{"common":{"save":0,"post_id":"8647","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7954","mon_id":"1158790","chapter_id":"1159772","post_id":"8647","question":"<p>\u0110\u01a1n vi\u0323 n&agrave;o sau \u0111&acirc;y <strong>kh&ocirc;ng <\/strong>pha\u0309i l&agrave; \u0111\u01a1n vi\u0323&nbsp;cu\u0309a c&ocirc;ng su&acirc;\u0301t:<\/p>","options":["<strong>A.<\/strong> N.m\/s.","<strong>B.<\/strong> W.","<strong>C.<\/strong> J.s.","<strong>D.<\/strong> HP."],"correct":"3","level":"1","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong>&nbsp;J.s.<\/span><\/p><p>C&ocirc;ng su\u1ea5t c&oacute; \u0111\u1ed9 l\u1edbn \u0111\u01b0\u1ee3c x&aacute;c \u0111\u1ecbnh b\u1eb1ng&nbsp;c&ocirc;ng sinh ra trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian:&nbsp;<span class=\"math-tex\">$P=\\dfrac{A}{t}$<\/span>.<\/p><p>Trong h\u1ec7 SI, c&ocirc;ng su\u1ea5t \u0111o b\u1eb1ng o&aacute;t, k&iacute;&nbsp;hi\u1ec7u l&agrave; W.<\/p><p>1 W = 1 J\/s = 1 N.m\/s<\/p><p>M\u1ed9t s\u1ed1 \u0111\u01a1n v\u1ecb kh&aacute;c: 1KW = 1000 W;&nbsp;1MW = 1000 KW; 1HP (m&atilde; l\u1ef1c) &asymp; 745,7&nbsp;W.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-03-16 15:48:16","option_type":"txt","len":0},{"id":"7955","mon_id":"1158790","chapter_id":"1159772","post_id":"8647","question":"<p>C&ocirc;ng su\u1ea5t c&oacute; \u0111\u1ed9 l\u1edbn \u0111\u01b0\u1ee3c x&aacute;c \u0111\u1ecbnh&nbsp;b\u1eb1ng:<\/p>","options":["<strong>A.<\/strong> Gi&aacute; tr\u1ecb c&ocirc;ng c&oacute; kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n.","<strong>B.<\/strong> C&ocirc;ng th\u1ef1c hi\u1ec7n trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian.","<strong>C.<\/strong> C&ocirc;ng th\u1ef1c hi\u1ec7n tr&ecirc;n m\u1ed9t \u0111\u01a1n v\u1ecb \u0111\u1ed9 d&agrave;i.","<strong>D.<\/strong> T&iacute;ch c\u1ee7a c&ocirc;ng v&agrave; th\u1eddi gian th\u1ef1c hi\u1ec7n c&ocirc;ng."],"correct":"2","level":"1","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.<\/strong> C&ocirc;ng th\u1ef1c hi\u1ec7n trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi&nbsp;gian.<\/span><\/p><p>C&ocirc;ng su\u1ea5t \u0111\u1eb7c tr\u01b0ng cho kh\u1ea3 n\u0103ng th\u1ef1c&nbsp;hi\u1ec7n c&ocirc;ng nhanh hay ch\u1eadm.<\/p><p>C&ocirc;ng su\u1ea5t&nbsp;c&oacute; \u0111\u1ed9 l\u1edbn \u0111\u01b0\u1ee3c x&aacute;c \u0111\u1ecbnh b\u1eb1ng c&ocirc;ng sinh&nbsp;ra trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian:&nbsp;<span class=\"math-tex\">$P=\\dfrac{A}{t}$<\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-03-16 15:49:55","option_type":"txt","len":3},{"id":"7956","mon_id":"1158790","chapter_id":"1159772","post_id":"8647","question":"<p>M\u1ed9t l\u1ef1c <span class=\"math-tex\">$\\overrightarrow{F}$<\/span>&nbsp;kh&ocirc;ng \u0111\u1ed5i li&ecirc;n t\u1ee5c k&eacute;o 1 v\u1eadt&nbsp;chuy\u1ec3n \u0111\u1ed9ng v\u1edbi v\u1eadn t\u1ed1c <span class=\"math-tex\">$\\overrightarrow{v}$<\/span>&nbsp;theo h\u01b0\u1edbng&nbsp;c\u1ee7a l\u1ef1c <span class=\"math-tex\">$\\overrightarrow{F}$<\/span>. C&ocirc;ng su\u1ea5t c\u1ee7a l\u1ef1c <span class=\"math-tex\">$\\overrightarrow{F}$<\/span>&nbsp;l&agrave;:<\/p>","options":["<strong>A.<\/strong> F.v.","<strong>B.<\/strong> F.v&sup2;.","<strong>C.<\/strong> F.t.","<strong>D.<\/strong> F.v.t."],"correct":"1","level":"1","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong> F.v.<\/span><\/p><p>C&ocirc;ng su\u1ea5t:&nbsp;<span class=\"math-tex\">$P=\\overrightarrow{F}.\\overrightarrow{v}=F.v$<\/span>&nbsp;(&alpha; = 0&deg;).<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-03-16 15:54:12","option_type":"txt","len":1}]}