{"common":{"save":0,"post_id":"8852","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8291","mon_id":"1158790","chapter_id":"1159899","post_id":"8852","question":"<p>Bi\u1ec3u th\u1ee9c n&agrave;o sau \u0111&acirc;y th\u1ec3 hi\u1ec7n m\u1ed1i li&ecirc;n h\u1ec7&nbsp;gi\u1eefa t\u1ed1c \u0111\u1ed9 d&agrave;i, t\u1ed1c \u0111\u1ed9 g&oacute;c v&agrave; chu k&igrave;&nbsp;quay?<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$v=\\omega.R=2\\pi.T.R$<\/span>.","<strong>B.<\/strong> <span class=\"math-tex\">$v=\\dfrac{\\omega}{R}=\\dfrac{2\\pi R}{T}$<\/span>.","<strong>C.<\/strong> <span class=\"math-tex\">$v=\\omega.R=\\dfrac{2\\pi R}{T}$<\/span>.","<strong>D.<\/strong> <span class=\"math-tex\">$v=\\dfrac{\\omega}{R}=\\dfrac{2\\pi}{TR}$<\/span>."],"correct":"3","level":"2","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong>&nbsp;<span class=\"math-tex\">$v=\\omega.R=\\dfrac{2\\pi R}{T}$<\/span>.<\/span><\/p><p>Bi\u1ec3u th\u1ee9c th\u1ec3 hi\u1ec7n m\u1ed1i li&ecirc;n h\u1ec7 gi\u1eefa t\u1ed1c \u0111\u1ed9&nbsp;d&agrave;i, t\u1ed1c \u0111\u1ed9 g&oacute;c v&agrave; chu k&igrave; quay:&nbsp;<span class=\"math-tex\">$v=\\omega.R=\\dfrac{2\\pi R}{T}$<\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-13 09:54:47","option_type":"math","len":0},{"id":"8292","mon_id":"1158790","chapter_id":"1159899","post_id":"8852","question":"<p>C&aacute;c c&ocirc;ng th\u1ee9c li&ecirc;n h\u1ec7 gi\u1eefa t\u1ed1c \u0111\u1ed9 g&oacute;c <span class=\"math-tex\">$\\omega$<\/span>&nbsp;v\u1edbi chu k\u1ef3 T v&agrave; gi\u1eefa t\u1ed1c \u0111\u1ed9 g&oacute;c <span class=\"math-tex\">$\\omega$<\/span>&nbsp;v\u1edbi t\u1ea7n&nbsp;s\u1ed1 <span class=\"math-tex\">$f$<\/span> trong chuy\u1ec3n \u0111\u1ed9ng tr&ograve;n \u0111\u1ec1u l&agrave;<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\omega=\\dfrac{2\\pi}{T};\\omega=2\\pi f$<\/span>.","<strong>B.<\/strong> <span class=\"math-tex\">$\\omega=2\\pi T;\\omega=2\\pi f$<\/span>.","<strong>C.<\/strong> <span class=\"math-tex\">$\\omega=2\\pi T;\\omega=\\dfrac{2\\pi}{f}$<\/span>.","<strong>D.<\/strong> <span class=\"math-tex\">$\\omega=\\dfrac{2\\pi}{T};\\omega=\\dfrac{2\\pi}{ f}$<\/span>."],"correct":"1","level":"2","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong>&nbsp;<span class=\"math-tex\">$\\omega=\\dfrac{2\\pi}{T};\\omega=2\\pi f$<\/span>.<\/span><\/p><p>C&ocirc;ng th\u1ee9c li&ecirc;n h\u1ec7 gi\u1eefa t\u1ed1c \u0111\u1ed9 g&oacute;c <span class=\"math-tex\">$\\omega$<\/span>&nbsp;v\u1edbi chu k\u1ef3 T l&agrave;&nbsp;<span class=\"math-tex\">$\\omega=\\dfrac{2\\pi}{T}$<\/span>.<\/p><p>C&ocirc;ng th\u1ee9c li&ecirc;n h\u1ec7 gi\u1eefa t\u1ed1c \u0111\u1ed9 g&oacute;c <span class=\"math-tex\">$\\omega$<\/span>&nbsp;v\u1edbi t\u1ea7n&nbsp;s\u1ed1 <span class=\"math-tex\">$f$<\/span>&nbsp;l&agrave;&nbsp;<span class=\"math-tex\">$\\omega=2\\pi f$<\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-13 09:58:36","option_type":"math","len":0},{"id":"8293","mon_id":"1158790","chapter_id":"1159899","post_id":"8852","question":"<p>Chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a v\u1eadt n&agrave;o d\u01b0\u1edbi \u0111&acirc;y l&agrave;&nbsp;chuy\u1ec3n \u0111\u1ed9ng tr&ograve;n \u0111\u1ec1u?<br \/><br \/><br \/><br \/>&nbsp;<\/p>","options":["<strong>A. <\/strong>Chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a pitt&ocirc;ng trong \u0111\u1ed9ng c\u01a1 \u0111\u1ed1t trong.","<strong>B. <\/strong>Chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a m\u1ed9t m\u1eaft x&iacute;ch xe \u0111\u1ea1p.","<strong>C.<\/strong> Chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a con l\u1eafc \u0111\u1ed3ng h\u1ed3.","<strong>D.<\/strong> Chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a \u0111\u1ea7u kim ph&uacute;t."],"correct":"4","level":"2","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong> Chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a \u0111\u1ea7u kim ph&uacute;t.<\/span><\/p><p>Chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a \u0111\u1ea7u kim ph&uacute;t l&agrave; chuy\u1ec3n&nbsp;\u0111\u1ed9ng tr&ograve;n \u0111\u1ec1u.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-04-13 10:00:24","option_type":"txt","len":3}]}