Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
Ch\u00fang ta \u0111\u00e3 bi\u1ebft \u0111\u1ebfn s\u1ef1 t\u00e1c d\u1ee5ng c\u1ee7a l\u1ef1c trong b\u00e0i vi\u1ebft tr\u01b0\u1edbc. Khi c\u00f3 l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t v\u1eadt, s\u1ebd c\u00f3 nh\u1eefng k\u1ebft qu\u1ea3 x\u1ea3y ra. Ch\u00fang ta ph\u1ea3i d\u1ef1a v\u00e0o k\u1ebft qu\u1ea3 c\u1ee7a l\u1ef1c \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a l\u1ef1c. V\u1eady c\u00e1c em \u0111\u00e3 bi\u1ebft \u0111\u1ebfn nh\u1eefng k\u1ebft qu\u1ea3 c\u1ee7a vi\u1ec7c t\u00e1c d\u1ee5ng l\u1ef1c l\u00ean v\u1eadt hay ch\u01b0a? Nh\u1eefng v\u00ed d\u1ee5 th\u1ef1c t\u1ebf v\u1ec1 k\u1ebft qu\u1ea3 n\u00e0y di\u1ec5n ra nh\u01b0 th\u1ebf n\u00e0o? B\u00e0i vi\u1ebft ng\u00e0y h\u00f4m nay, ch\u00fang ta s\u1ebd c\u00f9ng nhau t\u00ecm hi\u1ec3u v\u1ec1 k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng c\u1ee7a l\u1ef1c nh\u00e9!<\/p>\n\n\n\n
T\u00e1c d\u1ee5ng l\u1ef1c<\/p>\n\n\n\n
Tr\u01b0\u1edbc khi \u0111\u1ebfn v\u1edbi k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng l\u1ef1c l\u00ean v\u1eadt, ch\u00fang ta s\u1ebd \u00f4n l\u1ea1i nh\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 l\u1ef1c t\u00e1c \u0111\u1ed9ng. L\u1ef1c \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a v\u00f4 c\u00f9ng \u0111\u01a1n gi\u1ea3n. Khi c\u00f3 m\u1ed9t v\u1eadt n\u00e0y t\u00e1c \u0111\u1ed9ng k\u00e9o ho\u1eb7c \u0111\u1ea9y l\u00ean m\u1ed9t v\u1eadt kh\u00e1c, ch\u00fang ta g\u1ecdi \u0111\u00e2y l\u00e0 t\u00e1c d\u1ee5ng l\u1ef1c. Ch\u00fang ta c\u00f3 th\u1ec3 h\u00ecnh dung l\u1ef1c xu\u1ea5t hi\u1ec7n khi c\u00f3 h\u00e0nh \u0111\u1ed9ng k\u00e9o ho\u1eb7c \u0111\u1ea9y. Trong th\u1ef1c t\u1ebf, ch\u00fang ta b\u1eaft g\u1eb7p r\u1ea5t nhi\u1ec1u h\u00e0nh \u0111\u1ed9ng t\u00e1c d\u1ee5ng l\u1ef1c. Khi m\u1ed9t ng\u01b0\u1eddi k\u00e9o chi\u1ebfc th\u00f9ng, th\u00ec ng\u01b0\u1eddi \u0111\u00e3 t\u00e1c d\u1ee5ng l\u1ef1c k\u00e9o l\u00ean chi\u1ebfc th\u00f9ng. T\u00ecm hi\u1ec3u v\u1ec1 k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng l\u1ef1c ch\u00fang ta s\u1ebd d\u1ec5 d\u00e0ng x\u00e1c \u0111\u1ecbnh l\u1ef1c.<\/p>\n\n\n\n
T\u00ecm hi\u1ec3u v\u1ec1 l\u1ef1c c\u00e2n b\u1eb1ng<\/p><\/blockquote>\n\n\n\n
Tay ta t\u00e1c d\u1ee5ng l\u1ef1c \u1ea5n l\u00ean qu\u1ea3 b\u00f3ng<\/p>\n\n\n\n
Ph\u00e2n t\u00edch l\u1ef1c khi t\u00ednh to\u00e1n<\/p>\n\n\n\n
M\u1ed9t v\u1eadt c\u00f3 th\u1ec3 ch\u1ecbu t\u00e1c d\u1ee5ng c\u1ee7a nhi\u1ec1u l\u1ef1c kh\u00e1c nhau. V\u00e0 l\u1ef1c cu\u1ed1i c\u00f9ng t\u00e1c d\u1ee5ng l\u00ean v\u1eadt ch\u00ednh l\u00e0 t\u1ed5 h\u1ee3p l\u1ef1c. T\u1ea5t c\u1ea3 m\u1ecdi v\u1eadt trong \u0111\u1eddi s\u1ed1ng \u0111\u1ec1u ch\u1ecbu \u00edt nh\u1ea5t 1 l\u1ef1c t\u00e1c d\u1ee5ng. \u0110\u00f3 ch\u00ednh l\u00e0 tr\u1ecdng l\u1ef1c hay c\u00f2n g\u1ecdi l\u00e0 l\u1ef1c h\u00fat c\u1ee7a tr\u00e1i \u0111\u1ea5t. L\u1ef1c h\u00fat n\u00e0y \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c P=10xm. Trong \u0111\u00f3 P ch\u00ednh l\u00e0 k\u00fd hi\u1ec7u c\u1ee7a tr\u1ecdng l\u1ef1c, c\u00f2n m ch\u00ednh l\u00e0 k\u00ed hi\u1ec7u c\u1ee7a kh\u1ed1i l\u01b0\u1ee3ng v\u1eadt. N\u1ebfu kh\u00f4ng c\u00f3 tr\u1ecdng l\u1ef1c, m\u1ecdi v\u1eadt tr\u00ean tr\u00e1i \u0111\u1ea5t s\u1ebd kh\u00f4ng th\u1ec3 \u0111\u1ee9ng tr\u00ean m\u1eb7t \u0111\u1ea5t. \u0110\u00e2y ch\u00ednh l\u00e0 \u0111\u1ecbnh l\u00fd \u0111\u01b0\u1ee3c kh\u00e1m ph\u00e1 b\u1edfi nh\u00e0 b\u00e1c h\u1ecdc Newton.<\/p>\n\n\n\n
Ch\u1eafc h\u1eb3n trong ch\u01b0\u01a1ng tr\u00ecnh v\u1eadt l\u00fd l\u1edbp 6 hi\u1ec7n nay, c\u00e1c em \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1eafng nghe v\u1ec1 \u0111\u1ecbnh l\u00fd n\u00e0y. Tuy nhi\u00ean, m\u1ecdi v\u1eadt \u0111\u1ec1u kh\u00f4ng ch\u1ec9 ch\u1ecbu m\u1ed9t l\u1ef1c duy nh\u1ea5t \u0111\u00f3 t\u00e1c d\u1ee5ng. L\u1ea5y m\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh l\u00e0 b\u1ea3n th\u00e2n ch\u00fang ta. Ch\u00fang ta \u0111\u1ee9ng \u0111\u01b0\u1ee3c tr\u00ean m\u1eb7t \u0111\u1ea5t c\u0169ng l\u00e0 do c\u00f3 2 l\u1ef1c c\u00e2n b\u1eb1ng \u0111ang t\u00e1c \u0111\u1ed9ng. L\u1ef1c th\u1ee9 nh\u1ea5t ch\u00ednh l\u00e0 tr\u1ecdng l\u1ef1c, v\u00e0 l\u1ef1c th\u1ee9 2 ch\u00ednh l\u00e0 l\u1ef1c n\u00e2ng c\u1ee7a m\u1eb7t \u0111\u1ea5t. T\u00ecm hi\u1ec3u v\u1ec1 k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng l\u1ef1c c\u00e2n b\u1eb1ng, ch\u00fang ta s\u1ebd hi\u1ec3u v\u00ec sao ch\u00fang ta c\u00f3 th\u1ec3 \u0111\u1ee9ng im tr\u00ean m\u1eb7t \u0111\u1ea5t. M\u1ecdi v\u1eadt c\u0169ng v\u1eady, \u0111\u1ec1u ch\u1ecbu hai l\u1ef1c c\u00e2n b\u1eb1ng t\u00e1c d\u1ee5ng.<\/p>\n\n\n\n
T\u00ecm hi\u1ec3u v\u1ec1 k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng l\u1ef1c<\/p>\n\n\n\n
M\u1ed7i l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t v\u1eadt \u0111\u1ec1u c\u00f3 d\u1ea5u hi\u1ec7u r\u00f5 r\u1ec7t. Khi m\u1ed9t v\u1eadt ch\u1ecbu m\u1ed9t l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean n\u00f3 s\u1ebd g\u00e2y ra s\u1ef1 bi\u1ebfn d\u1ea1ng ho\u1eb7c thay \u0111\u1ed5i v\u1ec1 chuy\u1ec3n \u0111\u1ed9ng. \u0110\u00f4i khi, v\u1eadt c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n c\u1ea3 hai k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng n\u00e0y. Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t, hai l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt l\u00e0 hai l\u1ef1c c\u00e2n b\u1eb1ng. Th\u00ec \u0111i\u1ec1u n\u00e0y s\u1ebd kh\u00f4ng x\u1ea3y ra m\u00e0 thay v\u00e0o \u0111\u00f3 l\u00e0 v\u1eadt \u0111\u1ee9ng y\u00ean, ho\u1eb7c chuy\u1ec3n \u0111\u1ed9ng \u0111\u1ec1u theo qu\u1ef9 \u0111\u1ea1o. K\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng l\u1ef1c \u0111\u00f4i khi c\u00f2n gi\u00fap ch\u00fang ta bi\u1ebft \u0111\u01b0\u1ee3c l\u1ef1c \u0111\u00f3 l\u00e0 l\u1ef1c \u0111\u1ea9y, k\u00e9o hay l\u1ef1c n\u00e2ng.<\/p>\n\n\n\n
Con ng\u01b0\u1eddi t\u00e1c d\u1ee5ng l\u1ef1c n\u00e2ng l\u00ean chi\u1ebfc th\u00f9ng<\/p>\n\n\n\n
Nh\u1eefng s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng khi c\u00f3 t\u00e1c d\u1ee5ng l\u1ef1c<\/p>\n\n\n\n
S\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng khi c\u00f3 t\u00e1c d\u1ee5ng l\u1ef1c \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n ra b\u00ean ngo\u00e0i v\u00f4 c\u00f9ng r\u00f5 r\u1ec7t. Ch\u00fang ta ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft b\u1eb1ng m\u1eaft th\u01b0\u1eddng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 4 d\u1ea5u hi\u1ec7u r\u00f5 nh\u1ea5t v\u1ec1 s\u1ef1 bi\u1ebfn \u0111\u1ed5i chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a v\u1eadt khi c\u00f3 t\u00e1c d\u1ee5ng l\u1ef1c. C\u00e1c em h\u00e3y \u0111\u1ecdc v\u00e0 ghi nh\u1edb nh\u00e9!<\/p>\n\n\n\n
V\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng b\u1ecb d\u1eebng l\u1ea1i.<\/p>\n\n\n\n
Khi m\u1ed9t v\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng, \u0111\u1ed9t ng\u1ed9t d\u1eebng l\u1ea1i, ho\u1eb7c t\u1eeb t\u1eeb d\u1eebng l\u1ea1i, th\u00ec \u0111\u00e2y l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a vi\u1ec7c c\u00f3 l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt. Ch\u00fang ta c\u00f3 th\u1ec3 l\u1ea5y v\u00ed d\u1ee5 ngay trong b\u00f3ng \u0111\u00e1. Khi m\u1ed9t qu\u1ea3 b\u00f3ng \u0111\u01b0\u1ee3c \u0111\u00e1 v\u00e0o g\u00f4n, th\u1ee7 m\u00f4n s\u1ebd b\u1eaft qu\u1ea3 b\u00f3ng \u0111\u00f3. Qu\u1ea3 b\u00f3ng \u0111ang chuy\u1ec3n \u0111\u1ed9ng th\u00ec d\u1eebng l\u1ea1i. \u0110\u00e2y ch\u00ednh l\u00e0 v\u00ed d\u1ee5 r\u00f5 nh\u1ea5t cho tr\u01b0\u1eddng h\u1ee3p v\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng th\u00ec b\u1ecb d\u1eebng l\u1ea1i. T\u00ecm hi\u1ec3u v\u1ec1 k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng l\u1ef1c trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, qu\u1ea3 b\u00f3ng ch\u1ecbu m\u1ed9t l\u1ef1c c\u1ea3n t\u1eeb ng\u01b0\u1eddi th\u1ee7 m\u00f4n t\u00e1c \u0111\u1ed9ng. Ch\u00fang ta c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng ph\u00e2n t\u00edch l\u1ef1c h\u01a1n.<\/p>\n\n\n\n
V\u1eadt \u0111ang \u0111\u1ee9ng y\u00ean, b\u1eaft \u0111\u1ea7u chuy\u1ec3n \u0111\u1ed9ng.<\/p>\n\n\n\n
Ch\u1eafc ch\u1eafn d\u1ea5u hi\u1ec7u n\u00e0y ai trong s\u1ed1 ch\u00fang ta c\u0169ng c\u00f3 th\u1ec3 \u0111o\u00e1n ra \u0111\u01b0\u1ee3c. Vi\u1ec7c m\u1ed9t v\u1eadt \u0111ang \u0111\u1ee9ng y\u00ean, d\u1ea7n d\u1ea7n chuy\u1ec3n \u0111\u1ed9ng ho\u1eb7c \u0111\u1ed9t ng\u1ed9t di chuy\u1ec3n. \u0110\u00e2y ch\u00ednh l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a vi\u1ec7c c\u00f3 m\u1ed9t l\u1ef1c t\u00e1c d\u1ee5ng v\u00e0o v\u1eadt. Ch\u00fang ta c\u00f3 th\u1ec3 l\u1ea5y v\u00ed d\u1ee5 v\u1ec1 qu\u1ea3 b\u00f3ng \u0111ang \u0111\u1ee9ng y\u00ean tr\u00ean s\u00e2n. C\u00f3 m\u1ed9t c\u1ea7u th\u1ee7 \u0111\u00e1 qu\u1ea3 b\u00f3ng l\u00e0 qu\u1ea3 b\u00f3ng l\u0103n \u0111i, di chuy\u1ec3n sang v\u1ecb tr\u00ed kh\u00e1c. L\u00fac n\u00e0y, c\u1ea7u th\u1ee7 \u0111\u00f3 \u0111\u00e3 t\u00e1c d\u1ee5ng m\u1ed9t l\u1ef1c \u0111\u1ea9y v\u00e0o qu\u1ea3 b\u00f3ng, khi\u1ebfn cho qu\u1ea3 b\u00f3ng di chuy\u1ec3n. K\u1ebft qu\u1ea3 qu\u1ea3 b\u00f3ng l\u0103n \u0111i ch\u00ednh l\u00e0 t\u00e1c d\u1ee5ng c\u1ee7a l\u1ef1c \u0111\u00e1 t\u1eeb c\u1ea7u th\u1ee7 g\u00e2y ra. T\u00ecm hi\u1ec3u v\u1ec1 k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng l\u1ef1c ch\u00fang ta m\u1edbi hi\u1ec3u \u0111\u01b0\u1ee3c t\u1ea1i sao qu\u1ea3 b\u00f3ng l\u0103n.<\/p>\n\n\n\n
C\u1ea7u th\u1ee7 t\u00e1c \u0111\u1ed9ng l\u1ef1c v\u00e0o qu\u1ea3 b\u00f3ng<\/p>\n\n\n\n
V\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng, chuy\u1ec3n \u0111\u1ed9ng nhanh l\u00ean<\/p>\n\n\n\n
Khi c\u00f3 m\u1ed9t v\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng v\u1edbi t\u1ed1c \u0111\u1ed9 ch\u1eadm, \u0111\u1ed9t ng\u1ed9t chuy\u1ec3n \u0111\u1ed9ng nhanh l\u00ean. Th\u00ec \u0111\u00e2y c\u0169ng ch\u00ednh l\u00e0 1 trong nh\u1eefng k\u1ebft qu\u1ea3 c\u1ee7a t\u00e1c d\u1ee5ng l\u1ef1c. Ch\u00fang ta c\u00f3 th\u1ec3 l\u1ea5y v\u00ed d\u1ee5 t\u1eeb h\u00e0nh \u0111\u1ed9ng ch\u01a1i x\u00edch \u0111u. X\u00edch \u0111u \u0111ung \u0111\u01b0a nh\u1eb9 do gi\u00f3. Nh\u01b0ng khi ch\u00fang ta \u0111\u1ea9y v\u00e0o chi\u1ebfc x\u00edch \u0111u n\u00e0y, n\u00f3 s\u1ebd chuy\u1ec3n \u0111\u1ed9ng nhanh h\u01a1n. Khi \u0111\u00f3, chi\u1ebfc x\u00edch \u0111u \u0111\u00e3 ch\u1ecbu m\u1ed9t l\u1ef1c \u0111\u1ea9y t\u1eeb ch\u00fang ta. Ph\u01b0\u01a1ng chi\u1ec1u c\u1ee7a l\u1ef1c c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u00ean k\u1ebft qu\u1ea3 c\u1ee7a t\u00e1c d\u1ee5ng l\u1ef1c n\u00e0y.<\/p>\n\n\n\n
V\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng nhanh, chuy\u1ec3n \u0111\u1ed9ng ch\u1eadm l\u1ea1i<\/p>\n\n\n\n
B\u00ean c\u1ea1nh d\u1ea5u hi\u1ec7u chuy\u1ec3n \u0111\u1ed9ng nhanh l\u00ean c\u1ee7a v\u1eadt, l\u1ef1c c\u0169ng c\u00f3 th\u1ec3 khi\u1ebfn cho v\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng nhanh th\u00e0nh chuy\u1ec3n \u0111\u1ed9ng ch\u1eadm l\u1ea1i. Ch\u00fang ta c\u00f2n c\u00f3 th\u1ec3 g\u1ecdi l\u1ef1c n\u00e0y g\u1ecdi l\u00e0 l\u1ef1c c\u1ea3n, l\u1ef1c ma s\u00e1t,\u2026 t\u00f9y t\u1eebng tr\u01b0\u1eddng h\u1ee3p.<\/p>\n\n\n\n
V\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng theo h\u01b0\u1edbng n\u00e0y, b\u1ed7ng chuy\u1ec3n \u0111\u1ed9ng theo h\u01b0\u1edbng kh\u00e1c.<\/p>\n\n\n\n
V\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng theo h\u01b0\u1edbng ban \u0111\u1ea7u, \u0111\u1ed9t ng\u1ed9t \u0111\u1ed5i sang h\u01b0\u1edbng kh\u00e1c th\u00ec l\u00fac n\u00e0y v\u1eadt \u0111ang ch\u1ecbu t\u00e1c d\u1ee5ng c\u1ee7a m\u1ed9t l\u1ef1c kh\u00e1c. Ch\u00fang ta c\u00f3 th\u1ec3 l\u1ea5y v\u00ed d\u1ee5 nh\u01b0 h\u00ecnh \u1ea3nh chi\u1ebfc l\u00e1 r\u01a1i. Khi tr\u1eddi kh\u00f4ng c\u00f3 gi\u00f3, chi\u1ebfc l\u00e1 c\u00f3 th\u1ec3 r\u01a1i th\u1eb3ng xu\u1ed1ng \u0111\u1ea5t. Nh\u01b0ng khi tr\u1eddi c\u00f3 gi\u00f3, l\u00e1 s\u1ebd kh\u00f4ng r\u01a1i th\u1eb3ng m\u00e0 r\u01a1i xi\u00ean sang h\u01b0\u1edbng kh\u00e1c. Th\u00ec l\u00fac n\u00e0y, chi\u1ebfc l\u00e1 \u0111ang ch\u1ecbu th\u00eam t\u00e1c \u0111\u1ed9ng l\u1ef1c \u0111\u1ea9y c\u1ee7a gi\u00f3 l\u00e0m cho chi\u1ebfc l\u00e1 \u0111\u1ed5i h\u01b0\u1edbng. T\u00ecm hi\u1ec3u v\u1ec1 k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng l\u1ef1c ch\u00fang ta c\u00f3 th\u1ec3 ph\u00e2n t\u00edch \u0111\u01b0\u1ee3c nhi\u1ec1u hi\u1ec7n t\u01b0\u1ee3ng trong cu\u1ed9c s\u1ed1ng.<\/p>\n\n\n\n
T\u00ecm hi\u1ec3u v\u1ec1 \u0110\u1ecbnh lu\u1eadt H\u00fac<\/p><\/blockquote>\n\n\n\n
Nh\u1eefng s\u1ef1 bi\u1ebfn d\u1ea1ng khi c\u00f3 t\u00e1c d\u1ee5ng l\u1ef1c<\/p>\n\n\n\n
S\u1ef1 bi\u1ebfn d\u1ea1ng khi c\u00f3 t\u00e1c d\u1ee5ng l\u1ef1c c\u1ee7a v\u1eadt l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a qu\u00e1 tr\u00ecnh t\u00e1c d\u1ee5ng l\u1ef1c l\u00ean v\u1eadt. V\u1eadt c\u00f3 th\u1ec3 b\u1ecb thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng ho\u1eb7c k\u00edch th\u01b0\u1edbc so v\u1edbi h\u00ecnh d\u1ea1ng ban \u0111\u1ea7u. C\u00f3 r\u1ea5t nhi\u1ec1u v\u00ed d\u1ee5 cho k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng l\u1ef1c n\u00e0y. Ch\u1eafc h\u1eb3n c\u00e1c em \u0111\u00e3 t\u1eebng bi\u1ebft \u0111\u1ebfn chi\u1ebfc l\u00f2 xo. Khi ch\u00fang ta k\u00e9o gi\u00e3n l\u00f2 xo hay \u00e9p l\u00f2 xo th\u00ec h\u00ecnh d\u1ea1ng c\u1ee7a chi\u1ebfc l\u00f2 xo s\u1ebd b\u1ecb bi\u1ebfn \u0111\u1ed5i. \u0110\u00e2y ch\u00ednh l\u00e0 qu\u00e1 tr\u00ecnh t\u00e1c d\u1ee5ng l\u1ef1c t\u1eeb tay ta v\u00e0o chi\u1ebfc l\u00f2 xo n\u00e0y. T\u00f9y v\u00e0o l\u1ef1c \u1ea5n hay l\u1ef1c k\u00e9o gi\u00e3n m\u00e0 chi\u1ebfc l\u00f2 xo b\u1ecb bi\u1ebfn d\u1ea1ng.<\/p>\n\n\n\n
Th\u1ee7 m\u00f4n c\u1ea3n l\u1ef1c qu\u1ea3 b\u00f3ng<\/p>\n\n\n\n
\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf<\/p>\n\n\n\n
T\u00ecm hi\u1ec3u v\u1ec1 k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng l\u1ef1c c\u00e1c em s\u1ebd \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c v\u00e0o nhi\u1ec1u t\u00ecnh hu\u1ed1ng trong th\u1ef1c t\u1ebf. Kh\u00f4ng ph\u1ea3i t\u1ef1 nhi\u00ean, nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o ch\u01b0\u01a1ng tr\u00ecnh gi\u1ea3ng d\u1ea1y d\u00e0nh cho c\u00e1c em. \u0110\u00e2y s\u1ebd l\u00e0 nh\u1eefng ki\u1ebfn th\u1ee9c \u0111\u1ed3ng h\u00e0nh v\u1edbi c\u00e1c em tr\u00ean \u0111\u01b0\u1eddng \u0111\u1eddi sau n\u00e0y. C\u00e1c em n\u00ean tr\u00e2n tr\u1ecdng nh\u1eefng g\u00ec \u0111\u01b0\u1ee3c h\u1ecdc tr\u00ean l\u1edbp v\u00e0 th\u1ef1c h\u00e0nh v\u00e0o \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y nh\u00e9!<\/p>\n\n\n\n
C\u00f3 th\u1ec3 n\u00f3i, nh\u1eefng ki\u1ebfn th\u1ee9c t\u00ecm hi\u1ec3u v\u1ec1 k\u1ebft qu\u1ea3 t\u00e1c d\u1ee5ng l\u1ef1c \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i \u0111\u1ec1 c\u1eadp \u0111\u1ebfn tr\u00ean \u0111\u00e2y. Nh\u1eefng l\u00fd gi\u1ea3i v\u00e0 v\u00ed d\u1ee5 \u0111i k\u00e8m \u0111\u1ec1u v\u00f4 c\u00f9ng d\u1ec5 hi\u1ec3u. C\u00e1c em n\u00ean \u0111\u1ecdc v\u00e0 ghi nh\u1edb \u0111\u1ec3 v\u1eadn d\u1ee5ng h\u00e0ng ng\u00e0y. M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp th\u1ef1c h\u00e0nh tr\u00ean l\u1edbp s\u1ebd h\u1ecfi nh\u1eefng c\u00e2u t\u00ecnh hu\u1ed1ng, v\u00ed d\u1ee5 nh\u01b0 v\u1eady. C\u00e1c em c\u00f3 th\u1ec3 coi \u0111\u00e2y nh\u01b0 m\u1ed9t g\u1ee3i \u00fd \u0111\u1ec3 gi\u00fap c\u00e1c em l\u00e0m b\u00e0i t\u1ed1t h\u01a1n. Nh\u1eefng b\u00e0i vi\u1ebft v\u1ec1 ch\u1ee7 \u0111\u1ec1 v\u1eadt l\u00fd l\u1edbp 6 \u0111ang \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i \u0111\u0103ng t\u1ea3i tr\u00ean trang ch\u1ee7. C\u00e1c em h\u00e3y truy c\u1eadp \u0111\u1ec3 t\u00ecm hi\u1ec3u th\u00eam nh\u00e9! C\u1ea3m \u01a1n c\u00e1c em \u0111\u00e3 \u0111\u00f3n \u0111\u1ecdc b\u00e0i vi\u1ebft h\u00f4m nay.<\/p>\n\n\n\n
Xem th\u00eam c\u00e1c b\u00e0i vi\u1ebft kh\u00e1c<\/p><\/blockquote>\n\n\n\n
V\u1eadt l\u00fd 6: T\u00ecm hi\u1ec3u v\u1ec1 hai l\u1ef1c c\u00e2n b\u1eb1ng?)<\/p>\n\n\n\n
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<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Ch\u00fang ta \u0111\u00e3 bi\u1ebft \u0111\u1ebfn s\u1ef1 t\u00e1c d\u1ee5ng c\u1ee7a l\u1ef1c trong b\u00e0i vi\u1ebft tr\u01b0\u1edbc. Khi c\u00f3 l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean m\u1ed9t v\u1eadt, s\u1ebd c\u00f3 nh\u1eefng k\u1ebft qu\u1ea3 x\u1ea3y ra. Ch\u00fang ta ph\u1ea3i d\u1ef1a v\u00e0o k\u1ebft qu\u1ea3 c\u1ee7a l\u1ef1c \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a l\u1ef1c. V\u1eady c\u00e1c em \u0111\u00e3 […]<\/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-1141","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\/1141","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=1141"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1141\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1141"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1141"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}