{"id":482012,"date":"2025-08-15T16:21:36","date_gmt":"2025-08-15T09:21:36","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=482012"},"modified":"2025-08-15T16:21:36","modified_gmt":"2025-08-15T09:21:36","slug":"tinh-cong","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/tinh-cong\/","title":{"rendered":"C\u00f4ng c\u01a1 h\u1ecdc l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c t\u00ednh c\u00f4ng chu\u1ea9n k\u00e8m v\u00ed d\u1ee5 minh h\u1ecda"},"content":{"rendered":"<p style=\"text-align: justify;\"><b>T\u00ednh c\u00f4ng<\/b><span style=\"font-weight: 400;\"> l\u00e0 kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u00e0 r\u1ea5t quan tr\u1ecdng trong l\u0129nh v\u1ef1c v\u1eadt l\u00fd, \u0111\u1eb7c bi\u1ec7t khi t\u00ecm hi\u1ec3u v\u1ec1 c\u00f4ng c\u01a1 h\u1ecdc. V\u1eady c\u00f4ng c\u01a1 h\u1ecdc l\u00e0 g\u00ec v\u00e0 c\u00e1ch t\u00ednh chu\u1ea9n nh\u01b0 th\u1ebf n\u00e0o? B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1ea3i th\u00edch chi ti\u1ebft v\u1ec1 kh\u00e1i ni\u1ec7m c\u00f4ng, c\u00f4ng th\u1ee9c t\u00ednh c\u00f9ng v\u1edbi v\u00ed d\u1ee5 minh h\u1ecda c\u1ee5 th\u1ec3, gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng n\u1eafm b\u1eaft v\u00e0 \u00e1p d\u1ee5ng.<\/span><\/p>\n<h2 style=\"text-align: justify;\"><b>C\u00f4ng c\u01a1 h\u1ecdc l\u00e0 g\u00ec?<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng c\u01a1 h\u1ecdc l\u00e0 kh\u00e1i ni\u1ec7m quan tr\u1ecdng gi\u00fap ch\u00fang ta hi\u1ec3u c\u00e1ch l\u1ef1c t\u1ea1o ra s\u1ef1 thay \u0111\u1ed5i trong chuy\u1ec3n \u0111\u1ed9ng. Vi\u1ec7c n\u1eafm r\u00f5 c\u00f4ng c\u01a1 h\u1ecdc l\u00e0 g\u00ec s\u1ebd gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng \u00e1p d\u1ee5ng v\u00e0o c\u00e1c b\u00e0i to\u00e1n v\u1eadt l\u00fd c\u0169ng nh\u01b0 trong th\u1ef1c t\u1ebf \u0111\u1eddi s\u1ed1ng.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>Kh\u00e1i ni\u1ec7m<\/b><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">V\u1ec1 b\u1ea3n ch\u1ea5t, c\u00f4ng c\u01a1 h\u1ecdc \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng t\u00edch gi\u1eefa l\u1ef1c t\u00e1c \u0111\u1ed9ng l\u00ean v\u1eadt v\u00e0 qu\u00e3ng \u0111\u01b0\u1eddng m\u00e0 v\u1eadt d\u1ecbch chuy\u1ec3n theo \u0111\u00fang h\u01b0\u1edbng c\u1ee7a l\u1ef1c \u0111\u00f3. \u0110\u00e2y l\u00e0 c\u00e1ch c\u1ee5 th\u1ec3 \u0111\u1ec3 \u0111o l\u01b0\u1eddng m\u1ee9c \u0111\u1ed9 chuy\u1ec3n giao n\u0103ng l\u01b0\u1ee3ng t\u1eeb m\u1ed9t h\u1ec7 th\u1ed1ng sang h\u1ec7 kh\u00e1c th\u00f4ng qua chuy\u1ec3n \u0111\u1ed9ng.<\/span><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-1.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-1-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-1-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-482020 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-1.jpg\" alt=\"tinh-cong-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Trong th\u1ef1c t\u1ebf, nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c nhau \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn l\u01b0\u1ee3ng c\u00f4ng \u0111\u01b0\u1ee3c t\u1ea1o ra. Tr\u01b0\u1edbc h\u1ebft, l\u1ef1c t\u00e1c d\u1ee5ng \u0111\u00f3ng vai tr\u00f2 quy\u1ebft \u0111\u1ecbnh: l\u1ef1c c\u00e0ng l\u1edbn, m\u1ee9c n\u0103ng l\u01b0\u1ee3ng truy\u1ec1n \u0111i c\u00e0ng cao, t\u1eeb \u0111\u00f3 c\u00f4ng th\u1ef1c hi\u1ec7n c\u0169ng t\u0103ng l\u00ean. Ti\u1ebfp theo l\u00e0 qu\u00e3ng \u0111\u01b0\u1eddng v\u1eadt d\u1ecbch chuy\u1ec3n \u2013 n\u1ebfu v\u1eadt di chuy\u1ec3n xa h\u01a1n d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00f9ng m\u1ed9t l\u1ef1c, c\u00f4ng sinh ra c\u0169ng nhi\u1ec1u h\u01a1n.\u00a0<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Tuy nhi\u00ean, <\/span><b>t\u00ednh c\u00f4ng<\/b><span style=\"font-weight: 400;\"> kh\u00f4ng ch\u1ec9 ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c v\u00e0 \u0111\u1ed9 d\u00e0i qu\u00e3ng \u0111\u01b0\u1eddng, m\u00e0 c\u00f2n b\u1ecb chi ph\u1ed1i b\u1edfi g\u00f3c gi\u1eefa h\u01b0\u1edbng l\u1ef1c v\u00e0 h\u01b0\u1edbng chuy\u1ec3n \u0111\u1ed9ng. N\u1ebfu l\u1ef1c kh\u00f4ng h\u01b0\u1edbng theo ph\u01b0\u01a1ng chuy\u1ec3n \u0111\u1ed9ng, ch\u1ec9 th\u00e0nh ph\u1ea7n song song v\u1edbi h\u01b0\u1edbng di chuy\u1ec3n m\u1edbi g\u00f3p ph\u1ea7n sinh c\u00f4ng. Khi g\u00f3c l\u1ec7ch c\u00e0ng l\u1edbn, c\u00f4ng th\u1ef1c hi\u1ec7n c\u00e0ng gi\u1ea3m, v\u00e0 n\u1ebfu l\u1ef1c vu\u00f4ng g\u00f3c v\u1edbi chuy\u1ec3n \u0111\u1ed9ng, c\u00f4ng b\u1eb1ng kh\u00f4ng.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>Khi n\u00e0o c\u00f3 c\u00f4ng c\u01a1 h\u1ecdc?<\/b><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft \u0111\u1ec3 xu\u1ea5t hi\u1ec7n c\u00f4ng c\u01a1 h\u1ecdc l\u00e0 ph\u1ea3i c\u00f3 s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa l\u1ef1c v\u00e0 s\u1ef1 d\u1ecbch chuy\u1ec3n c\u1ee7a v\u1eadt th\u1ec3. C\u1ee5 th\u1ec3, khi m\u1ed9t l\u1ef1c \u0111\u01b0\u1ee3c t\u00e1c \u0111\u1ed9ng l\u00ean v\u1eadt m\u00e0 v\u1eadt v\u1eabn \u0111\u1ee9ng y\u00ean, kh\u00f4ng c\u00f3 chuy\u1ec3n d\u1eddi theo h\u01b0\u1edbng c\u1ee7a l\u1ef1c, th\u00ec trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, kh\u00f4ng c\u00f3 c\u00f4ng c\u01a1 h\u1ecdc \u0111\u01b0\u1ee3c sinh ra. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu l\u1ef1c khi\u1ebfn v\u1eadt di chuy\u1ec3n, d\u00f9 ch\u1ec9 m\u1ed9t kho\u1ea3ng nh\u1ecf, th\u00ec l\u00fac \u0111\u00f3 c\u00f4ng c\u01a1 h\u1ecdc m\u1edbi h\u00ecnh th\u00e0nh.<\/span><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-2.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-2-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-2-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-482021 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-2.jpg\" alt=\"tinh-cong-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110i\u1ec1u n\u00e0y cho th\u1ea5y, c\u00f4ng c\u01a1 h\u1ecdc kh\u00f4ng ch\u1ec9 ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a l\u1ef1c, m\u00e0 c\u00f2n y\u00eau c\u1ea7u v\u1eadt ch\u1ecbu l\u1ef1c \u0111\u00f3 ph\u1ea3i c\u00f3 s\u1ef1 d\u1ecbch chuy\u1ec3n th\u1ef1c s\u1ef1. Qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed9ng c\u00e0ng d\u00e0i v\u00e0 l\u1ef1c t\u00e1c d\u1ee5ng c\u00e0ng m\u1ea1nh theo c\u00f9ng h\u01b0\u1edbng, th\u00ec c\u00f4ng \u0111\u01b0\u1ee3c t\u1ea1o ra c\u00e0ng l\u1edbn. Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, m\u1eb7c d\u00f9 c\u00f3 s\u1ef1 chuy\u1ec3n d\u1ecbch v\u00e0 l\u1ef1c, nh\u01b0ng n\u1ebfu h\u01b0\u1edbng c\u1ee7a l\u1ef1c vu\u00f4ng g\u00f3c v\u1edbi h\u01b0\u1edbng d\u1ecbch chuy\u1ec3n th\u00ec c\u00f4ng v\u1eabn b\u1eb1ng kh\u00f4ng, b\u1edfi kh\u00f4ng c\u00f3 th\u00e0nh ph\u1ea7n l\u1ef1c n\u00e0o t\u00e1c \u0111\u1ed9ng theo ph\u01b0\u01a1ng chuy\u1ec3n \u0111\u1ed9ng.<\/span><\/p>\n<h2 style=\"text-align: justify;\"><b>C\u00f4ng th\u1ee9c t\u00ednh c\u00f4ng c\u01a1 h\u1ecdc chu\u1ea9n x\u00e1c<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Sau khi n\u1eafm r\u00f5 kh\u00e1i ni\u1ec7m v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00f4ng c\u01a1 h\u1ecdc, b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 hi\u1ec3u ch\u00ednh x\u00e1c c\u00e1ch \u0111o c\u00f4ng th\u00f4ng qua nh\u1eefng c\u00f4ng th\u1ee9c chu\u1ea9n \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong v\u1eadt l\u00fd. T\u00f9y t\u1eebng t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3, ta s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng th\u1ee9c kh\u00e1c nhau \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng c\u00f4ng m\u00e0 l\u1ef1c th\u1ef1c hi\u1ec7n l\u00ean v\u1eadt.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>Tr\u01b0\u1eddng h\u1ee3p th\u1ee9 nh\u1ea5t<\/b><span style=\"font-weight: 400;\">, khi l\u1ef1c F\u00a0 t\u00e1c \u0111\u1ed9ng v\u00e0 l\u00e0m v\u1eadt d\u1ecbch chuy\u1ec3n m\u1ed9t qu\u00e3ng \u0111\u01b0\u1eddng s theo \u0111\u00fang ph\u01b0\u01a1ng c\u1ee7a l\u1ef1c, c\u00f4ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo c\u00f4ng th\u1ee9c: <\/span><b>A = F \u00d7 s<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Trong \u0111\u00f3:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">A l\u00e0 c\u00f4ng do l\u1ef1c th\u1ef1c hi\u1ec7n (\u0111\u01a1n v\u1ecb: Jun \u2013 J)<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">F l\u00e0 l\u1ef1c t\u00e1c d\u1ee5ng (Newton \u2013 N)<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">s l\u00e0 qu\u00e3ng \u0111\u01b0\u1eddng v\u1eadt d\u1ecbch chuy\u1ec3n (m\u00e9t \u2013 m)<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Jun l\u00e0 \u0111\u01a1n v\u1ecb \u0111o c\u00f4ng trong h\u1ec7 \u0111o l\u01b0\u1eddng qu\u1ed1c t\u1ebf, v\u1edbi c\u00f4ng th\u1ee9c quy \u0111\u1ed5i: <\/span><b>1 J = 1 N \u00d7 1 m = 1 Nm<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ngo\u00e0i ra, c\u00f4ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng kilojun (kJ), trong \u0111\u00f3 1 kJ = 1.000 J, gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a c\u00e1c ph\u00e9p t\u00ednh c\u00f3 gi\u00e1 tr\u1ecb l\u1edbn.<\/span><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-3.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-3-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-3-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-482022 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-3.jpg\" alt=\"tinh-cong-3\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p style=\"text-align: justify;\"><b>Tr\u01b0\u1eddng h\u1ee3p th\u1ee9 hai<\/b><span style=\"font-weight: 400;\">, khi l\u1ef1c kh\u00f4ng t\u00e1c \u0111\u1ed9ng ho\u00e0n to\u00e0n theo h\u01b0\u1edbng chuy\u1ec3n \u0111\u1ed9ng m\u00e0 h\u1ee3p v\u1edbi ph\u01b0\u01a1ng d\u1ecbch chuy\u1ec3n m\u1ed9t g\u00f3c\u00a0 \u03b1, ta \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c: <\/span><b>A = F \u00d7 s \u00d7 cos\u03b1<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u1ede \u0111\u00e2y:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">F: \u0111\u1ed9 l\u1edbn l\u1ef1c t\u00e1c d\u1ee5ng (N)<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">s: qu\u00e3ng \u0111\u01b0\u1eddng v\u1eadt di chuy\u1ec3n (m)<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">\u03b1: g\u00f3c gi\u1eefa ph\u01b0\u01a1ng l\u1ef1c v\u00e0 h\u01b0\u1edbng chuy\u1ec3n \u0111\u1ed9ng<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">A: c\u00f4ng th\u1ef1c hi\u1ec7n (J)<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Vi\u1ec7c l\u1ef1a ch\u1ecdn c\u00f4ng th\u1ee9c ph\u00f9 h\u1ee3p v\u1edbi t\u1eebng \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3 l\u00e0 b\u01b0\u1edbc quan tr\u1ecdng \u0111\u1ec3 gi\u1ea3i \u0111\u00fang c\u00e1c b\u00e0i to\u00e1n li\u00ean quan \u0111\u1ebfn c\u00f4ng c\u01a1 h\u1ecdc trong ch\u01b0\u01a1ng tr\u00ecnh v\u1eadt l\u00fd.<\/span><\/p>\n<h2 style=\"text-align: justify;\"><b>C\u00f4ng th\u1ee9c t\u00ednh c\u00f4ng su\u1ea5t d\u1ef1a tr\u00ean c\u00f4ng c\u01a1 h\u1ecdc<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng su\u1ea5t l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng ph\u1ea3n \u00e1nh t\u1ed1c \u0111\u1ed9 th\u1ef1c hi\u1ec7n c\u00f4ng trong m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh. N\u00f3i c\u00e1ch kh\u00e1c, c\u00f4ng su\u1ea5t cho bi\u1ebft m\u1ed9t thi\u1ebft b\u1ecb, \u0111\u1ed9ng c\u01a1 hay con ng\u01b0\u1eddi c\u00f3 th\u1ec3 sinh c\u00f4ng nhanh \u0111\u1ebfn m\u1ee9c n\u00e0o, t\u1eeb \u0111\u00f3 \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 ho\u1ea1t \u0111\u1ed9ng trong th\u1ef1c t\u1ebf.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng su\u1ea5t \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: <\/span><b>P = A \/ t<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Trong \u0111\u00f3:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">P l\u00e0 c\u00f4ng su\u1ea5t (Watt \u2013 W)<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">A l\u00e0 c\u00f4ng th\u1ef1c hi\u1ec7n (Jun \u2013 J)<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">t l\u00e0 th\u1eddi gian th\u1ef1c hi\u1ec7n c\u00f4ng (gi\u00e2y \u2013 s)<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110\u01a1n v\u1ecb \u0111o c\u00f4ng su\u1ea5t trong h\u1ec7 qu\u1ed1c t\u1ebf l\u00e0 O\u00e1t (W), v\u1edbi \u0111\u1ecbnh ngh\u0129a: 1W = 1J\/s. Trong c\u00e1c l\u0129nh v\u1ef1c y\u00eau c\u1ea7u c\u00f4ng su\u1ea5t l\u1edbn h\u01a1n, ng\u01b0\u1eddi ta th\u01b0\u1eddng s\u1eed d\u1ee5ng kilowatt (kW) ho\u1eb7c megawatt (MW), t\u01b0\u01a1ng \u1ee9ng v\u1edbi 1 kW = 1.000 W v\u00e0 1 MW = 1.000.000 W.<\/span><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-4.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-4-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-4-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-482023 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-4.jpg\" alt=\"tinh-cong-4\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-4.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-4-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-4-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ngo\u00e0i h\u1ec7 \u0111\u01a1n v\u1ecb SI, m\u1ed9t s\u1ed1 l\u0129nh v\u1ef1c c\u00f2n s\u1eed d\u1ee5ng \u0111\u01a1n v\u1ecb kh\u00e1c nh\u01b0 m\u00e3 l\u1ef1c \u0111\u1ec3 \u0111o c\u00f4ng su\u1ea5t \u0111\u1ed9ng c\u01a1. C\u1ee5 th\u1ec3:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">1 CV (m\u00e3 l\u1ef1c Ph\u00e1p) = 736 W<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">1 HP (m\u00e3 l\u1ef1c Anh) = 746 W<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ngo\u00e0i ra, trong ng\u00e0nh \u0111i\u1ec7n, c\u00f4ng su\u1ea5t ti\u00eau th\u1ee5 c\u00f2n \u0111\u01b0\u1ee3c t\u00ednh theo th\u1eddi gian s\u1eed d\u1ee5ng v\u1edbi \u0111\u01a1n v\u1ecb Watt-gi\u1edd (Wh) ho\u1eb7c Kilowatt-gi\u1edd (kWh), trong \u0111\u00f3:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">1 Wh = 3.600 J, 1 kWh = 3.600.000 J<\/span><\/p>\n<h2 style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 minh h\u1ecda c\u00e1ch t\u00ednh c\u00f4ng c\u01a1 h\u1ecdc<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u00e1ch \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c \u0111o c\u00f4ng c\u01a1 h\u1ecdc trong th\u1ef1c t\u1ebf, ch\u00fang ta h\u00e3y c\u00f9ng xem qua m\u1ed9t s\u1ed1 v\u00ed d\u1ee5 minh h\u1ecda c\u1ee5 th\u1ec3. Nh\u1eefng t\u00ecnh hu\u1ed1ng d\u01b0\u1edbi \u0111\u00e2y s\u1ebd gi\u00fap b\u1ea1n n\u1eafm v\u1eefng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00f4ng d\u1ef1a tr\u00ean l\u1ef1c t\u00e1c d\u1ee5ng, qu\u00e3ng \u0111\u01b0\u1eddng d\u1ecbch chuy\u1ec3n v\u00e0 h\u01b0\u1edbng di chuy\u1ec3n c\u1ee7a v\u1eadt.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 1<\/b><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">M\u1ed9t ng\u01b0\u1eddi th\u1ee3 x\u00e2y k\u00e9o m\u1ed9t x\u00f4 v\u1eefa n\u1eb7ng 15kg l\u00ean \u0111\u1ed9 cao 5m b\u1eb1ng r\u00f2ng r\u1ecdc \u0111\u1ed9ng, trong th\u1eddi gian 20 gi\u00e2y. Y\u00eau c\u1ea7u:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">T\u00ednh to\u00e1n c\u00f4ng h\u1ecdc m\u00e0 ng\u01b0\u1eddi \u0111\u00f3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">T\u00ednh th\u00eam c\u00f4ng su\u1ea5t c\u1ee7a ng\u01b0\u1eddi th\u1ee3 x\u00e2y trong qu\u00e1 tr\u00ecnh n\u00e0y<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: T\u00ednh l\u1ef1c c\u1ea7n \u0111\u1ec3 n\u00e2ng v\u1eadt <\/span><b>F=10\u00d7m=10\u00d715=150N<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: T\u00ednh to\u00e1n c\u00f4ng th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c<\/span><b> A=F\u00d7h=150\u00d75=750J<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: T\u00ednh to\u00e1n c\u00f4ng su\u1ea5t c\u1ee7a ng\u01b0\u1eddi th\u1ee3<\/span><b> P= A\/t = 20\/750 = 37,5W<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">C\u00f4ng ng\u01b0\u1eddi th\u1ee3 th\u1ef1c hi\u1ec7n: 750 J<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">C\u00f4ng su\u1ea5t ho\u1ea1t \u0111\u1ed9ng: 37,5 W<\/span><\/li>\n<\/ul>\n<h3 style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 2<\/b><\/h3>\n<p style=\"text-align: justify;\"><b>T\u00ednh c\u00f4ng<\/b><span style=\"font-weight: 400;\"> su\u1ea5t c\u1ee7a d\u00f2ng n\u01b0\u1edbc ch\u1ea3y qua m\u1ed9t \u0111\u1eadp cao 25m. Bi\u1ebft r\u1eb1ng l\u01b0u l\u01b0\u1ee3ng n\u01b0\u1edbc l\u00e0 120 m\u00b3\/ph\u00fat v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a n\u01b0\u1edbc l\u00e0 1.000 kg\/m\u00b3.\u00a0<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: T\u00ednh tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a 1 m\u00b3 n\u01b0\u1edbc <\/span><b>P=10\u00d7m=10\u00d71.000=10.000N<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: X\u00e1c \u0111\u1ecbnh th\u1ec3 t\u00edch n\u01b0\u1edbc ch\u1ea3y trong 1 ph\u00fat (60 gi\u00e2y) <\/span><b>V=120m3<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: X\u00e1c \u0111\u1ecbnh c\u00f4ng th\u1ef1c hi\u1ec7n khi n\u01b0\u1edbc r\u01a1i t\u1eeb \u0111\u1ed9 cao 25 m <\/span><b>A=V\u00d7P\u00d7h=120\u00d710.000\u00d725=30.000.000J<\/b><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-5.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-5-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-5-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-482024 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-5.jpg\" alt=\"tinh-cong-5\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-5.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-5-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-5-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 4: \u0110\u00e1nh gi\u00e1 c\u00f4ng su\u1ea5t d\u00f2ng n\u01b0\u1edbc <\/span><b>P=A\/t=30.000.00\/60=500.000W=500kW<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3: D\u00f2ng n\u01b0\u1edbc t\u1ea1o ra c\u00f4ng su\u1ea5t 500 kW khi ch\u1ea3y qua \u0111\u1eadp cao 25m v\u1edbi l\u01b0u l\u01b0\u1ee3ng 120 m\u00b3\/ph\u00fat. V\u00ed d\u1ee5 n\u00e0y cho th\u1ea5y c\u00e1ch v\u1eadn d\u1ee5ng c\u00f4ng th\u1ee9c \u0111o c\u00f4ng v\u00e0 c\u00f4ng su\u1ea5t trong b\u1ed1i c\u1ea3nh li\u00ean quan \u0111\u1ebfn th\u1ee7y n\u0103ng.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 3<\/b><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">M\u1ed9t ng\u01b0\u1eddi k\u00e9o m\u1ed9t g\u00e1o m\u00fac n\u01b0\u1edbc l\u00ean t\u1eeb gi\u1ebfng s\u00e2u 10m. Bi\u1ebft g\u00e1o c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 0,5 kg v\u00e0 ch\u1ee9a th\u00eam 10 l\u00edt n\u01b0\u1edbc (kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a n\u01b0\u1edbc l\u00e0 1000 kg\/m\u00b3). H\u00e3y <\/span><b>t\u00ednh c\u00f4ng<\/b><span style=\"font-weight: 400;\"> t\u1ed1i thi\u1ec3u c\u1ea7n th\u1ef1c hi\u1ec7n.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: T\u00ednh th\u1ec3 t\u00edch n\u01b0\u1edbc trong g\u00e1o <\/span><b>V=10 l\u00edt=0,01m3<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: T\u00ednh kh\u1ed1i l\u01b0\u1ee3ng n\u01b0\u1edbc <\/span><b>m(n)=V\u00d7D=0,01\u00d71000=10kg<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: T\u00ednh l\u1ef1c t\u1ed1i thi\u1ec3u \u0111\u1ec3 k\u00e9o g\u00e1o n\u01b0\u1edbc l\u00ean <\/span><b>F=10\u00d7(m(n) +m(g))=10\u00d7(10+0,5)=105N<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 4: T\u00ednh l\u01b0\u1ee3ng c\u00f4ng th\u1ef1c hi\u1ec7n \u0111\u1ec3 k\u00e9o g\u00e1o l\u00ean \u0111\u1ed9 cao 10 m <\/span><b>A=F\u00d7s=105\u00d710=1050J<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3: C\u00f4ng t\u1ed1i thi\u1ec3u ng\u01b0\u1eddi \u0111\u00f3 ph\u1ea3i th\u1ef1c hi\u1ec7n \u0111\u1ec3 k\u00e9o g\u00e1o n\u01b0\u1edbc l\u00ean l\u00e0 1050 J. Qua v\u00ed d\u1ee5 n\u00e0y, b\u1ea1n s\u1ebd hi\u1ec3u r\u00f5 c\u00e1ch t\u00ednh trong nh\u1eefng t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf c\u00f3 nhi\u1ec1u th\u00e0nh ph\u1ea7n kh\u1ed1i l\u01b0\u1ee3ng kh\u00e1c nhau.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 4<\/b><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">M\u1ed9t v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 2 kg r\u01a1i t\u1eeb \u0111\u1ed9 cao 6 m xu\u1ed1ng m\u1eb7t \u0111\u1ea5t. Y\u00eau c\u1ea7u:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\">T\u00ednh l\u01b0\u1ee3ng c\u00f4ng <span style=\"font-weight: 400;\">do tr\u1ecdng l\u1ef1c th\u1ef1c hi\u1ec7n.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 cao m\u00e0 m\u1ed9t v\u1eadt 5 kg ph\u1ea3i r\u01a1i \u0111\u1ec3 sinh ra c\u00f4ng b\u1eb1ng v\u1edbi tr\u01b0\u1eddng h\u1ee3p tr\u00ean.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: T\u00ednh tr\u1ecdng l\u1ef1c c\u1ee7a v\u1eadt 2 kg <\/span><b>P=10\u00d72=20N<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: T\u00ednh l\u01b0\u1ee3ng c\u00f4ng do tr\u1ecdng l\u1ef1c th\u1ef1c hi\u1ec7n khi v\u1eadt r\u01a1i t\u1eeb 6 m <\/span><b>A=P\u00d7h=20\u00d76=120J<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: T\u00ednh tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt n\u1eb7ng 5 kg <\/span><b>P\u2032=10\u00d75=50N<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 4: T\u00ednh \u0111\u1ed9 cao c\u1ea7n thi\u1ebft \u0111\u1ec3 v\u1eadt 5 kg r\u01a1i t\u1ea1o c\u00f4ng 120 J <\/span><b>h\u2032=A\/P\u2019=120\/50=2,4m<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3: C\u00f4ng do tr\u1ecdng l\u1ef1c th\u1ef1c hi\u1ec7n khi v\u1eadt 2 kg r\u01a1i t\u1eeb 6 m l\u00e0 120 J. \u0110\u1ec3 v\u1eadt n\u1eb7ng 5 kg t\u1ea1o ra c\u00f4ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, n\u00f3 ph\u1ea3i r\u01a1i t\u1eeb \u0111\u1ed9 cao 2,4 m. Qua v\u00ed d\u1ee5 n\u00e0y, b\u1ea1n d\u1ec5 d\u00e0ng hi\u1ec3u m\u1ed1i quan h\u1ec7 gi\u1eefa kh\u1ed1i l\u01b0\u1ee3ng, \u0111\u1ed9 cao v\u00e0 c\u00f4ng tr\u1ecdng l\u1ef1c.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 5<\/b><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">M\u1ed9t qu\u1ea3 d\u1eeba c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng 25 N r\u01a1i t\u1eeb tr\u00ean c\u00e2y cao 8 m xu\u1ed1ng m\u1eb7t \u0111\u1ea5t. H\u00e3y<\/span><b> t\u00ednh c\u00f4ng<\/b><span style=\"font-weight: 400;\"> do tr\u1ecdng l\u1ef1c sinh ra trong qu\u00e1 tr\u00ecnh r\u01a1i n\u00e0y.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh tr\u1ecdng l\u01b0\u1ee3ng qu\u1ea3 d\u1eeba <\/span><b>P=25N<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: X\u00e1c \u0111\u1ecbnh qu\u00e3ng \u0111\u01b0\u1eddng d\u1ecbch chuy\u1ec3n <\/span><b>s=8m<\/b><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-6.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-6-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-6-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-482025 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-6.jpg\" alt=\"tinh-cong-6\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-6.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-6-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-6-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: T\u00ednh l\u01b0\u1ee3ng c\u00f4ng do tr\u1ecdng l\u1ef1c th\u1ef1c hi\u1ec7n <\/span><b>A=P\u00d7s=25\u00d78=200J<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3: C\u00f4ng c\u1ee7a tr\u1ecdng l\u1ef1c khi qu\u1ea3 d\u1eeba r\u01a1i t\u1eeb \u0111\u1ed9 cao 8 m l\u00e0 200 J. Qua v\u00ed d\u1ee5 n\u00e0y, b\u1ea1n s\u1ebd th\u1ea5y r\u00f5 c\u00e1ch t\u00ednh trong chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng \u0111\u1ee9ng d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a tr\u1ecdng l\u1ef1c.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 6<\/b><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">M\u1ed9t nh\u00f3m h\u1ecdc sinh \u0111\u1ea9y xe ch\u1edf \u0111\u1ea5t t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B tr\u00ean \u0111o\u1ea1n \u0111\u01b0\u1eddng b\u1eb1ng ph\u1eb3ng. Sau khi \u0111\u1ed5 h\u1ebft \u0111\u1ea5t t\u1ea1i B, h\u1ecd \u0111\u1ea9y xe kh\u00f4ng t\u1ea3i quay tr\u1edf l\u1ea1i A theo c\u00f9ng m\u1ed9t \u0111\u01b0\u1eddng. H\u00e3y so s\u00e1nh c\u00f4ng sinh ra \u1edf l\u01b0\u1ee3t \u0111i v\u00e0 l\u01b0\u1ee3t v\u1ec1.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c <\/span>t\u00ednh <span style=\"font-weight: 400;\">c\u01a1 h\u1ecdc <\/span><b>A=F\u00d7s <\/b><span style=\"font-weight: 400;\">v\u1edbi A l\u00e0 c\u00f4ng th\u1ef1c hi\u1ec7n, F l\u00e0 l\u1ef1c t\u00e1c d\u1ee5ng v\u00e0 s l\u00e0 qu\u00e3ng \u0111\u01b0\u1eddng di chuy\u1ec3n<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: Ph\u00e2n t\u00edch l\u1ef1c t\u00e1c d\u1ee5ng \u1edf l\u01b0\u1ee3t \u0111i v\u00e0 l\u01b0\u1ee3t v\u1ec1 r\u1eb1ng khi \u0111\u1ea9y xe c\u00f3 \u0111\u1ea5t t\u1eeb A \u0111\u1ebfn B, l\u1ef1c c\u1ea7n d\u00f9ng l\u1edbn h\u01a1n do tr\u1ecdng l\u01b0\u1ee3ng xe n\u1eb7ng h\u01a1n. V\u00e0 khi \u0111\u1ea9y xe r\u1ed7ng t\u1eeb B v\u1ec1 A, l\u1ef1c t\u00e1c d\u1ee5ng nh\u1ecf h\u01a1n v\u00ec xe nh\u1eb9 h\u01a1n.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: So s\u00e1nh c\u00f4ng \u1edf hai l\u01b0\u1ee3t v\u00ec qu\u00e3ng \u0111\u01b0\u1eddng hai chi\u1ec1u b\u1eb1ng nhau, c\u00f4ng t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi l\u1ef1c. V\u00e0 l\u1ef1c l\u01b0\u1ee3t \u0111i l\u1edbn h\u01a1n n\u00ean c\u00f4ng sinh ra \u1edf l\u01b0\u1ee3t \u0111i nhi\u1ec1u h\u01a1n l\u01b0\u1ee3t v\u1ec1.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3: C\u00f4ng th\u1ef1c hi\u1ec7n khi \u0111\u1ea9y xe ch\u1edf \u0111\u1ea5t (l\u01b0\u1ee3t \u0111i) l\u1edbn h\u01a1n c\u00f4ng \u0111\u1ea9y xe kh\u00f4ng t\u1ea3i (l\u01b0\u1ee3t v\u1ec1) do l\u1ef1c t\u00e1c d\u1ee5ng kh\u00e1c nhau. Qua v\u00ed d\u1ee5 n\u00e0y, b\u1ea1n th\u1ea5y r\u00f5 m\u1ed1i quan h\u1ec7 gi\u1eefa l\u1ef1c v\u00e0 c\u00f4ng trong chuy\u1ec3n \u0111\u1ed9ng tr\u00ean \u0111o\u1ea1n \u0111\u01b0\u1eddng ngang.<\/span><\/p>\n<h2 style=\"text-align: justify;\"><b>\u1ee8ng d\u1ee5ng c\u1ee7a vi\u1ec7c t\u00ednh c\u00f4ng c\u01a1 h\u1ecdc trong th\u1ef1c ti\u1ec5n<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Trong l\u0129nh v\u1ef1c x\u00e2y d\u1ef1ng, c\u00f4ng th\u1ee9c \u0111o c\u00f4ng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh l\u1ef1c v\u00e0 n\u0103ng l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft khi n\u00e2ng v\u1eadt li\u1ec7u l\u00ean cao ho\u1eb7c k\u00e9o c\u00e1c thi\u1ebft b\u1ecb n\u1eb7ng. \u0110i\u1ec1u n\u00e0y gi\u00fap k\u1ef9 s\u01b0 l\u1ef1a ch\u1ecdn m\u00e1y m\u00f3c ph\u00f9 h\u1ee3p, \u0111\u1ea3m b\u1ea3o an to\u00e0n lao \u0111\u1ed9ng v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed v\u1eadn h\u00e0nh. Ngo\u00e0i ra, vi\u1ec7c t\u00ednh to\u00e1n c\u00f4ng c\u01a1 h\u1ecdc c\u0169ng h\u1ed7 tr\u1ee3 trong thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng r\u00f2ng r\u1ecdc, c\u1ea9u tr\u1ee5c ho\u1eb7c m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p nh\u1eb1m t\u0103ng hi\u1ec7u qu\u1ea3 v\u1eadn h\u00e0nh.<\/span><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-7.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-7-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2025\/08\/tinh-cong-7-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-482026 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-7.jpg\" alt=\"tinh-cong-7\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-7.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-7-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong-7-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Trong ng\u00e0nh giao th\u00f4ng, c\u00f4ng su\u1ea5t v\u00e0 c\u00f4ng c\u01a1 h\u1ecdc \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 l\u00e0m vi\u1ec7c c\u1ee7a \u0111\u1ed9ng c\u01a1, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n thi\u1ebft k\u1ebf v\u00e0 ti\u1ebft ki\u1ec7m nhi\u00ean li\u1ec7u. V\u00ed d\u1ee5, hi\u1ec3u r\u00f5 c\u00f4ng su\u1ea5t gi\u00fap nh\u00e0 s\u1ea3n xu\u1ea5t \u00f4 t\u00f4 v\u00e0 m\u00e1y bay thi\u1ebft k\u1ebf \u0111\u1ed9ng c\u01a1 m\u1ea1nh m\u1ebd nh\u01b0ng ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng, gi\u1ea3m kh\u00ed th\u1ea3i \u0111\u1ed9c h\u1ea1i.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ngo\u00e0i ra, trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y, vi\u1ec7c hi\u1ec3u c\u00f4ng c\u01a1 h\u1ecdc gi\u00fap m\u1ecdi ng\u01b0\u1eddi th\u1ef1c hi\u1ec7n c\u00e1c c\u00f4ng vi\u1ec7c th\u1ec3 ch\u1ea5t m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 h\u01a1n, tr\u00e1nh ti\u00eau hao n\u0103ng l\u01b0\u1ee3ng kh\u00f4ng c\u1ea7n thi\u1ebft. T\u00ednh to\u00e1n ch\u00ednh x\u00e1c c\u00f4ng th\u1ef1c hi\u1ec7n c\u0169ng gi\u00fap t\u1ed1i \u01b0u h\u00f3a c\u00e1c thi\u1ebft b\u1ecb gia d\u1ee5ng, nh\u01b0 m\u00e1y b\u01a1m n\u01b0\u1edbc, m\u00e1y gi\u1eb7t, qu\u1ea1t \u0111i\u1ec7n,&#8230;<\/span><\/p>\n<h2 style=\"text-align: justify;\"><b>K\u1ebft lu\u1eadn<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Vi\u1ec7c <\/span><b>t\u00ednh c\u00f4ng<\/b><span style=\"font-weight: 400;\"> trong c\u01a1 h\u1ecdc kh\u00f4ng ch\u1ec9 gi\u00fap hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 m\u1ed1i quan h\u1ec7 gi\u1eefa l\u1ef1c, qu\u00e3ng \u0111\u01b0\u1eddng v\u00e0 n\u0103ng l\u01b0\u1ee3ng m\u00e0 c\u00f2n \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c th\u1ef1c ti\u1ec5n. Vi\u1ec7c \u00e1p d\u1ee5ng ch\u00ednh x\u00e1c c\u00f4ng th\u1ee9c s\u1ebd gi\u00fap b\u1ea1n t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh l\u00e0m vi\u1ec7c, n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng ngu\u1ed3n l\u1ef1c v\u00e0 gi\u1ea3m thi\u1ec3u l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng.\u00a0<\/span><\/p>\n<p style=\"text-align: justify;\"><b>Xem th\u00eam:<\/b><\/p>\n<ul>\n<li>\n<p class=\"elementor-heading-title elementor-size-default\"><span style=\"color: #339966;\"><strong><a style=\"color: #339966;\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/chuyen-dong-co-hoc-la-gi\/\">Chuy\u1ec3n \u0111\u1ed9ng c\u01a1 h\u1ecdc l\u00e0 g\u00ec? N\u00eau c\u00e1c d\u1ea1ng chuy\u1ec3n \u0111\u1ed9ng c\u01a1 h\u1ecdc<\/a><\/strong><\/span><\/p>\n<\/li>\n<li>\n<p class=\"elementor-heading-title elementor-size-default\"><span style=\"color: #339966;\"><strong><a style=\"color: #339966;\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/xiaomi-black-shark-3-pro-se-co-them-2-nut-ho-tro-choi-game-co-hoc\/\">Xiaomi Black Shark 3 Pro s\u1ebd c\u00f3 th\u00eam 2 n\u00fat h\u1ed7 tr\u1ee3 ch\u01a1i game c\u01a1 h\u1ecdc.<\/a><\/strong><\/span><\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>T\u00ednh c\u00f4ng l\u00e0 kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u00e0 r\u1ea5t quan tr\u1ecdng trong l\u0129nh v\u1ef1c v\u1eadt l\u00fd, \u0111\u1eb7c bi\u1ec7t khi t\u00ecm hi\u1ec3u v\u1ec1 c\u00f4ng c\u01a1 h\u1ecdc. V\u1eady c\u00f4ng c\u01a1 h\u1ecdc l\u00e0 g\u00ec v\u00e0 c\u00e1ch t\u00ednh chu\u1ea9n nh\u01b0 th\u1ebf n\u00e0o? B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1ea3i th\u00edch chi ti\u1ebft v\u1ec1 kh\u00e1i ni\u1ec7m c\u00f4ng, c\u00f4ng th\u1ee9c t\u00ednh c\u00f9ng v\u1edbi [&hellip;]<\/p>\n","protected":false},"author":84,"featured_media":482019,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3910,30453],"tags":[],"class_list":["post-482012","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 v24.2 (Yoast SEO v24.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u00f4ng c\u01a1 h\u1ecdc l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c t\u00ednh c\u00f4ng chu\u1ea9n k\u00e8m v\u00ed d\u1ee5 minh h\u1ecda<\/title>\n<meta name=\"description\" content=\"B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n bi\u1ebft \u0111\u01b0\u1ee3c c\u00f4ng th\u1ee9c t\u00ednh c\u00f4ng chu\u1ea9n \u0111i k\u00e8m v\u1edbi r\u1ea5t nhi\u1ec1u v\u00ed d\u1ee5 minh h\u1ecda \u0111\u1ec3 \u00e1p d\u1ee5ng v\u00e0o th\u1ef1c ti\u1ec5n.\" \/>\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\/tinh-cong\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u00f4ng c\u01a1 h\u1ecdc l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c t\u00ednh c\u00f4ng chu\u1ea9n k\u00e8m v\u00ed d\u1ee5 minh h\u1ecda\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n bi\u1ebft \u0111\u01b0\u1ee3c c\u00f4ng th\u1ee9c t\u00ednh c\u00f4ng chu\u1ea9n \u0111i k\u00e8m v\u1edbi r\u1ea5t nhi\u1ec1u v\u00ed d\u1ee5 minh h\u1ecda \u0111\u1ec3 \u00e1p d\u1ee5ng v\u00e0o th\u1ef1c ti\u1ec5n.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/hoanghamobile.com\/tin-tuc\/tinh-cong\/\" \/>\n<meta property=\"og:site_name\" content=\"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/hoanghamobilecom\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/hoanghamobilecom\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-15T09:21:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"628\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Daisy Daisy\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Daisy Daisy\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"14 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/tinh-cong\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/tinh-cong\/\"},\"author\":{\"name\":\"Daisy Daisy\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/a7254cd2473ea15c26ef1b1fcd58398c\"},\"headline\":\"C\u00f4ng c\u01a1 h\u1ecdc l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c t\u00ednh c\u00f4ng chu\u1ea9n k\u00e8m v\u00ed d\u1ee5 minh h\u1ecda\",\"datePublished\":\"2025-08-15T09:21:36+00:00\",\"dateModified\":\"2025-08-15T09:21:36+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/tinh-cong\/\"},\"wordCount\":3478,\"publisher\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#organization\"},\"image\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/tinh-cong\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2025\/08\/tinh-cong.jpg\",\"articleSection\":[\"Kh\u00e1m Ph\u00e1\",\"Ki\u1ebfn Th\u1ee9c\"],\"inLanguage\":\"vi\",\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/tinh-cong\/\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/tinh-cong\/\",\"name\":\"C\u00f4ng c\u01a1 h\u1ecdc l\u00e0 g\u00ec? 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