Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
B\u1ed9 m\u00f4n v\u1eadt l\u00fd \u0111em \u0111\u1ebfn r\u1ea5t nhi\u1ec1u nh\u1eefng ki\u1ebfn th\u1ee9c m\u1edbi m\u1ebb cho ch\u00fang ta. \u0110\u00f4i khi, ch\u00fang ta kh\u00f4ng th\u1ec3 l\u00fd gi\u1ea3i m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng n\u00e0o \u0111\u00f3 trong cu\u1ed9c s\u1ed1ng. Tuy nhi\u00ean, nh\u1edd c\u00f3 ki\u1ebfn th\u1ee9c m\u00f4n v\u1eadt l\u00fd, ch\u00fang ta l\u1ea1i c\u00f3 th\u1ec3 l\u00fd gi\u1ea3i \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fd do nh\u1eefng b\u00e0i h\u1ecdc trong m\u00f4n v\u1eadt l\u00fd 8 \u0111\u1ec1u \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo tr\u00ecnh t\u1ef1 \u0111\u1ec3 c\u00e1c em t\u00ecm hi\u1ec3u. B\u00e0i vi\u1ebft ng\u00e0y h\u00f4m nay, ch\u00fang t\u00f4i s\u1ebd \u0111em \u0111\u1ebfn cho c\u00e1c em ki\u1ebfn th\u1ee9c v\u1ec1 \u0111\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng. C\u00e1c em h\u00e3y c\u00f9ng \u0111\u1ecdc v\u00e0 kh\u00e1m ph\u00e1 ngay sau \u0111\u00e2y nh\u00e9!<\/p>\n\n\n\n
C\u01a1 n\u0103ng l\u00e0 g\u00ec?<\/p>\n\n\n\n
N\u1ebfu nh\u01b0 \u1edf c\u00e1c b\u00e0i vi\u1ebft tr\u01b0\u1edbc c\u00e1c em \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00ecm hi\u1ec3u v\u1ec1 c\u00f4ng, c\u00f4ng su\u1ea5t. Th\u00ec ng\u00e0y h\u00f4m nay, c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c ti\u1ebfp c\u1eadn v\u1edbi m\u1ed9t ki\u1ebfn th\u1ee9c m\u1edbi ch\u00ednh l\u00e0 c\u01a1 n\u0103ng. C\u01a1 n\u0103ng l\u00e0 m\u1ed9t ki\u1ebfn th\u1ee9c c\u00f3 li\u00ean quan ch\u1ee7 y\u1ebfu \u0111\u1ebfn c\u00f4ng. Hay n\u00f3i c\u00e1ch kh\u00e1c, c\u00f4ng c\u01a1 h\u1ecdc ch\u00ednh l\u00e0 ngu\u1ed3n g\u1ed1c c\u1ee7a c\u01a1 n\u0103ng. Theo nh\u01b0 \u0111\u1ecbnh ngh\u0129a trong b\u1ed9 m\u00f4n v\u1eadt l\u00fd. C\u01a1 n\u0103ng ch\u00ednh l\u00e0 kh\u1ea3 n\u0103ng sinh c\u00f4ng c\u1ee7a m\u1ed9t v\u1eadt. Ch\u00fang ta c\u1ea7n ph\u1ea3i c\u00f3 ki\u1ebfn th\u1ee9c v\u1ec1 c\u00f4ng c\u01a1 h\u1ecdc m\u1edbi c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u ch\u1ee7 \u0111\u1ec1 n\u00e0y.<\/p>\n\n\n\n
Nh\u1eafc l\u1ea1i v\u1ec1 c\u00f4ng c\u01a1 h\u1ecdc. C\u00f4ng c\u01a1 h\u1ecdc \u0111\u01b0\u1ee3c sinh ra khi c\u00f3 m\u1ed9t l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t v\u1eadt khi\u1ebfn cho v\u1eadt \u0111\u00f3 di chuy\u1ec3n. L\u1ef1c ch\u1ec9 sinh c\u00f4ng khi l\u1ef1c \u0111\u00f3 t\u00e1c d\u1ee5ng l\u00ean v\u1eadt v\u00e0 t\u1ea1o ra k\u1ebft qu\u1ea3 di chuy\u1ec3n v\u1eadt. \u0110\u1ed1i v\u1edbi c\u00e1c l\u1ef1c kh\u00e1c, c\u00f9ng t\u00e1c d\u1ee5ng l\u00ean v\u1eadt nh\u01b0ng kh\u00f4ng l\u00e0m v\u1eadt di chuy\u1ec3n. Th\u00ec ta n\u00f3i c\u00e1c l\u1ef1c \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ef1c sinh c\u00f4ng c\u01a1 h\u1ecdc. C\u01a1 n\u0103ng s\u1ebd \u0111\u01b0\u1ee3c x\u00e9t tr\u00ean l\u1ef1c sinh c\u00f4ng. C\u01a1 n\u0103ng ch\u00ednh l\u00e0 kh\u1ea3 n\u0103ng sinh c\u00f4ng c\u1ee7a m\u1ed9t v\u1eadt khi v\u1eadt \u0111\u00f3 b\u1ecb t\u00e1c d\u1ee5ng l\u1ef1c. \u0110\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng c\u0169ng \u0111\u01b0\u1ee3c x\u00e9t tr\u00ean ph\u01b0\u01a1ng di\u1ec7n n\u00e0y.<\/p>\n\n\n\n
V\u00ed d\u1ee5 v\u1ec1 c\u01a1 n\u0103ng<\/p>\n\n\n\n
\u0110\u01a1n v\u1ecb c\u1ee7a c\u01a1 n\u0103ng<\/p>\n\n\n\n
C\u00e1c em c\u1ea7n t\u00ecm hi\u1ec3u t\u1eeb ngu\u1ed3n g\u1ed1c tr\u01b0\u1edbc khi \u0111\u1ebfn v\u1edbi \u0111\u1ecbnh lu\u1eadt \u0111\u00f3. Khi v\u1eadt c\u00f3 kh\u1ea3 n\u0103ng sinh c\u00f4ng c\u00e0ng l\u1edbn th\u00ec c\u01a1 n\u0103ng c\u1ee7a v\u1eadt c\u00e0ng cao. \u0110\u01a1n v\u1ecb c\u1ee7a c\u01a1 n\u0103ng trong b\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o qu\u1ed1c t\u1ebf l\u00e0 Jun. K\u00ed hi\u1ec7u \u0111\u01a1n gi\u1ea3n l\u00e0 J. \u0110\u00e2y c\u0169ng ch\u00ednh l\u00e0 \u0111\u01a1n v\u1ecb \u0111\u01b0\u1ee3c d\u00f9ng nhi\u1ec1u nh\u1ea5t khi nh\u1eafc \u0111\u1ebfn c\u01a1 n\u0103ng. C\u00e1c em l\u00e0m b\u00e0i t\u1eadp n\u00ean ch\u00fa \u00fd \u0111\u1ebfn \u0111\u01a1n v\u1ecb n\u00e0y. C\u01a1 n\u0103ng c\u00f2n \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0 bao g\u1ed3m hai d\u1ea1ng th\u1ebf n\u0103ng v\u00e0 \u0111\u1ed9ng n\u0103ng.<\/p>\n\n\n\n
\u0110\u1ed9ng n\u0103ng l\u00e0 g\u00ec?<\/p>\n\n\n\n
Trong ch\u01b0\u01a1ng tr\u00ecnh v\u1eadt l\u00fd 8 c\u00f3 th\u1ec3 c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c t\u00ecm hi\u1ec3u v\u1ec1 \u0111\u1ed9ng n\u0103ng nhi\u1ec1u h\u01a1n th\u1ebf n\u0103ng. \u0110\u1ed9ng n\u0103ng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 ch\u1ec9 c\u01a1 n\u0103ng c\u1ee7a m\u1ed9t v\u1eadt sinh ra khi v\u1eadt chuy\u1ec3n \u0111\u1ed9ng. Hay n\u00f3i c\u00e1ch kh\u00e1c, v\u1eadt chuy\u1ec3n \u0111\u1ed9ng sinh ra c\u01a1 n\u0103ng. Th\u00ec ta g\u1ecdi \u0111\u00e2y ch\u00ednh l\u00e0 \u0111\u1ed9ng n\u0103ng. Y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng nhi\u1ec1u nh\u1ea5t \u0111\u1ebfn \u0111\u1ed9ng n\u0103ng ch\u00ednh l\u00e0 s\u1ef1 di chuy\u1ec3n c\u1ee7a v\u1eadt. N\u1ebfu v\u1eadt b\u1ecb t\u00e1c d\u1ee5ng l\u1ef1c m\u00e0 kh\u00f4ng di chuy\u1ec3n th\u00ec v\u1eadt n\u00e0y kh\u00f4ng sinh ra \u0111\u1ed9ng n\u0103ng.<\/p>\n\n\n\n
V\u1eadt chuy\u1ec3n \u0111\u1ed9ng c\u00e0ng nhanh, kh\u1ed1i l\u01b0\u1ee3ng c\u00e0ng l\u1edbn th\u00ec \u0111\u1ed9ng n\u0103ng c\u00e0ng cao. \u0110\u00e2y c\u0169ng ch\u00ednh l\u00e0 hai y\u1ebfu t\u1ed1 ch\u00ednh quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 l\u1edbn c\u1ee7a \u0111\u1ed9ng n\u0103ng. Ch\u00fang ta c\u00f3 th\u1ec3 b\u1eaft g\u1eb7p \u0111\u1ed9ng n\u0103ng trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p th\u1ef1c t\u1ebf. V\u00ed d\u1ee5 h\u00f2n bi \u0111ang l\u0103n tr\u00ean \u0111\u1ea5t sau khi con ng\u01b0\u1eddi t\u00e1c d\u1ee5ng l\u1ef1c. Th\u00ec h\u00f2n bi n\u00e0y \u0111ang sinh ra \u0111\u1ed9ng n\u0103ng khi di chuy\u1ec3n. \u0110\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng c\u0169ng c\u00f3 li\u00ean quan \u0111\u1ebfn \u0111\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt.<\/p>\n\n\n\n
Th\u1ebf n\u0103ng l\u00e0 g\u00ec?<\/p>\n\n\n\n
Kh\u00f4ng \u0111\u01a1n gi\u1ea3n nh\u01b0 \u0111\u1ed9ng n\u0103ng. Th\u1ebf n\u0103ng \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 v\u1eadt l\u00fd h\u1ecdc chia th\u00e0nh hai d\u1ea1ng. Th\u1ebf n\u0103ng tr\u1ecdng tr\u01b0\u1eddng v\u00e0 th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i. C\u00e1c em n\u00ean t\u00ecm hi\u1ec3u c\u1ea3 hai d\u1ea1ng n\u00e0y \u0111\u1ec3 khi l\u00e0m b\u00e0i t\u1eadp kh\u00f4ng b\u1ecb nh\u1ea7m l\u1eabn.<\/p>\n\n\n\n
Th\u1ebf n\u0103ng l\u00e0 g\u00ec?<\/p>\n\n\n\n
Th\u1ebf n\u0103ng tr\u1ecdng tr\u01b0\u1eddng<\/p>\n\n\n\n
Th\u1ebf n\u0103ng tr\u1ecdng tr\u01b0\u1eddng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi \u0111\u1ed9 cao c\u1ee7a v\u1eadt so v\u1edbi m\u1eb7t \u0111\u1ea5t. \u0110\u00f4i khi ch\u00fang ta c\u0169ng c\u00f3 th\u1ec3 l\u1ea5y m\u1ed9t v\u1ecb tr\u00ed kh\u00e1c kh\u00f4ng ph\u1ea3i m\u1eb7t \u0111\u1ea5t \u0111\u1ec3 t\u00ednh \u0111\u1ed9 cao. V\u1eadt \u0111\u01b0\u1ee3c \u0111\u1eb7t c\u00e0ng cao so v\u1edbi m\u1ed1c th\u00ec th\u1ebf n\u0103ng tr\u1ecdng tr\u01b0\u1eddng sinh ra c\u00e0ng l\u1edbn.<\/p>\n\n\n\n
Trong tr\u01b0\u1eddng h\u1ee3p v\u1eadt \u0111\u1eb7t tr\u00ean m\u1eb7t \u0111\u1ea5t ho\u1eb7c t\u1ea1i v\u1ecb tr\u00ed m\u1ed1c. Th\u00ec th\u1ebf n\u0103ng tr\u1ecdng tr\u01b0\u1eddng trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y b\u1eb1ng 0. Hay ta n\u00f3i, th\u1ebf n\u0103ng tr\u1ecdng tr\u01b0\u1eddng kh\u00f4ng sinh ra t\u1ea1i v\u1ecb tr\u00ed n\u00e0y. \u0110\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng li\u00ean quan \u0111\u1ebfn \u0111\u1ed9 l\u1edbn c\u1ee7a \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng. N\u00ean ch\u00fang ta c\u1ea7n ph\u1ea3i ghi nh\u1edb.<\/p>\n\n\n\n
Th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i<\/p>\n\n\n\n
Th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 ch\u1ec9 vi\u1ec7c c\u01a1 n\u0103ng c\u1ee7a m\u1ed9t v\u1eadt b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi \u0111\u1ed9 bi\u1ebfn d\u1ea1ng c\u1ee7a v\u1eadt. Th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n \u1edf l\u00f2 xo, ho\u1eb7c nh\u1eefng v\u1eadt c\u00f3 t\u00ednh \u0111\u00e0n h\u1ed3i. V\u1edbi d\u1ea1ng th\u1ebf n\u0103ng n\u00e0y, c\u00e1c em s\u1ebd \u00edt \u0111\u01b0\u1ee3c t\u00ecm hi\u1ec3u h\u01a1n trong ch\u01b0\u01a1ng tr\u00ecnh v\u1eadt l\u00fd 8. Th\u1ebf nh\u01b0ng ch\u00fang t\u00f4i v\u1eabn \u0111\u1ec1 c\u1eadp \u0111\u1ec3 \u0111em \u0111\u1ebfn c\u00e1i nh\u00ecn t\u1ed5ng qu\u00e1t nh\u1ea5t cho c\u00e1c em v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y.<\/p>\n\n\n\n
M\u1ed9t v\u1eadt ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 sinh ra th\u1ebf n\u0103ng v\u00e0 c\u01a1 n\u0103ng c\u00f9ng l\u00fac. Ho\u1eb7c \u0111\u00f4i khi v\u1eadt ch\u1ec9 sinh ra m\u1ed9t trong hai lo\u1ea1i n\u00e0y. Tuy nhi\u00ean c\u00e1ch g\u1ecdi chung \u0111\u1ec1u l\u00e0 c\u01a1 n\u0103ng. V\u1eadt sinh ra c\u01a1 n\u0103ng khi ch\u1ecbu t\u00e1c d\u1ee5ng l\u1ef1c v\u00e0 di chuy\u1ec3n. M\u1ed9t v\u00ed d\u1ee5 \u0111\u01a1n gi\u1ea3n v\u1ec1 v\u1eadt c\u00f3 c\u1ea3 th\u1ebf n\u0103ng v\u00e0 \u0111\u1ed9ng n\u0103ng ch\u00ednh l\u00e0 chi\u1ebfc l\u00e1 r\u01a1i. Chi\u1ebfc l\u00e1 l\u00fac n\u00e0y sinh ra c\u1ea3 hai lo\u1ea1i c\u1ee7a c\u01a1 n\u0103ng. Ngo\u00e0i ra c\u00f2n nhi\u1ec1u v\u00ed d\u1ee5 kh\u00e1c c\u00e1c em c\u00f3 th\u1ec3 t\u1ef1 t\u00ecm hi\u1ec3u.<\/p>\n\n\n\n
\u0110\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng l\u00e0 g\u00ec?<\/p>\n\n\n\n
Khi m\u1ed9t v\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng trong tr\u1ecdng tr\u01b0\u1eddng, th\u00ec c\u01a1 n\u0103ng c\u1ee7a v\u1eadt b\u1eb1ng t\u1ed5ng \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fd thuy\u1ebft c\u00e1c em c\u1ea7n bi\u1ebft v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y. Ch\u00fang ta c\u00f3 c\u00f4ng th\u1ee9c:<\/p>\n\n\n\n
W = W\u0111 + Wt = \u00bd mv2 + mgz<\/p>\n\n\n\n
Trong \u0111\u00f3 W l\u00e0 c\u01a1 n\u0103ng, \u0111\u1ed9 l\u1edbn c\u1ee7a c\u01a1 n\u0103ng. W\u0111 l\u00e0 \u0111\u1ed9ng n\u0103ng, \u0111\u1ed9 l\u1edbn c\u1ee7a \u0111\u1ed9ng n\u0103ng. Wt l\u00e0 th\u1ebf n\u0103ng, \u0111\u1ed9 l\u1edbn c\u1ee7a th\u1ebf n\u0103ng. C\u00e1c em c\u1ea7n ghi nh\u1edb c\u00f4ng th\u1ee9c n\u00e0y \u0111\u1ec3 l\u00e0m b\u00e0i t\u1eadp t\u00ednh to\u00e1n tr\u00ean l\u1edbp.<\/p>\n\n\n\n
\u0110\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng l\u00e0 g\u00ec?<\/p>\n\n\n\n
\u0110\u1ecbnh ngh\u0129a<\/p>\n\n\n\n
\u0110\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng l\u00e0 \u0111\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n ch\u1ec9 s\u1ed1 c\u01a1 n\u0103ng c\u1ee7a m\u1ed9t v\u1eadt khi v\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng trong tr\u1ecdng tr\u01b0\u1eddng. Ngo\u00e0i ra, \u0111\u1ecbnh lu\u1eadt n\u00e0y c\u0169ng ch\u1ec9 \u00e1p d\u1ee5ng khi v\u1eadt ch\u1ec9 ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a l\u1ef1c \u0111\u00e0n h\u1ed3i ho\u1eb7c tr\u1ecdng l\u1ef1c. B\u1ea5t c\u1ee9 m\u1ed9t l\u1ef1c n\u00e0o kh\u00e1c ngo\u00e0i hai l\u1ef1c n\u00e0y t\u00e1c \u0111\u1ed9ng l\u00ean v\u1eadt th\u00ec \u0111\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng kh\u00f4ng c\u00f2n \u00fd ngh\u0129a. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed9ng, \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng c\u1ee7a v\u1eadt c\u00f3 th\u1ec3 bi\u1ebfn \u0111\u1ed5i qua l\u1ea1i. \u0110i\u1ec1u n\u00e0y kh\u00f4ng b\u1ecb thay \u0111\u1ed5i khi v\u1eadt ch\u1ec9 ch\u1ecbu t\u00e1c d\u1ee5ng c\u1ee7a tr\u1ecdng l\u1ef1c v\u00e0 l\u1ef1c \u0111\u00e0n h\u1ed3i.<\/p>\n\n\n\n
\u0110\u1ecbnh ngh\u0129a c\u1ee7a \u0111\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng<\/p>\n\n\n\n
\u0110\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng: Trong khi chuy\u1ec3n \u0111\u1ed9ng, n\u1ebfu v\u1eadt ch\u1ec9 ch\u1ecbu t\u00e1c d\u1ee5ng c\u1ee7a c\u1ee7a tr\u1ecdng l\u1ef1c, \u0111\u1ed9ng n\u0103ng c\u00f3 th\u1ec3 chuy\u1ec3n th\u00e0nh th\u1ebf n\u0103ng v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, v\u00e0 t\u1ed5ng c\u1ee7a ch\u00fang, t\u1ee9c l\u00e0 c\u01a1 n\u0103ng c\u1ee7a v\u1eadt, \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n (kh\u00f4ng \u0111\u1ed5i theo th\u1eddi gian).<\/p>\n\n\n\n
\u0110\u00e2y ch\u00ednh l\u00e0 l\u00fd thuy\u1ebft ch\u00ednh x\u00e1c v\u1ec1 \u0111\u1ecbnh lu\u1eadt n\u00e0y. C\u00e1c em c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn nh\u1eefng \u0111i\u1ec1u tr\u00ean \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u00fang khi n\u00e0o d\u00f9ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh lu\u1eadt.<\/p>\n\n\n\n
B\u00e0i t\u1eadp \u0111\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng<\/p>\n\n\n\n
V\u1edbi c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp thu\u1ed9c ch\u1ee7 \u0111\u1ec1 n\u00e0y, c\u00e1c em ph\u1ea3i ghi nh\u1edb \u0111\u1ecbnh ngh\u0129a c\u1ee7a \u0111\u1ecbnh lu\u1eadt. D\u1ea1ng b\u00e0i tr\u1eafc nghi\u1ec7m th\u01b0\u1eddng s\u1ebd xoay quanh \u0111\u1ecbnh ngh\u0129a n\u00e0y. H\u00e3y ch\u1ecdn \u0111\u00e1p \u00e1n c\u00f3 \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t. \u0110\u00f4i khi \u0111\u00e1p \u00e1n \u0111\u01b0\u1ee3c \u0111\u01b0a ra c\u00f3 th\u1ec3 \u0111\u00fang nh\u01b0ng ch\u01b0a \u0111\u1ee7. C\u00e1c em c\u1ea7n ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t. \u0110\u1ed1i v\u1edbi d\u1ea1ng b\u00e0i t\u00ednh to\u00e1n, c\u00e1c em c\u1ea7n ki\u1ec3m tra c\u00e1c \u0111i\u1ec1u ki\u1ec7n ch\u00ednh x\u00e1c khi \u00e1p d\u1ee5ng \u0111\u1ecbnh lu\u1eadt. T\u00ednh to\u00e1n, chuy\u1ec3n \u0111\u1ed5i \u0111\u01a1n v\u1ecb v\u1ec1 \u0111\u01a1n v\u1ecb gi\u1ed1ng nh\u01b0 c\u00f4ng th\u1ee9c. \u0110\u00e2y ch\u00ednh l\u00e0 nh\u1eefng l\u01b0u \u00fd khi l\u00e0m b\u00e0i d\u00e0nh cho c\u00e1c em. C\u00e1c em c\u00f3 th\u1ec3 ghi ch\u00e9p l\u1ea1i, ho\u1eb7c h\u1ecdc thu\u1ed9c \u0111\u1ec3 c\u00f3 th\u1ec3 v\u1eadn d\u1ee5ng. Nh\u1eefng v\u00ed d\u1ee5 ch\u00fang t\u00f4i \u0111\u01b0a ra tr\u00ean \u0111\u00e2y \u0111\u1ec1u r\u1ea5t d\u1ec5 nh\u1edb. C\u00e1c em h\u00e3y ch\u00fa \u00fd nh\u00e9!<\/p>\n\n\n\n
\u1ee8ng d\u1ee5ng c\u1ee7a c\u01a1 n\u0103ng<\/p>\n\n\n\n
C\u00f3 th\u1ec3 n\u00f3i, t\u1ea5t c\u1ea3 nh\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 ch\u1ee7 \u0111\u1ec1 \u0111\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n c\u01a1 n\u0103ng \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i \u0111\u1ec1 c\u1eadp tr\u00ean \u0111\u00e2y. Hy v\u1ecdng nh\u1eefng \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111em \u0111\u1ebfn cho c\u00e1c em c\u00e1ch l\u00e0m b\u00e0i t\u1ed1t nh\u1ea5t. Ngo\u00e0i ra, c\u00e1c em c\u0169ng n\u00ean t\u00ecm hi\u1ec3u v\u1ec1 v\u00ed d\u1ee5 b\u00e0i t\u1eadp \u0111\u1ec3 th\u1ef1c hi\u1ec7n. Nh\u01b0 v\u1eady, c\u00e1c em s\u1ebd \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh lu\u1eadt ch\u00ednh x\u00e1c h\u01a1n v\u00e0 l\u00e0m b\u00e0i chu\u1ea9n h\u01a1n.<\/p>\n\n\n\n
Tr\u00ean trang ch\u1ee7 c\u1ee7a ch\u00fang t\u00f4i \u0111ang \u0111\u01b0\u1ee3c \u0111\u0103ng t\u1ea3i nh\u1eefng b\u00e0i vi\u1ebft v\u1ec1 ch\u1ee7 \u0111\u1ec1 v\u1eadt l\u00fd 8. C\u00e1c em c\u00f3 th\u1ec3 tham kh\u1ea3o th\u00eam nh\u1eefng ch\u1ee7<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn B\u1ed9 m\u00f4n v\u1eadt l\u00fd \u0111em \u0111\u1ebfn r\u1ea5t nhi\u1ec1u nh\u1eefng ki\u1ebfn th\u1ee9c m\u1edbi m\u1ebb cho ch\u00fang ta. \u0110\u00f4i khi, ch\u00fang ta kh\u00f4ng th\u1ec3 l\u00fd gi\u1ea3i m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng n\u00e0o \u0111\u00f3 trong cu\u1ed9c s\u1ed1ng. Tuy nhi\u00ean, nh\u1edd c\u00f3 ki\u1ebfn th\u1ee9c m\u00f4n v\u1eadt l\u00fd, ch\u00fang ta l\u1ea1i c\u00f3 th\u1ec3 l\u00fd gi\u1ea3i \u0111\u01b0\u1ee3c […]<\/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-1227","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\/1227","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=1227"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1227\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1227"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1227"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1227"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}