e0 \u0111\u1ecbnh lu\u1eadt III v\u1ec1 l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c.\"}},{\"@type\":\"Question\",\"name\":\"C\u00f4ng th\u1ee9c c\u1ee7a \u0111\u1ecbnh lu\u1eadt II Niu-t\u01a1n l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"C\u00f4ng th\u1ee9c l\u00e0 F = m\u00b7a, hay a = F\/m. Trong \u0111\u00f3 F l\u00e0 h\u1ee3p l\u1ef1c t\u00ednh b\u1eb1ng niut\u01a1n, m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng t\u00ednh b\u1eb1ng kil\u00f4gam, a l\u00e0 gia t\u1ed1c t\u00ednh b\u1eb1ng m\/s\u00b2. \u0110\u01a1n v\u1ecb 1 N = 1 kg\u00b7m\/s\u00b2.\"}},{\"@type\":\"Question\",\"name\":\"V\u00ec sao l\u1ef1c v\u00e0 ph\u1ea3n l\u1ef1c kh\u00f4ng tri\u1ec7t ti\u00eau nhau?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"V\u00ec hai l\u1ef1c n\u00e0y \u0111\u1eb7t v\u00e0o hai v\u1eadt kh\u00e1c nhau ch\u1ee9 kh\u00f4ng c\u00f9ng \u0111\u1eb7t v\u00e0o m\u1ed9t v\u1eadt. Ch\u1ec9 hai l\u1ef1c c\u00f9ng \u0111\u1eb7t v\u00e0o m\u1ed9t v\u1eadt m\u1edbi c\u00f3 th\u1ec3 c\u00e2n b\u1eb1ng v\u00e0 tri\u1ec7t ti\u00eau t\u00e1c d\u1ee5ng c\u1ee7a nhau.\"}},{\"@type\":\"Question\",\"name\":\"Qu\u00e1n t\u00ednh l\u00e0 g\u00ec v\u00e0 c\u00f3 li\u00ean h\u1ec7 g\u00ec v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Qu\u00e1n t\u00ednh l\u00e0 t\u00ednh ch\u1ea5t b\u1ea3o to\u00e0n v\u1eadn t\u1ed1c c\u1ea3 v\u1ec1 h\u01b0\u1edbng v\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a v\u1eadt. Kh\u1ed1i l\u01b0\u1ee3ng ch\u00ednh l\u00e0 s\u1ed1 \u0111o m\u1ee9c qu\u00e1n t\u00ednh: v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng c\u00e0ng l\u1edbn th\u00ec c\u00e0ng kh\u00f3 thay \u0111\u1ed5i v\u1eadn t\u1ed1c.\"}},{\"@type\":\"Question\",\"name\":\"\u0110\u1ecbnh lu\u1eadt I Niu-t\u01a1n \u00e1p d\u1ee5ng khi n\u00e0o?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"\u00c1p d\u1ee5ng khi v\u1eadt kh\u00f4ng ch\u1ecbu l\u1ef1c n\u00e0o t\u00e1c d\u1ee5ng ho\u1eb7c h\u1ee3p l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt b\u1eb1ng 0. Khi \u0111\u00f3 gia t\u1ed1c b\u1eb1ng 0, v\u1eadt \u0111\u1ee9ng y\u00ean ti\u1ebfp t\u1ee5c \u0111\u1ee9ng y\u00ean v\u00e0 v\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng ti\u1ebfp t\u1ee5c chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng \u0111\u1ec1u.\"}},{\"@type\":\"Question\",\"name\":\"T\u00ean l\u1eeda bay \u0111\u01b0\u1ee3c trong ch\u00e2n kh\u00f4ng nh\u1edd \u0111\u1ecbnh lu\u1eadt n\u00e0o?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Nh\u1edd \u0111\u1ecbnh lu\u1eadt III Niu-t\u01a1n. \u0110\u1ed9ng c\u01a1 ph\u1ee5t kh\u1ed1i kh\u00ed n\u00f3ng v\u1ec1 ph\u00eda sau, kh\u1ed1i kh\u00ed \u0111\u00f3 t\u00e1c d\u1ee5ng ng\u01b0\u1ee3c tr\u1edf l\u1ea1i t\u00ean l\u1eeda m\u1ed9t l\u1ef1c c\u00f9ng \u0111\u1ed9 l\u1edbn h\u01b0\u1edbng v\u1ec1 ph\u00eda tr\u01b0\u1edbc n\u00ean t\u00ean l\u1eeda ti\u1ebfn l\u00ean m\u00e0 kh\u00f4ng c\u1ea7n m\u00f4i tr\u01b0\u1eddng b\u00ean ngo\u00e0i.\"}}]}\n<\/script><\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>T\u00f3m l\u1ea1i, <strong>ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n g\u1ed3m \u0111\u1ecbnh lu\u1eadt qu\u00e1n t\u00ednh, \u0111\u1ecbnh lu\u1eadt F = m\u00b7a v\u00e0 \u0111\u1ecbnh lu\u1eadt l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c<\/strong>, t\u1ea1o th\u00e0nh n\u1ec1n t\u1ea3ng c\u1ee7a c\u01a1 h\u1ecdc c\u1ed5 \u0111i\u1ec3n. Khi gi\u1ea3i b\u00e0i t\u1eadp, b\u1ea1n n\u00ean theo tr\u00ecnh t\u1ef1: x\u00e1c \u0111\u1ecbnh \u0111\u1ee7 c\u00e1c l\u1ef1c t\u00e1c d\u1ee5ng, t\u00ednh h\u1ee3p l\u1ef1c, r\u1ed3i m\u1edbi \u00e1p d\u1ee5ng \u0111\u1ecbnh lu\u1eadt II \u0111\u1ec3 t\u00ecm gia t\u1ed1c. \u0110\u1eebng qu\u00ean ph\u00e2n bi\u1ec7t c\u1eb7p l\u1ef1c c\u00e2n b\u1eb1ng v\u1edbi c\u1eb7p l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c, \u0111\u00e2y l\u00e0 \u0111i\u1ec3m d\u1ec5 m\u1ea5t \u0111i\u1ec3m nh\u1ea5t. B\u1ea1n c\u00f3 th\u1ec3 luy\u1ec7n th\u00eam ph\u1ea7n \u0111\u1ed9ng h\u1ecdc v\u1edbi <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/cong-thuc-tinh-quang-duong\/\">c\u00e1c c\u00f4ng th\u1ee9c t\u00ednh qu\u00e3ng \u0111\u01b0\u1eddng trong chuy\u1ec3n \u0111\u1ed9ng<\/a> \u0111\u1ec3 ho\u00e0n thi\u1ec7n ki\u1ebfn th\u1ee9c c\u01a1 h\u1ecdc l\u1edbp 10.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n (Newton) l\u00e0 ba \u0111\u1ecbnh lu\u1eadt n\u1ec1n t\u1ea3ng c\u1ee7a c\u01a1 h\u1ecdc c\u1ed5 \u0111i\u1ec3n, m\u00f4 t\u1ea3 m\u1ed1i quan h\u1ec7 gi\u1eefa l\u1ef1c t\u00e1c d\u1ee5ng v\u00e0 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a v\u1eadt: \u0111\u1ecbnh lu\u1eadt I v\u1ec1 qu\u00e1n t\u00ednh, \u0111\u1ecbnh lu\u1eadt II v\u1ec1 gia t\u1ed1c v\u1edbi c\u00f4ng th\u1ee9c F = m\u00b7a, v\u00e0 \u0111\u1ecbnh lu\u1eadt III v\u1ec1 l\u1ef1c \u2013 [&hellip;]<\/p>\n","protected":false},"author":102,"featured_media":571661,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n","_yoast_wpseo_title":"Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n: n\u1ed9i dung, c\u00f4ng th\u1ee9c v\u00e0 b\u00e0i t\u1eadp","_yoast_wpseo_metadesc":"Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n g\u1ed3m \u0111\u1ecbnh lu\u1eadt qu\u00e1n t\u00ednh, c\u00f4ng th\u1ee9c F = m\u00b7a v\u00e0 l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c. Xem n\u1ed9i dung, b\u1ea3ng t\u00f3m t\u1eaft v\u00e0 b\u00e0i t\u1eadp V\u1eadt l\u00fd 10 c\u00f3 l\u1eddi gi\u1ea3i chi ti\u1ebft.","footnotes":""},"categories":[3910,30453],"tags":[],"class_list":["post-571650","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kham-pha","category-kien-thuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n: n\u1ed9i dung, c\u00f4ng th\u1ee9c v\u00e0 b\u00e0i t\u1eadp<\/title>\n<meta name=\"description\" content=\"Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n g\u1ed3m \u0111\u1ecbnh lu\u1eadt qu\u00e1n t\u00ednh, c\u00f4ng th\u1ee9c F = m\u00b7a v\u00e0 l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c. Xem n\u1ed9i dung, b\u1ea3ng t\u00f3m t\u1eaft v\u00e0 b\u00e0i t\u1eadp V\u1eadt l\u00fd 10 c\u00f3 l\u1eddi gi\u1ea3i chi ti\u1ebft.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/ba-dinh-luat-niu-ton\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n: n\u1ed9i dung, c\u00f4ng th\u1ee9c v\u00e0 b\u00e0i t\u1eadp\" \/>\n<meta property=\"og:description\" content=\"Ba \u0111\u1ecbnh lu\u1eadt Niu-t\u01a1n g\u1ed3m \u0111\u1ecbnh lu\u1eadt qu\u00e1n t\u00ednh, c\u00f4ng th\u1ee9c F = m\u00b7a v\u00e0 l\u1ef1c \u2013 ph\u1ea3n l\u1ef1c. 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