T\u1ed5ng h\u1ee3p c\u00e1c ki\u1ebfn th\u1ee9c chung v\u1ec1 chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u v\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u00ed d\u1ee5 c\u01a1 b\u1ea3n \u0111\u1ec3 gi\u00fap b\u1ea1n hi\u1ec3u h\u01a1n \u0111\u1ec3 gi\u1ea3i c\u00e1c b\u00e0i t\u1eadp n\u00e2ng cao<\/p>\n

I\/ L\u00fd thuy\u1ebft chung chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u<\/h2>\n

1\/ \u0110\u1ecbnh ngh\u0129a chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n l\u00e0 g\u00ec v\u00e0 t\u1ed1c \u0111\u1ed9 trung b\u00ecnh?<\/h3>\n

\n
• M\u1ed9t chuy\u1ec3n \u0111\u1ed9ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n khi m\u00e0\u00a0chuy\u1ec3n \u0111\u1ed9ng \u0111\u00f3 c\u00f3 qu\u1ef9 \u0111\u1ea1o l\u00e0 1\u00a0\u0111\u01b0\u1eddng tr\u00f2n.<\/li>\n
• Ta c\u00f3 t\u1ed1c \u0111\u1ed9 trung b\u00ecnh c\u1ee7a 1 chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng th\u01b0\u01a1ng s\u1ed1 c\u1ee7a\u00a0\u0111\u1ed9 d\u00e0i cung tr\u00f2n m\u00e0 1 v\u1eadt \u0111i \u0111\u01b0\u1ee3c v\u1edbi\u00a0th\u1eddi gian v\u1eadt \u0111i h\u1ebft cung tr\u00f2n \u0111\u00f3:<\/li>\n
• Ta c\u00f3 c\u00f4ng th\u1ee9c vtb =\u00a0\u0394s \/\u00a0\u0394t<\/li>\n<\/ul>\n

  <\/p>\n

  2\/ Kh\u00e1i ni\u1ec7m chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u<\/h3>\n

  \n
  • Chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u l\u00e0 1 chuy\u1ec3n \u0111\u1ed9ng c\u00f3 qu\u1ef9 \u0111\u1ea1o l\u00e0 1 \u0111\u01b0\u1eddng tr\u00f2n m\u00e0 v\u1eadt \u0111i \u0111\u01b0\u1ee3c nh\u1eefng cung tr\u00f2n c\u00f3 \u0111\u1ed9 d\u00e0u b\u1eb1ng nhau trong c\u00f9ng\u00a0kho\u1ea3ng th\u1eddi gian b\u1eb1ng nhau b\u1ea5t k\u00ec.<\/li>\n<\/ul>\n

    3\/ C\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u<\/h3>\n

    a\/ V\u1eadn t\u1ed1c (hay c\u00f2n g\u1ecdi l\u00e0 v\u1eadn t\u1ed1c d\u00e0i) c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u:<\/strong><\/p>\n

    Ta c\u00f3: v =\u00a0\u0394s \/\u00a0\u0394t<\/p>\n

    Trong \u0111i\u1ec1u ki\u1ec7n l\u00e0 cung tr\u00f2n c\u00f3 \u0111\u1ed9 d\u00e0i r\u1ea5t nh\u1ecf\u00a0ta c\u00f3 th\u1ec3 coi nh\u01b0 l\u00e0 1 \u0111o\u1ea1n th\u1eb3ng th\u00ec vect\u01a1 ch\u1ec9 qu\u00e3ng \u0111\u01b0\u1eddng v\u1eadt \u0111i \u0111\u01b0\u1ee3c v\u00e0 c\u00f9ng h\u01b0\u1edbng chuy\u1ec3n \u0111\u1ed9ng th\u00ec \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 vect\u01a1 \u0111\u1ed9 d\u1eddi. Khi \u0111\u00f3 ta c\u00f3 vect\u01a1 v\u1eadn t\u1ed1c \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo c\u00f4ng th\u1ee9c sau:<\/p>\n

    <\/p>\n

    Trong \u0111\u00f3 ta c\u00f3 n\u1eb1m d\u1ecdc theo ti\u1ebfp tuy\u1ebfn t\u1ea1i \u0111i\u1ec3m M,<\/p>\n

    V\u00ec ta c\u00f3 \u00a0c\u00f9ng h\u01b0\u1edbng v\u1edbi \u00a0n\u00ean \u00a0c\u0169ng n\u1eb1m theo ti\u1ebfp tuy\u1ebfn t\u1ea1i \u0111i\u1ec3m M<\/p>\n

    <\/p>\n

    Vec t\u01a1 v\u1eadn t\u1ed1c trong chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u lu\u00f4n c\u00f3 ph\u01b0\u01a1ng ti\u1ebfp tuy\u1ebfn v\u1edbi \u0111\u01b0\u1eddng tr\u00f2n qu\u1ef9 \u0111\u1ea1o.<\/p>\n

    N\u00f3 c\u00f3 \u0111\u1ed9 d\u00e0i kh\u00f4ng \u0111\u1ed5i, nh\u01b0ng c\u00f3 ph\u01b0\u01a1ng lu\u00f4n lu\u00f4n thay \u0111\u1ed5i.<\/p>\n

    V\u00ec v\u1eady ta c\u00f3 V\u00e9c t\u01a1 v\u1eadn t\u1ed1c c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n lu\u00f4n c\u00f3 ph\u01b0\u01a1ng ti\u1ebfp tuy\u1ebfn v\u1edbi \u0111\u01b0\u1eddng tr\u00f2n qu\u1ef9 \u0111\u1ea1o \u0111\u00f3 v\u00e0 lu\u00f4n lu\u00f4n thay \u0111\u1ed5i. Gi\u00e1 tr\u1ecb \u0111\u1ed9 l\u1edbn c\u1ee7a v\u1eadn t\u1ed1c th\u00ec\u00a0kh\u00f4ng \u0111\u1ed5i.<\/p>\n

    b\/ T\u1ed1c \u0111\u1ed9 g\u00f3c (\u03c9):<\/strong><\/p>\n

    T\u1ed1c \u0111\u1ed9 c\u1ee7a v\u1eadt chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u \u0111\u01b0\u1ee3c l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng g\u00f3c m\u00e0 c\u00f3 b\u00e1n k\u00ednh l\u00e0 OM qu\u00e9t \u0111\u01b0\u1ee3c trong 1 \u0111\u01a1n v\u1ecb th\u1eddi gian. V\u00ec v\u1eady t\u1ed1c \u0111\u1ed9 g\u00f3c c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u l\u00e0 1 \u0111\u1ea1i l\u01b0\u1ee3ng kh\u00f4ng \u0111\u1ed5i.<\/p>\n

    Ta c\u00f3\u00a0\u03c9 =\u00a0\u00a0\u2206\u03b1 \/ \u2206t trong \u0111\u00f3 \u2206\u03b1 l\u00e0 g\u00f3c m\u00e0 c\u00f3 b\u00e1n k\u00ednh n\u1ed1i t\u1eeb t\u00e2m \u0111\u01b0\u1eddng tr\u00f2n \u0111\u1ebfn v\u1eadt qu\u00e9t \u0111\u01b0\u1ee3c trong th\u1eddi gian l\u00e0 \u2206t.<\/p>\n

    \u0110\u01a1n v\u1ecb \u0111o c\u1ee7a t\u1ed1c \u0111\u1ed9 g\u00f3c l\u00e0 rad\/s.<\/p>\n

    c\/ Chu k\u00ec (T) c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u: <\/strong><\/p>\n

    Chu k\u00ec\u00a0c\u1ee7a 1 chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u l\u00e0 kho\u1ea3ng th\u1eddi gian \u0111\u1ec3 v\u1eadt \u0111\u00f3 \u0111i \u0111\u01b0\u1ee3c 1\u00a0v\u00f2ng.<\/p>\n

    Ta c\u00f3 T = 2\u03c0 \/ \u03c9 .<\/p>\n

    \u0110\u01a1n v\u1ecb t\u00ednh c\u1ee7a chu k\u00ec l\u00e0 gi\u00e2y (s).<\/p>\n

    d\/ T\u1ea7n s\u1ed1 (f): <\/strong><\/p>\n

    T\u1ea7n s\u1ed1 c\u1ee7a 1v\u1eadt chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u ch\u00ednh l\u00e0 s\u1ed1 v\u00f2ng m\u00e0 v\u1eadt \u0111\u00f3 \u0111i \u0111\u01b0\u1ee3c trong 1\u00a0gi\u00e2y<\/p>\n

    Ta c\u00f3 c\u00f4ng th\u1ee9c: f = 1 \/ T .<\/p>\n

    \u0110\u01a1n v\u1ecb \u0111o c\u1ee7a t\u1ea7n s\u1ed1 l\u00e0 v\u00f2ng \/s ho\u1eb7c l\u00e0 hec (Hz).<\/p>\n

    e\/ C\u00f4ng th\u1ee9c li\u00ean h\u1ec7 gi\u1eefa v\u1eadn t\u1ed1c d\u00e0i v\u00e0 v\u1eadn t\u1ed1c g\u00f3c.<\/strong><\/p>\n

    Ta c\u00f3 c\u00f4ng th\u1ee9c: v =\u00a0\u03c9.r trong \u0111\u00f3 ta c\u00f3 r l\u00e0 b\u00e1n k\u00ednh c\u1ee7a qu\u1ef9 \u0111\u1ea1o<\/p>\n

    4\/ Gia t\u1ed1c h\u01b0\u1edbng t\u00e2m c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u<\/h3>\n

    a\/ H\u01b0\u1edbng<\/u> c\u1ee7<\/u>a<\/u>\u00a01 v\u00e9ct\u01a1 gia t\u1ed1c trong chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u<\/u>.<\/strong><\/p>\n

    Trong chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u, tuy v\u1eadn t\u1ed1c c\u00f3 \u0111\u1ed9 l\u1edbn kh\u00f4ng \u0111\u1ed5i, nh\u01b0ng c\u00f3 h\u01b0\u1edbng lu\u00f4n thay \u0111\u1ed5i, n\u00ean chuy\u1ec3n \u0111\u1ed9ng n\u00e0y c\u00f3 gia t\u1ed1c. Gia t\u1ed1c trong chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u lu\u00f4n h\u01b0\u1edbng v\u00e0o t\u00e2m c\u1ee7a qu\u1ef9 \u0111\u1ea1o n\u00ean g\u1ecdi l\u00e0 gia t\u1ed1c h\u01b0\u1edbng t\u00e2m.<\/p>\n

    b\/ \u00a0\u0110\u1ed9 l\u1edbn c\u1ee7a gia t\u1ed1c h\u01b0\u1edbng t\u00e2m trong chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u<\/u>.<\/strong>\u00a0\u00a0<\/strong><\/p>\n

    Ta c\u00f3 c\u00f4ng th\u1ee9c \u0111\u1ed9 l\u1edbn c\u1ee7a gia t\u1ed1c h\u01b0\u1edbng t\u00e2m: aht_{\u00a0<\/sub>= v\u00b2 \/ r = r\u03c9\u00b2.<\/p>\n}

    <\/p>\n

    II\/ B\u00e0i t\u1eadp chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u:<\/h2>\n

    \u0110\u1ec3 gi\u1ea3i c\u00e1c b\u00e0i t\u1eadp n\u00e0y ta c\u1ea7n v\u1eadn d\u1ee5ng c\u00e1c c\u00f4ng th\u1ee9c trong chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u<\/p>\n

    – \u00a0Chu k\u00ec T = 2\u03c0 \/ \u03c9<\/p>\n

    – \u00a0T\u1ea7n s\u1ed1: f = 1 \/ T =\u00a0\u03c9 \/\u00a02\u03c0<\/p>\n

    – \u00a0Gia t\u1ed1c h\u01b0\u1edbng t\u00e2m:\u00a0aht_{\u00a0<\/sub>= v\u00b2 \/ r = r\u03c9\u00b2..<\/p>\n}

    C\u00f4ng th\u1ee9c li\u00ean h\u1ec7 gi\u1eefa t\u1ed1c \u0111\u1ed9 d\u00e0i\u00a0v\u00e0 t\u1ed1c \u0111\u1ed9 g\u00f3c: v = r\u03c9\u00b2.<\/p>\n

    V\u00ed d\u1ee5 1:<\/strong><\/p>\n

    M\u1ed9t xe \u0111\u1ea1p c\u1ee7a v\u1eadn \u0111\u1ed9ng vi\u00ean c\u00f3 chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng \u0111\u1ec1u v\u1edbi v = 36km\/h. Cho bi\u1ebft b\u00e1n k\u00ednh c\u1ee7a l\u1ed1p b\u00e1nh xe \u0111\u1ea1p n\u00e0y l\u00e0 32,5cm. T\u00ednh t\u1ed1c \u0111\u1ed9 g\u00f3c, gia t\u1ed1c h\u01b0\u1edbng t\u00e2m t\u1ea1i 1\u00a0\u0111i\u1ec3m tr\u00ean l\u1ed1p b\u00e1nh xe n\u00e0y.<\/p>\n

    Gi\u1ea3i:<\/strong><\/p>\n

    Ta c\u00f3 r = 32,5cm = 0,325m<\/p>\n

    Ta c\u00f3 v\u1eadn t\u1ed1c c\u1ee7a xe \u0111\u1ea1p c\u0169ng l\u00e0 t\u1ed1c \u0111\u1ed9 d\u00e0i c\u1ee7a 1\u00a0\u0111i\u1ec3m tr\u00ean l\u1ed1p xe l\u00e0: v = 36km\/h \u21d4 v = 10 m\/s<\/p>\n

    V\u1eady\u00a0t\u1ed1c \u0111\u1ed9 g\u00f3c l\u00e0:\u00a0\u03c9 = \u00a0v \/\u00a0r = 10 \/ 0,325 = 30,77 rad\/s<\/p>\n

    Ta c\u00f3 gia t\u1ed1c h\u01b0\u1edbng t\u00e2m l\u00e0: aht_{\u00a0<\/sub>= v\u00b2 \/ r = 10\u00b2 \/ 0,325 = 307,7 m\/s.<\/p>\n}

    V\u00ed d\u1ee5 2:<\/p>\n

    M\u1ed9t xe t\u1ea3i m\u00e0 b\u00e1nh xe c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u00e0 80cm chuy\u1ec3n \u0111\u1ed9ng \u0111\u1ec1u. H\u00e3y t\u00ednh chu k\u00ec, t\u1ea7n s\u1ed1\u00a0v\u00e0 t\u1ed1c \u0111\u1ed9 g\u00f3c c\u1ee7a \u0111\u1ea7u van xe t\u1ea3i n\u00e0y.<\/span><\/p>\n

    Gi\u1ea3i:<\/strong><\/p>\n

    Ta c\u00f3 r = 80cm = 0,8m<\/p>\n

    Ta c\u00f3 v\u1eadn t\u1ed1c xe t\u1ea3i b\u1eb1ng t\u1ed1c \u0111\u1ed9 d\u00e0i l\u00e0: v = 10m\/s<\/p>\n

    T\u1ed1c \u0111\u1ed9 g\u00f3c c\u1ee7a xe t\u1ea3i l\u00e0\u00a0\u03c9 = \u00a0v \/\u00a0r = 10 \/ 0,8 = 12,5 rad\/s<\/p>\n

    \u21d2 Chu k\u1ef3 c\u1ee7a xe t\u1ea3i l\u00e0 \u00a0T = 2\u03c0 \/ \u03c9 =\u00a02\u03c0 \/ 12,5 = 0,5 s<\/p>\n

    T\u1ea7n s\u1ed1 l\u00e0: f = 1\/ T = 1 \/ 0,5 = 2 v\u00f2ng \/ s<\/p>\n

    V\u00ed d\u1ee5 3:<\/strong><\/p>\n

    M\u1ed9t v\u1ec7 tinh M\u00a0c\u1ee7a Vi\u1ec7t Nam \u0111\u01b0\u1ee3c ph\u00f3ng l\u00ean qu\u1ef9 \u0111\u1ea1o v\u1ec7 tinh. Sau khi v\u1ec7 tinh ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh, v\u1ec7 tinh n\u00e0y chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u v\u1edbi v = 2,21 km\/h v\u00e0 \u1edf \u0111\u1ed9 cao 24000km so v\u1edbi m\u1eb7t \u0111\u1ea5t. Bi\u1ebft b\u00e1n k\u00ednh tr\u00e1i \u0111\u1ea5t\u00a0l\u00e0 689km. H\u00e3y t\u00ednh t\u1ed1c \u0111\u1ed9 g\u00f3c, chu k\u00ec\u00a0v\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a v\u1ec7 tinh M.<\/p>\n

    Gi\u1ea3i:<\/strong><\/p>\n

    Ta c\u00f3 v\u1ec7 tinh chuy\u1ec3n \u0111\u1ed9ng v\u1edbi v = 2,21 km\/h\u00a0\u21d4 \u00a0v = 0,61 m\/s<\/p>\n

    Ta c\u00f3 b\u00e1n k\u00ednh c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u l\u00e0: b\u00e1n k\u00ednh c\u1ee7a tr\u00e1i \u0111\u1ea5t c\u1ed9ng v\u1edbi \u0111\u1ed9 cao c\u1ee7a v\u1ec7 tinh so v\u1edbi m\u1eb7t \u0111\u1ea5t<\/p>\n

    r = R + h = 24000 + 689 = 24689 km = 24689.10\u00b3 m<\/p>\n

    Ta c\u00f3 t\u1ea7n s\u1ed1 g\u00f3c l\u00e0:<\/p>\n

    \u00a0\u03c9 = \u00a0v.r = 0,61 \/\u00a024689.10\u00b3 = 15060290 rad\/s<\/p>\n

    Chu k\u1ef3:\u00a0T = 2\u03c0 \/ \u03c9 =\u00a04,17.10-7s<\/p>\n

    T\u1ea7n s\u1ed1 chuy\u1ec3n \u0111\u1ed9ng l\u00e0 :<\/p>\n

    f = 1 \/ T = 1 \/\u00a04,17.10-7s = 2398135 v\u00f2ng \/ s<\/p>\n

    Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u v\u00e0 m\u1ed9t s\u1ed1 v\u00ed d\u1ee5 \u0111\u1ec3 c\u00e1c b\u1ea1n c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c c\u00e1c d\u1ea1ng chuy\u1ec3n \u0111\u1ed9ng. Ch\u00fac c\u00e1c b\u1ea1n \u00f4n thi t\u1ed1t<\/p>\n

    B\u00e0i t\u1eadp v\u00ed d\u1ee5 4<\/strong><\/p>\n

    V\u00e0nh ngo\u00e0i c\u1ee7a m\u1ed9t b\u00e1nh xe \u00f4 t\u00f4 c\u00f3 b\u00e1n k\u00ednh l\u00e0 25cm. T\u00ednh t\u1ed1c \u0111\u1ed9 g\u00f3c v\u00e0 gia t\u1ed1c h\u01b0\u1edbng t\u00e2m c\u1ee7a m\u1ed9t \u0111i\u1ec3m tr\u00ean v\u00e0nh ngo\u00e0i c\u1ee7a b\u00e1nh xe khi \u00f4 t\u00f4 \u0111ang ch\u1ea1y v\u1edbi t\u1ed1c \u0111\u1ed9 d\u00e0i 36k\/h.<\/p>\n

    T\u00f3m t\u1eaft<\/p>\n

    r = 25cm = 0.25m<\/p>\n

    v= 36km\/h = 10m\/s<\/p>\n

    \u03c9= ? , aht = ?<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Gi\u1ea3i<\/strong><\/p>\n

    T\u1ed1c \u0111\u1ed9 g\u00f3c c\u1ee7a m\u1ed9t \u0111i\u1ec3m tr\u00ean v\u00e0nh ngo\u00e0i c\u1ee7a b\u00e1nh xe l\u00e0 :<\/p>\n

    \u00a0\u00a0\u00a0v=r\u03c9 \u2192 \u03c9=v\/r=100.25=40 ( rad\/s )<\/p>\n

    Gia t\u1ed1c h\u01b0\u1edbng t\u00e2m c\u1ee7a m\u1ed9t \u0111i\u1ec3m tr\u00ean v\u00e0nh ngo\u00e0i c\u1ee7a b\u00e1nh xe l\u00e0 :<\/p>\n

    aht= vx<\/span>vx<\/span>r=1020.25=400 (m\/s2)<\/p>\n

    B\u00e0i t\u1eadp v\u00ed d\u1ee5 5:<\/strong> M\u1eb7t Tr\u0103ng quay 1 v\u00f2ng quanh Tr\u00e1i \u0110\u1ea5t h\u1ebft 27 ng\u00e0y \u0111\u00eam . T\u00ednh t\u1ed1c \u0111\u1ed9 g\u00f3c c\u1ee7a M\u1eb7t Mr\u0103ng quay quanh Tr\u00e1i \u0110\u1ea5t.<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Gi\u1ea3i<\/p>\n

    Chu k\u00ec quay c\u1ee7a M\u1eb7t Tr\u0103ng quay quanh Tr\u00e1i \u0110\u1ea5t :<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0T= 27 ng\u00e0y-\u0111\u00eam = 27.24.3600\u2248 2,33.106 s<\/p>\n

    T\u1ed1c \u0111\u1ed9 g\u00f3c c\u1ee7a M\u1eb7t Mr\u0103ng quay quanh Tr\u00e1i \u0110\u1ea5t<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0T=2\u03c0\/\u03c9\u2192\u03c9=2\u03c0T=2.3,142,33.106\u2248 2,70.10-6 \u00a0rad\/s<\/p>\n

     <\/p>\n","protected":false},"excerpt":{"rendered":"

    T\u1ed5ng h\u1ee3p c\u00e1c ki\u1ebfn th\u1ee9c chung v\u1ec1 chuy\u1ec3n \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u v\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u00ed d\u1ee5 c\u01a1 b\u1ea3n \u0111\u1ec3 gi\u00fap b\u1ea1n hi\u1ec3u h\u01a1n \u0111\u1ec3 gi\u1ea3i c\u00e1c b\u00e0i t\u1eadp… <\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[448,450,408,454,470],"tags":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts\/8431"}],"collection":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/comments?post=8431"}],"version-history":[{"count":0,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts\/8431\/revisions"}],"wp:attachment":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/media?parent=8431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/categories?post=8431"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/tags?post=8431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}