{"id":1145,"date":"2021-10-09T00:45:22","date_gmt":"2021-10-09T00:45:22","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=1145"},"modified":"2021-10-14T22:12:08","modified_gmt":"2021-10-14T15:12:08","slug":"luc-ke-phep-do-luc-trong-luong-va-khoi-luong-vat-ly-6","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/luc-ke-phep-do-luc-trong-luong-va-khoi-luong-vat-ly-6\/","title":{"rendered":"L\u1ef1c k\u1ebf ph\u00e9p \u0111o l\u1ef1c tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng \u2013 V\u1eadt l\u00fd 6"},"content":{"rendered":"\n<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p>Ch\u00fang ta \u0111\u00e3 \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn r\u1ea5t nhi\u1ec1u v\u1ec1 l\u1ef1c. Tuy nhi\u00ean, \u1edf nh\u1eefng b\u00e0i vi\u1ebft tr\u01b0\u1edbc ch\u00fang ta l\u1ea1i ch\u01b0a h\u1ec1 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn d\u1ee5ng c\u1ee5 \u0111\u1ec3 \u0111o \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c. V\u1eady c\u00e1c nh\u00e0 khoa h\u1ecdc, v\u00e0 trong th\u1ef1c t\u1ebf, ng\u01b0\u1eddi ta d\u00f9ng d\u1ee5ng g\u00ec \u0111\u1ec3 \u0111o \u0111\u1ed9 l\u1edbn n\u00e0y? L\u1ef1c k\u1ebf ph\u00e9p \u0111o l\u1ef1c tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng ch\u00ednh l\u00e0 d\u1ee5ng c\u1ee5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u nh\u1ea5t. B\u00e0i vi\u1ebft ng\u00e0y h\u00f4m nay, ch\u00fang ta s\u1ebd c\u00f9ng nhau t\u00ecm hi\u1ec3u v\u1ec1 d\u1ee5ng c\u1ee5 n\u00e0y. H\u01a1n c\u1ea3, c\u00e1c em c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn m\u1ed9t lo\u1ea1i l\u1ef1c m\u1edbi g\u1eafn li\u1ec1n v\u1edbi m\u1ecdi v\u1eadt quanh ta \u2013 Tr\u1ecdng l\u1ef1c. C\u00e1c em c\u00f9ng \u0111\u1ecdc v\u00e0 t\u00ecm hi\u1ec3u ngay nh\u00e9!<\/p>\n\n\n\n<p>Tr\u1ecdng l\u1ef1c l\u00e0 g\u00ec?<\/p>\n\n\n\n<p>Tr\u00e1i \u0111\u1ea5t c\u1ee7a ch\u00fang ta ch\u1ee9a v\u1ea1n v\u1eadt, bao g\u1ed3m c\u1ea3 nh\u1eefng sinh v\u1eadt s\u1ed1ng v\u00e0 nh\u1eefng v\u1eadt v\u00f4 tri v\u00f4 gi\u00e1c. V\u1eady \u0111i\u1ec1u g\u00ec gi\u1eef cho ch\u00fang ta, nh\u1eefng lo\u00e0i sinh v\u1eadt kh\u00e1c, v\u00e0 nh\u1eefng m\u00f3n \u0111\u1ed3 v\u1eadt \u1ea5y kh\u00f4ng b\u1ecb v\u0103ng ra kh\u1ecfi tr\u00e1i \u0111\u1ea5t. Tr\u00e1i \u0111\u1ea5t c\u00f3 t\u00e1c \u0111\u1ed9ng g\u00ec \u0111\u1ebfn con ng\u01b0\u1eddi v\u00e0 v\u1ea1n v\u1eadt t\u1ed3n t\u1ea1i tr\u00ean m\u1eb7t \u0111\u1ea5t hay kh\u00f4ng. S\u1ef1 th\u1eadt l\u00e0 c\u00f3, c\u0169ng ch\u00ednh v\u00ec s\u1ef1 t\u00e1c \u0111\u1ed9ng hay c\u00f2n g\u1ecdi l\u00e0 l\u1ef1c h\u1ea5p d\u1eabn, tr\u1ecdng l\u1ef1c n\u00e0y m\u00e0 ch\u00fang ta v\u00e0 v\u1ea1n v\u1eadt c\u00f3 th\u1ec3 \u0111\u1ee9ng \u0111\u01b0\u1ee3c tr\u00ean m\u1eb7t \u0111\u1ea5t. Hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, tr\u00e1i \u0111\u1ea5t c\u00f3 m\u1ed9t l\u1ef1c h\u00fat v\u1ea1n v\u1ea1n t\u1ed3n t\u1ea1i tr\u00ean tr\u00e1i \u0111\u1ea5t. L\u1ef1c h\u00fat n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Tr\u1ecdng l\u1ef1c.<\/p>\n\n\n\n<p>Tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 g\u00ec?<\/p>\n\n\n\n<p>Theo \u0111\u1ecbnh ngh\u0129a c\u1ee7a c\u00e1c nh\u00e0 khoa h\u1ecdc th\u00ec Tr\u1ecdng L\u1ef1c l\u00e0 l\u1ef1c h\u00fat c\u1ee7a tr\u00e1i \u0111\u1ea5t t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t v\u1eadt. Ph\u01b0\u01a1ng c\u1ee7a tr\u1ecdng l\u1ef1c l\u00e0 ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng, chi\u1ec1u h\u01b0\u1edbng v\u1ec1 t\u00e2m c\u1ee7a tr\u00e1i \u0111\u1ea5t. M\u1ecdi v\u1eadt tr\u00ean tr\u00e1i \u0111\u1ea5t n\u00e0y \u0111\u1ec1u ch\u1ecbu l\u1ef1c h\u1ea5p d\u1eabn c\u1ee7a tr\u00e1i \u0111\u1ea5t. C\u0169ng v\u00ec th\u1ebf m\u00e0 ch\u00fang ta c\u00f3 th\u1ec3 \u0111i l\u1ea1i, \u0111\u1ee9ng y\u00ean tr\u00ean m\u1eb7t \u0111\u1ea5t m\u00e0 kh\u00f4ng b\u1ecb bay l\u00ean hay v\u0103ng ra ngo\u00e0i h\u00e0nh tinh. L\u1ef1c k\u1ebf ph\u00e9p \u0111o tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 d\u1ee5ng c\u1ee5 d\u00f9ng \u0111\u1ec3 \u0111o tr\u1ecdng l\u1ef1c v\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c. C\u00e1c nh\u00e0 khoa h\u1ecdc th\u01b0\u1eddng s\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 \u0111o n\u00e0y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c.<\/p>\n\n\n\n<p>C\u00e1c lo\u1ea1i l\u1ef1c k\u1ebf kh\u00e1c nhau<\/p>\n\n\n\n<p>B\u00ean c\u1ea1nh \u0111\u00f3, ch\u00fang ta c\u00f2n \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn, kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt c\u00f3 t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt \u0111\u00f3. \u0110\u1ed9 l\u1edbn c\u00e0ng cao th\u00ec \u0111\u1ed9 l\u1edbn c\u1ee7a tr\u1ecdng l\u01b0\u1ee3ng c\u00e0ng l\u1edbn. C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ch\u1ee9ng minh \u0111\u01b0\u1ee3c c\u00f4ng th\u1ee9c \u0111\u1ec3 t\u00ednh to\u00e1n tr\u1ecdng l\u01b0\u1ee3ng th\u00f4ng qua kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt nh\u01b0 sau: P=10xm. Trong \u0111\u00f3 P l\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a tr\u1ecdng l\u01b0\u1ee3ng, m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt. \u0110\u1ed1i v\u1edbi c\u00e1c em l\u1edbp 6 h\u1ecdc b\u1ed9 m\u00f4n V\u1eadt l\u00fd th\u00ec c\u00f4ng th\u1ee9c n\u00e0y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng nhi\u1ec1u trong c\u00e1c b\u00e0i t\u1eadp. C\u00e1c em s\u1ebd c\u00f3 nh\u1eefng b\u00e0i v\u1eadn d\u1ee5ng, t\u00ednh to\u00e1n v\u1ec1 tr\u1ecdng l\u01b0\u1ee3ng ho\u1eb7c kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt.<\/p>\n\n\n\n<p>\u0110\u01a1n v\u1ecb \u0111o c\u1ee7a l\u1ef1c<\/p>\n\n\n\n<p>\u0110\u01a1n v\u1ecb \u0111o c\u1ee7a l\u1ef1c \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Newton hay c\u00f2n \u0111\u01b0\u1ee3c k\u00ed hi\u1ec7u l\u00e0 N. \u0110\u00e2y l\u00e0 \u0111\u01a1n v\u1ecb \u0111o c\u1ee7a l\u1ef1c \u0111\u01b0\u1ee3c s\u1ef1 c\u00f4ng nh\u1eadn trong h\u1ec7 \u0111o l\u01b0\u1eddng qu\u1ed1c t\u1ebf (SI). T\u00ean g\u1ecdi c\u1ee7a \u0111\u01a1n v\u1ecb \u0111o n\u00e0y c\u0169ng \u0111\u01b0\u1ee3c \u0111\u1eb7t theo t\u00ean nh\u00e0 b\u00e1c h\u1ecdc Isaac Newton. Tr\u1ecdng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng \u0111\u01a1n v\u1ecb N. \u0110\u1ed9 l\u1edbn l\u1ef1c h\u00fat c\u1ee7a tr\u00e1i \u0111\u1ea5t t\u00e1c d\u1ee5ng l\u00ean v\u1eadt \u0111\u00f3 ch\u00ednh l\u00e0 tr\u1ecdng l\u01b0\u1ee3ng. Khi th\u1ea3 r\u01a1i m\u1ed9t v\u1eadt t\u1eeb tr\u00ean kh\u00f4ng trung, v\u1eadt \u0111\u00f3 r\u01a1i xu\u1ed1ng \u0111\u1ea5t ch\u00ednh l\u00e0 \u0111ang ch\u1ecbu t\u00e1c d\u1ee5ng c\u1ee7a tr\u1ecdng l\u1ef1c. M\u1ed9t v\u1eadt \u0111\u01b0\u1ee3c \u0111\u01b0a l\u00ean c\u00e0ng cao th\u00ec tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt \u0111\u00f3 c\u00e0ng gi\u1ea3m.<\/p>\n\n\n\n<p>L\u1ef1c k\u1ebf \u2013 ph\u00e9p \u0111o l\u1ef1c tr\u1ecdng l\u01b0\u1ee3ng kh\u1ed1i l\u01b0\u1ee3ng<\/p>\n\n\n\n<p>Ng\u01b0\u1eddi ta ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 d\u00f9ng l\u1ef1c k\u1ebf ph\u00e9p \u0111o tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng \u0111\u1ec3 \u0111o tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt. C\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c h\u00e0nh \u0111i\u1ec1u n\u00e0y trong c\u00e1c ti\u1ebft h\u1ecdc V\u1eadt l\u00fd tr\u00ean l\u1edbp. C\u00f4ng th\u1ee9c t\u00ednh tr\u1ecdng l\u1ef1c trong m\u1ecdi tr\u01b0\u1eddng h\u1ee3p l\u00e0 P=mxg. Trong \u0111\u00f3 P l\u00e0 tr\u1ecdng l\u01b0\u1ee3ng c\u00f3 \u0111\u01a1n v\u1ecb l\u00e0 N. C\u00f2n m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng \u0111\u01a1n v\u1ecb kg. K\u00ed hi\u1ec7u g \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0 gia t\u1ed1c. Gia t\u1ed1c c\u00f3 th\u1ec3 thay \u0111\u1ed5i trong c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau. Gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng tr\u00ean m\u1eb7t tr\u1eddi c\u00f3 gi\u00e1 tr\u1ecb kho\u1ea3ng 274 m\/s2, g\u1ea5p kho\u1ea3ng 28 l\u1ea7n Gia t\u1ed1c t\u1ea1i Tr\u00e1i \u0111\u1ea5t. Do \u0111\u00f3, m\u1ecdi v\u1eadt s\u1ebd n\u1eb7ng h\u01a1n 28 l\u1ea7n n\u1ebfu \u1edf tr\u00ean M\u1eb7t tr\u1eddi.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>T\u00ecm hi\u1ec3u th\u00eam v\u1ec1 \u0110\u1ecbnh lu\u1eadt H\u00fac<\/p><\/blockquote>\n\n\n\n<p>L\u1ef1c k\u1ebf l\u00e0 g\u00ec?<\/p>\n\n\n\n<p>L\u1ef1c k\u1ebf ch\u00ednh l\u00e0 d\u1ee5ng c\u1ee5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o \u0111\u1ed9 l\u1edbn, c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a l\u1ef1c. Tr\u00ean th\u1ef1c t\u1ebf c\u00f3 r\u1ea5t nhi\u1ec1u lo\u1ea1i l\u1ef1c k\u1ebf kh\u00e1c nhau. Nh\u01b0ng c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c ti\u1ebfp c\u1eadn v\u1edbi chi\u1ebfc l\u1ef1c k\u1ebf \u0111\u01a1n gi\u1ea3n nh\u1ea5t trong c\u00e1c ti\u1ebft h\u1ecdc th\u1ef1c h\u00e0nh tr\u00ean l\u1edbp. L\u1ef1c k\u1ebf n\u00e0y ch\u00ednh l\u00e0 chi\u1ebfc l\u1ef1c k\u1ebf l\u00f2 xo. Ngo\u00e0i ra, c\u00e1c em c\u00f3 th\u1ec3 tham kh\u1ea3o th\u00eam v\u1ec1 l\u1ef1c k\u1ebf \u0111i\u1ec7n t\u1eed, l\u1ef1c k\u1ebf \u0111\u1ec3 \u0111o l\u1ef1c k\u00e9o, \u0111\u1ea9y,\u2026<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u0110\u1ecdc th\u00eam v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng ri\u00eang<\/p><\/blockquote>\n\n\n\n<p>L\u1ef1c k\u1ebf c\u00f3 nhi\u1ec1u gi\u1edbi h\u1ea1n \u0111o kh\u00e1c nhau<\/p>\n\n\n\n<p>C\u1ea5u t\u1ea1o c\u1ee7a m\u1ed9t chi\u1ebfc l\u1ef1c k\u1ebf l\u00f2 xo \u0111\u01a1n gi\u1ea3n bao g\u1ed3m c\u00e1c b\u1ed9 ph\u1eadn:<\/p>\n\n\n\n<p>M\u00f3c treo l\u1ef1c k\u1ebf: D\u00f9ng \u0111\u1ec3 c\u1ed1 \u0111\u1ecbnh l\u1ef1c k\u1ebf tr\u00ean gi\u00e1 treo th\u00ed nghi\u1ec7m. Chi\u1ebfc m\u00f3c treo n\u00e0y s\u1ebd \u0111\u1ea3m b\u1ea3o l\u1ef1c k\u1ebf kh\u00f4ng c\u00f3 th\u00eam c\u00e1c ngo\u1ea1i l\u1ef1c t\u00e1c d\u1ee5ng. L\u1ef1c k\u1ebf \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111o tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt c\u1ea7n ph\u1ea3i c\u00e2n b\u1eb1ng, kh\u00f4ng b\u1ecb l\u1ed7i.<\/p>\n\n\n\n<p>L\u00f2 xo: N\u1eb1m b\u00ean trong v\u1ecf l\u1ef1c k\u1ebf \u0111\u1ec3 \u0111o tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt.<\/p>\n\n\n\n<p>Kim ch\u1ec9 th\u1ecb: Kim ch\u1ec9 th\u1ecb d\u00f9ng \u0111\u1ec3 ch\u1ec9 \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c. Khi ch\u00fang ta treo v\u1eadt v\u00e0o l\u1ef1c k\u1ebf. Ti\u1ebfn h\u00e0nh \u0111o, kim ch\u1ec9 th\u1ecb s\u1ebd chuy\u1ec3n \u0111\u1ed9ng \u0111\u1ebfn \u0111\u00fang tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt. Khi kim ch\u1ec9 th\u1ecb ng\u1eebng chuy\u1ec3n \u0111\u1ed9ng c\u00f3 ngh\u0129a l\u00e0 \u0111\u00e3 \u0111o xong tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt.<\/p>\n\n\n\n<p>V\u1ecf l\u1ef1c k\u1ebf: V\u1ecf l\u1ef1c k\u1ebf \u0111\u1ea3m b\u1ea3o cho kim ch\u1ec9 th\u1ecb. Ph\u1ea7n l\u00f2 xo b\u00ean trong kh\u00f4ng b\u1ecb t\u00e1c \u0111\u1ed9ng trong qu\u00e1 tr\u00ecnh \u0111o. Ngo\u00e0i ra, tr\u00ean v\u1ecf l\u1ef1c k\u1ebf c\u00f2n c\u00f3 c\u00e1c v\u1ea1ch chia \u0111\u1ed9 hi\u1ec3n th\u1ecb \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c.<\/p>\n\n\n\n<p>M\u00f3c treo v\u1eadt: \u0110\u00e2y l\u00e0 ph\u1ea7n ch\u00fang ta s\u1ebd treo v\u1eadt v\u00e0o \u0111\u1ec3 ti\u1ebfn h\u00e0nh \u0111o tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt. Ph\u1ea7n m\u00f3c treo n\u00e0y s\u1ebd gi\u00fap c\u1ed1 \u0111\u1ecbnh v\u1eadt v\u00e0o l\u1ef1c k\u1ebf m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng h\u01a1n<\/p>\n\n\n\n<p>C\u1ea5u t\u1ea1o c\u1ee7a l\u1ef1c k\u1ebf \u0111em l\u1ea1i t\u00e1c d\u1ee5ng t\u1ed1t<\/p>\n\n\n\n<p>L\u1ef1c k\u1ebf ph\u00e9p \u0111o tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng ch\u00ednh x\u00e1c l\u00e0 d\u1ee5ng c\u1ee5 d\u00f9ng \u0111\u1ec3 \u0111o \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c. \u0110\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a tr\u1ecdng l\u1ef1c. Ng\u01b0\u1eddi ta s\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 n\u00e0y \u0111\u1ec3 ti\u1ebfn h\u00e0nh \u0111o c\u00e1c th\u00ed nghi\u1ec7m. Trong c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m, chi\u1ebfc l\u1ef1c k\u1ebf c\u00f3 th\u1ec3 c\u00f3 c\u1ea5u t\u1ea1o ph\u1ee9c t\u1ea1p h\u01a1n l\u1ef1c k\u1ebf th\u01b0\u1eddng. \u0110\u1ec3 t\u0103ng \u0111\u1ed9 ch\u00ednh x\u00e1c, c\u00f3 nhi\u1ec1u chi\u1ebfc l\u1ef1c k\u1ebf \u0111\u01b0\u1ee3c <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">thi\u1ebft k\u1ebf<\/a> ri\u00eang bi\u1ec7t \u0111\u1ec3 s\u1eed d\u1ee5ng. L\u1ef1c k\u1ebf \u0111i\u1ec7n t\u1eed c\u0169ng \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0 chi\u1ebfc l\u1ef1c k\u1ebf th\u00f4ng d\u1ee5ng trong cu\u1ed9c s\u1ed1ng ng\u00e0y nay. \u0110o l\u1ef1c t\u00e1c \u0111\u1ed9ng trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p v\u00f4 c\u00f9ng quan tr\u1ecdng.<\/p>\n\n\n\n<p>S\u1eed d\u1ee5ng l\u1ef1c k\u1ebf trong \u0111\u1eddi s\u1ed1ng h\u1eb1ng ng\u00e0y<\/p>\n\n\n\n<p>Trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y, c\u00f3 r\u1ea5t nhi\u1ec1u nh\u1eefng \u1ee9ng d\u1ee5ng li\u00ean quan \u0111\u1ebfn l\u1ef1c. \u0110\u00e2y c\u0169ng ch\u00ednh l\u00e0 n\u01a1i c\u00f3 s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a l\u1ef1c k\u1ebf. Ch\u00fang ta c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u1ef1c k\u1ebf \u0111\u1ec3 \u0111o v\u00e0 t\u00ednh to\u00e1n tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt. Ngo\u00e0i ra l\u1ef1c k\u1ebf c\u00f2n c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 \u0111o l\u1ef1c \u0111\u1ea9y, l\u1ef1c k\u00e9o, ho\u1eb7c hai l\u1ef1c k\u1ebft h\u1ee3p. Tuy nhi\u00ean, L\u1ef1c k\u1ebf ph\u00e9p \u0111o tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u nh\u1ea5t trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y. \u0110\u1ed1i v\u1edbi c\u00e1c em l\u1edbp 6 th\u00ec khi h\u1ecdc th\u1ef1c h\u00e0nh, c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t v\u00e0 s\u1eed d\u1ee5ng l\u1ef1c k\u1ebf \u0111o tr\u1ecdng l\u01b0\u1ee3ng v\u1eadt.<\/p>\n\n\n\n<p>L\u1ef1c k\u1ebf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u trong cu\u1ed9c s\u1ed1ng<\/p>\n\n\n\n<p>L\u1ef1c k\u1ebf v\u00e0 tr\u1ecdng l\u1ef1c<\/p>\n\n\n\n<p>V\u1edbi nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y, c\u00e1c em s\u1ebd hi\u1ec3u h\u01a1n v\u1ec1 v\u1ea1n v\u1eadt trong cu\u1ed9c s\u1ed1ng. N\u1ebfu ch\u00fang ta ch\u01b0a t\u1eebng bi\u1ebft \u0111\u1ebfn Tr\u1ecdng l\u1ef1c, ch\u00fang ta s\u1ebd kh\u00f4ng hi\u1ec3u t\u1ea1i sao m\u1ecdi th\u1ee9 c\u00f3 th\u1ec3 \u0111\u1ee9ng y\u00ean tr\u00ean m\u1eb7t \u0111\u1ea5t. Tr\u00e1i \u0111\u1ea5t th\u00ec kh\u00f4ng ng\u1eebng chuy\u1ec3n \u0111\u1ed9ng. N\u1ebfu kh\u00f4ng c\u00f3 tr\u1ecdng l\u1ef1c, v\u1ea1n v\u1eadt c\u00f3 th\u1ec3 b\u1ecb v\u0103ng ra b\u1ea5t c\u1ee9 l\u00fac n\u00e0o. \u0110\u00e2y ch\u00ednh l\u00e0 \u00fd ngh\u0129a c\u1ee7a m\u00f4n V\u1eadt l\u00fd. V\u1eadt l\u00fd \u0111em \u0111\u1ebfn cho ch\u00fang ta nh\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 khoa h\u1ecdc, v\u1ec1 cu\u1ed9c s\u1ed1ng. Nh\u1eefng hi\u1ec7n t\u01b0\u1ee3ng x\u1ea3y ra trong cu\u1ed9c s\u1ed1ng \u0111\u1ec1u c\u00f3 th\u1ec3 gi\u1ea3i th\u00edch b\u1eb1ng v\u1eadt l\u00fd. Hi\u1ec3u \u0111\u01b0\u1ee3c m\u00f4n h\u1ecdc V\u1eadt l\u00fd, c\u00e1c em s\u1ebd kh\u00e1m ph\u00e1 \u0111\u01b0\u1ee3c nhi\u1ec1u \u0111i\u1ec1u m\u1edbi m\u1ebb h\u01a1n.<\/p>\n\n\n\n<p>C\u00f3 th\u1ec3 n\u00f3i, l\u1ef1c k\u1ebf ph\u00e9p \u0111o tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i \u0111\u1ec1 c\u1eadp \u0111\u1ebfn tr\u00ean \u0111\u00e2y. Nh\u1eefng ki\u1ebfn th\u1ee9c li\u00ean quan \u0111\u1ebfn L\u1ef1c k\u1ebf \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i gi\u1ea3i \u0111\u00e1p v\u00e0 di\u1ec5n gi\u1ea3i. C\u00e1c em c\u00f3 th\u1ec3 tham kh\u1ea3o v\u00e0 ghi nh\u1edb nh\u1eefng v\u00ed d\u1ee5 \u0111i k\u00e8m \u0111\u1ec3 hi\u1ec3u h\u01a1n v\u1ec1 b\u00e0i h\u1ecdc n\u00e0y. Ngo\u00e0i ra, nh\u1eefng c\u00f4ng th\u1ee9c li\u00ean quan \u0111\u1ebfn tr\u1ecdng l\u01b0\u1ee3ng s\u1ebd \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng nhi\u1ec1u trong vi\u1ec7c gi\u1ea3i b\u00e0i t\u1eadp. C\u00e1c em n\u00ean ghi ch\u00e9p v\u00e0 s\u1eed d\u1ee5ng th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 c\u00f3 th\u1ec3 l\u00e0m b\u00e0i t\u1ed1t h\u01a1n.<\/p>\n\n\n\n<p>C\u1ea3m \u01a1n c\u00e1c em \u0111\u00e3 \u0111\u00f3n \u0111\u1ecdc b\u00e0i vi\u1ebft n\u00e0y. Nh\u1eefng ki\u1ebfn th\u1ee9c li\u00ean quan \u0111\u1ebfn v\u1eadt l\u00fd 6 \u0111ang \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i \u0111\u0103ng t\u1ea3i tr\u00ean trang ch\u1ee7. C\u00e1c em h\u00e3y \u0111\u1ecdc v\u00e0 tham kh\u1ea3o, t\u00ecm hi\u1ec3u th\u00eam t\u1ea1i \u0111\u00e2y nh\u1eefng ki\u1ebfn th\u1ee9c m\u1edbi nh\u00e9!<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Xem th\u00eam c\u00e1c b\u00e0i vi\u1ebft c\u00f3 c\u00f9ng ch\u1ee7 \u0111\u1ec1<\/p><\/blockquote>\n\n\n\n<p>V\u1eadt l\u00fd 6: T\u00ecm hi\u1ec3u v\u1ec1 k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng c\u1ee7a l\u1ef1c?<\/p>\n\n\n\n<p>Nhi\u1ec7t k\u1ebf l\u00e0 g\u00ec? 3 lo\u1ea1i nhi\u1ec7t k\u1ebf n\u00e0o ph\u1ed5 bi<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Ch\u00fang ta \u0111\u00e3 \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn r\u1ea5t nhi\u1ec1u v\u1ec1 l\u1ef1c. Tuy nhi\u00ean, \u1edf nh\u1eefng b\u00e0i vi\u1ebft tr\u01b0\u1edbc ch\u00fang ta l\u1ea1i ch\u01b0a h\u1ec1 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn d\u1ee5ng c\u1ee5 \u0111\u1ec3 \u0111o \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c. V\u1eady c\u00e1c nh\u00e0 khoa h\u1ecdc, v\u00e0 trong th\u1ef1c t\u1ebf, ng\u01b0\u1eddi ta d\u00f9ng d\u1ee5ng g\u00ec \u0111\u1ec3 \u0111o [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[4,7],"tags":[],"class_list":["post-1145","post","type-post","status-publish","format-standard","hentry","category-trung-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=1145"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1145\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}