Ch\u01b0\u01a1ng 2 - B\u00e0i 11: Dao \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c c\u1ed9ng h\u01b0\u1edfng<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/chuong-2-bai-11-dao-dong-cuong-buc-cong-huong\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 2 - B\u00e0i 11: Dao \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c c\u1ed9ng h\u01b0\u1edfng\" \/>\n<meta property=\"og:description\" content=\"C\u00c2U H\u1eceI C\u00e2u 1 (trang 56 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0Th\u1ebf n\u00e0o l\u00e0 s\u1ef1 c\u1ed9ng h\u01b0\u1edfng? S\u1ef1 c\u1ed9ng h\u01b0\u1edfng c\u00f3 l\u1ee3i hay c\u00f3 h\u1ea1i? L\u1eddi gi\u1ea3i: Xem m\u1ee5c 2 v\u00e0 5 SGK. 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{"id":25241,"date":"2018-04-04T17:14:35","date_gmt":"2018-04-04T10:14:35","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=25241"},"modified":"2018-04-04T17:14:35","modified_gmt":"2018-04-04T10:14:35","slug":"chuong-2-bai-11-dao-dong-cuong-buc-cong-huong","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/chuong-2-bai-11-dao-dong-cuong-buc-cong-huong\/","title":{"rendered":"Ch\u01b0\u01a1ng 2 – B\u00e0i 11: Dao \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c c\u1ed9ng h\u01b0\u1edfng"},"content":{"rendered":"

C\u00c2U H\u1eceI<\/strong><\/p>\n

C\u00e2u 1 (trang 56 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Th\u1ebf n\u00e0o l\u00e0 s\u1ef1 c\u1ed9ng h\u01b0\u1edfng? S\u1ef1 c\u1ed9ng h\u01b0\u1edfng c\u00f3 l\u1ee3i hay c\u00f3 h\u1ea1i?<\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Xem m\u1ee5c 2 v\u00e0 5 SGK.<\/p>\n

C\u00e2u 2 (trang 56 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Vi\u1ec7c t\u1ea1o n\u00ean dao \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c kh\u00e1c v\u1edbi vi\u1ec7c t\u1ea1o n\u00ean dao \u0111\u1ed9ng duy tr\u00ec nh\u01b0 th\u1ebf n\u00e0o?<\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Dao \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c \u0111\u01b0\u1ee3c x\u1ea3y ra d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a m\u1ed9t ngo\u1ea1i l\u1ef1c c\u00f3 t\u1ea7n s\u1ed1 g\u00f3c \u1f68, khi \u1ed5n \u0111\u1ecbnh dao \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c c\u00f3 t\u1ea7n s\u1ed1 l\u1ef1c c\u01b0\u1ee1ng b\u1ee9c \u1f68.<\/p>\n

Dao \u0111\u1ed9ng duy tr\u00ec c\u0169ng \u0111\u01b0\u1ee3c x\u1ea3y ra d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a ngo\u1ea1i l\u1ef1c, nh\u01b0ng ngo\u1ea1i l\u1ef1c \u1edf \u0111\u00e2y \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n \u0111\u1ec3 c\u00f3 t\u1ea7n s\u1ed1 g\u00f3c \u03c9 b\u1eb1ng t\u1ea7n s\u1ed1 g\u00f3c \u03c9_{o<\/sub>\u00a0c\u1ee7a dao \u0111\u1ed9g ri\u00ean c\u1ee7a h\u1ec7.<\/p>\n}

B\u00c0I T\u1eacP<\/strong><\/p>\n

B\u00e0i 1 (trang 56 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Bi\u00ean \u0111\u1ed9 c\u1ee7a dao \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c kh\u00f4ng ph\u1ee5 thu\u1ed9c<\/span><\/p>\n

A. Pha ban \u0111\u1ea7u c\u1ee7a ngo\u1ea1i l\u1ef1c tu\u1ea7n ho\u00e0n t\u00e1c d\u1ee5ng l\u00ean v\u1eadt.<\/p>\n

B. Bi\u00ean \u0111\u1ed9 ngo\u1ea1i l\u1ef1c tu\u1ea7n ho\u00e0n t\u00e1c d\u1ee5ng l\u00ean v\u1eadt.<\/p>\n

C. H\u1ec7 s\u1ed1 ngo\u1ea1i l\u1ef1c tu\u1ea7n ho\u00e0n t\u00e1c d\u1ee5ng l\u00ean v\u1eadt.<\/p>\n

D. H\u1ec7 s\u1ed1 l\u1ef1c c\u1ea3n (c\u1ee7a ma s\u00e1t nh\u1edbt) t\u00e1c d\u1ee5ng l\u00ean v\u1eadt dao \u0111\u1ed9ng.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn A.<\/p>\n

B\u00e0i 2 (trang 56 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0M\u1ed9t xe \u00f4 t\u00f4 ch\u1ea1y tr\u00ean \u0111\u01b0\u1eddng, c\u1ee9 c\u00e1ch 8m l\u1ea1i c\u00f3 m\u1ed9t c\u00e1i m\u00f4 nh\u1ecf. Chu k\u00ec dao \u0111\u1ed9ng t\u1ef1 do c\u1ee7a khung xe tr\u00ean c\u00e1c l\u00f2 xo l\u00e0 1,5s. xe ch\u1ea1y v\u1edbi v\u1eadn t\u1ed1c n\u00e0o th\u00ec b\u1ecb rung nh\u1ea5t.<\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Xe b\u1ecb rung nh\u1ea5t khi t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng ri\u00ean c\u1ee7a khung xe tr\u00ean c\u00e1c l\u00f2 xo (c\u1ed9ng h\u01b0\u1edfng).<\/p>\n

t\u1ea7n s\u1ed1 g\u00f3c = (v\u1eadn t\u1ed1c)\/8m<\/p>\n

T\u1ea7n s\u1ed1 ri\u00eang c\u1ee7a khung xe = 1\/1,5 s^{(-1)<\/sup>.<\/p>\n}

V\u1eady v\u1eadn t\u1ed1c = 8.1\/1.5 m\/s = 19,2 km\/s<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U H\u1eceI C\u00e2u 1 (trang 56 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0Th\u1ebf n\u00e0o l\u00e0 s\u1ef1 c\u1ed9ng h\u01b0\u1edfng? S\u1ef1 c\u1ed9ng h\u01b0\u1edfng c\u00f3 l\u1ee3i hay c\u00f3 h\u1ea1i? L\u1eddi gi\u1ea3i: Xem m\u1ee5c 2 v\u00e0 5 SGK. C\u00e2u 2 (trang 56 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0Vi\u1ec7c t\u1ea1o n\u00ean dao \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c kh\u00e1c v\u1edbi vi\u1ec7c t\u1ea1o n\u00ean dao […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1304],"tags":[1432,1431],"yoast_head":"\nCh\u01b0\u01a1ng 2 - B\u00e0i 11: Dao \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c c\u1ed9ng h\u01b0\u1edfng<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/chuong-2-bai-11-dao-dong-cuong-buc-cong-huong\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 2 - B\u00e0i 11: Dao \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c c\u1ed9ng h\u01b0\u1edfng\" \/>\n<meta property=\"og:description\" content=\"C\u00c2U H\u1eceI C\u00e2u 1 (trang 56 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0Th\u1ebf n\u00e0o l\u00e0 s\u1ef1 c\u1ed9ng h\u01b0\u1edfng? S\u1ef1 c\u1ed9ng h\u01b0\u1edfng c\u00f3 l\u1ee3i hay c\u00f3 h\u1ea1i? L\u1eddi gi\u1ea3i: Xem m\u1ee5c 2 v\u00e0 5 SGK. 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