{"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 nào sau \u0111ây <strong>không <\/strong>pha\u0309i là \u0111\u01a1n vi\u0323 cu\u0309a công suâ\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 <span style=\"color:#16a085;\"><strong>C.<\/strong> J.s.<\/span><\/p><p>Công su\u1ea5t có \u0111\u1ed9 l\u1edbn \u0111\u01b0\u1ee3c xác \u0111\u1ecbnh b\u1eb1ng công sinh ra trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian: <span class=\"math-tex\">$P=\\dfrac{A}{t}$<\/span>.<\/p><p>Trong h\u1ec7 SI, công su\u1ea5t \u0111o b\u1eb1ng oát, kí hi\u1ec7u là W.<\/p><p>1 W = 1 J\/s = 1 N.m\/s<\/p><p>M\u1ed9t s\u1ed1 \u0111\u01a1n v\u1ecb khác: 1KW = 1000 W; 1MW = 1000 KW; 1HP (mã l\u1ef1c) ≈ 745,7 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>Công su\u1ea5t có \u0111\u1ed9 l\u1edbn \u0111\u01b0\u1ee3c xác \u0111\u1ecbnh b\u1eb1ng:<\/p>","options":["<strong>A.<\/strong> Giá tr\u1ecb công có kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n.","<strong>B.<\/strong> Công th\u1ef1c hi\u1ec7n trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian.","<strong>C.<\/strong> Công th\u1ef1c hi\u1ec7n trên m\u1ed9t \u0111\u01a1n v\u1ecb \u0111\u1ed9 dài.","<strong>D.<\/strong> Tích c\u1ee7a công và th\u1eddi gian th\u1ef1c hi\u1ec7n công."],"correct":"2","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> Công th\u1ef1c hi\u1ec7n trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian.<\/span><\/p><p>Công su\u1ea5t \u0111\u1eb7c tr\u01b0ng cho kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n công nhanh hay ch\u1eadm.<\/p><p>Công su\u1ea5t có \u0111\u1ed9 l\u1edbn \u0111\u01b0\u1ee3c xác \u0111\u1ecbnh b\u1eb1ng công sinh ra trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian: <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> không \u0111\u1ed5i liên t\u1ee5c kéo 1 v\u1eadt chuy\u1ec3n \u0111\u1ed9ng v\u1edbi v\u1eadn t\u1ed1c <span class=\"math-tex\">$\\overrightarrow{v}$<\/span> theo h\u01b0\u1edbng c\u1ee7a l\u1ef1c <span class=\"math-tex\">$\\overrightarrow{F}$<\/span>. Công su\u1ea5t c\u1ee7a l\u1ef1c <span class=\"math-tex\">$\\overrightarrow{F}$<\/span> là:<\/p>","options":["<strong>A.<\/strong> F.v.","<strong>B.<\/strong> F.v².","<strong>C.<\/strong> F.t.","<strong>D.<\/strong> F.v.t."],"correct":"1","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> F.v.<\/span><\/p><p>Công su\u1ea5t: <span class=\"math-tex\">$P=\\overrightarrow{F}.\\overrightarrow{v}=F.v$<\/span> (α = 0°).<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-03-16 15:54:12","option_type":"txt","len":1}]}
