{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":"C\u00f3 th\u1ec3 l\u00e0m t\u0103ng \u0111\u1ed9 nghi\u00eang c\u1ee7a m\u1eb7t ph\u1eb3ng nghi\u00eang b\u1eb1ng c\u00e1ch n\u00e0o sau \u0111\u00e2y ?","select":["A. Gi\u1ea3m chi\u1ec1u cao k\u00ea m\u1eb7t ph\u1eb3ng nghi\u00eang.","B. T\u0103ng chi\u1ec1u cao k\u00ea m\u1eb7t ph\u1eb3ng nghi\u00eang.","C. T\u0103ng chi\u1ec1u d\u00e0i m\u1eb7t ph\u1eb3ng nghi\u00eang.","D. T\u0103ng chi\u1ec1u d\u00e0i m\u1eb7t ph\u1eb3ng nghi\u00eang v\u00e0 \u0111\u1ed3ng th\u1eddi gi\u1ea3m chi\u1ec1u cao k\u00ea m\u1eb7t ph\u1eb3ng nghi\u00eang."],"hint":"","explain":"<span class='basic_left'>t\u0103ng \u0111\u1ed9 nghi\u00eang c\u1ee7a m\u1eb7t ph\u1eb3ng nghi\u00eang b\u1eb1ng c\u00e1ch t\u0103ng chi\u1ec1u cao k\u00ea m\u1eb7t ph\u1eb3ng nghi\u00eang.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2391},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":"M\u1ed9t ng\u01b0\u1eddi d\u00f9ng l\u1ef1c 400N \u0111\u1ec3 \u0111\u01b0a v\u1eadt n\u1eb7ng 1200N t\u1eeb m\u1eb7t \u0111\u1ea5t l\u00ean xe \u00f4 t\u00f4 b\u1eb1ng m\u1ed9t m\u1eb7t ph\u1eb3ng nghi\u00eang. N\u1ebfu s\u1eed d\u1ee5ng m\u1eb7t ph\u1eb3ng nghi\u00eang ng\u1eafn h\u01a1n th\u00ec ng\u01b0\u1eddi \u0111\u00f3 s\u1ebd d\u00f9ng l\u1ef1c n\u00e0o trong c\u00e1c l\u1ef1c n\u00e0o trong c\u00e1c l\u1ef1c sau \u0111\u00e2y ?","select":["A. F = 1200N","B. F > 400N","C. F = 400N","D. F < 400N"],"hint":"","explain":"<span class='basic_left'>V\u00ec \u0111\u1ed9 d\u00e0i m\u1eb7t ph\u1eb3ng nghi\u00eang nh\u1ecf \u0111i n\u00ean ph\u1ea3i d\u00f9ng l\u1ef1c l\u01a1n h\u01a1n 400N.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2392},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":10,"ques":"H\u00e3y so s\u00e1nh xem l\u1ef1c k\u00e9o v\u1eadt l\u00ean tr\u1ef1c ti\u1ebfp s\u1ebd nh\u01b0 th\u1ebf n\u00e0o so v\u1edbi l\u1ef1c k\u00e9o v\u1eadt l\u00ean khi d\u00f9ng r\u00f2ng r\u1ecdc c\u1ed1 \u0111\u1ecbnh.","select":["A. B\u1eb1ng","B. Nh\u1ecf h\u01a1n","C. \u00edt nh\u1ea5t b\u1eb1ng","D. L\u1edbn h\u01a1n"],"hint":"","explain":"<span class='basic_left'> l\u1ef1c k\u00e9o v\u1eadt l\u00ean tr\u1ef1c ti\u1ebfp s\u1ebd b\u1eb1ng v\u1edbi l\u1ef1c k\u00e9o v\u1eadt l\u00ean khi d\u00f9ng r\u00f2ng r\u1ecdc c\u1ed1 \u0111\u1ecbnh.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2393},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":"Trong c\u00e1c c\u00e2u sau, c\u00e2u n\u00e0o \u0111\u00fang nh\u1ea5t ?","select":["A. R\u00f2ng r\u1ecdc \u0111\u1ed9ng c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m thay \u0111\u1ed5i h\u01b0\u1edbng c\u1ee7a l\u1ef1c.","B. R\u00f2ng r\u1ecdc c\u1ed1 \u0111\u1ecbnh c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m thay \u0111\u1ed5i \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c.","C. R\u00f2ng r\u1ecdc c\u1ed1 \u0111\u1ecbnh c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m thay \u0111\u1ed5i c\u1ea3 h\u01b0\u1edbng v\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c.","D. R\u00f2ng r\u1ecdc \u0111\u1ed9ng c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m thay \u0111\u1ed5i c\u1ea3 h\u01b0\u1edbng v\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c."],"hint":"","explain":"<span class='basic_left'>R\u00f2ng r\u1ecdc \u0111\u1ed9ng c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m thay \u0111\u1ed5i c\u1ea3 h\u01b0\u1edbng v\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2394},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":10,"ques":"C\u1ea7u thang xo\u1eafn l\u00e0 m\u1ed9t v\u00ed d\u1ee5 v\u1ec1 m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n n\u00e0o ?","select":["A. R\u00f2ng r\u1ecdc \u0111\u1ed9ng.","B. \u0110\u00f2n b\u1ea9y.","C. M\u1eb7t ph\u1eb3ng nghi\u00eang.","D. R\u00f2ng r\u1ecdc c\u1ed1 \u0111\u1ecbnh."],"hint":"","explain":"<span class='basic_left'>C\u1ea7u thang xo\u1eafn l\u00e0 m\u1ed9t v\u00ed d\u1ee5 v\u1ec1 m\u1eb7t ph\u1eb3ng nghi\u00eang.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2395},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":"Tr\u01b0\u1eddng h\u1ee3p n\u00e0o sau \u0111\u00e2y kh\u00f4ng ph\u1ea3i m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n d\u00f9ng trong th\u1ef1c t\u1ebf?","select":["A. R\u00f2ng r\u1ecdc k\u00e9o c\u1edd l\u00ean \u1edf c\u1ed9t c\u1edd ","B. M\u1eb7t ph\u1eb3ng nghi\u00eang \u0111\u1ec3 xe l\u00ean th\u1ec1m nh\u00e0","C. X\u00e0 beng \u0111\u1ec3 nh\u1ed5 \u0111inh","D. M\u1ed9t h\u1ecdc sinh th\u1ea3 m\u1ed9t qu\u1ea3 b\u00f3ng t\u1eeb tr\u00ean cao xu\u1ed1ng v\u00e0 nh\u1eadn th\u1ea5y qu\u1ea3 b\u00f3ng c\u00e0ng r\u01a1i, c\u00e0ng chuy\u1ec3n \u0111\u1ed9ng nhanh l\u00ean"],"hint":"","explain":"<span class='basic_left'>M\u1ed9t h\u1ecdc sinh th\u1ea3 m\u1ed9t qu\u1ea3 b\u00f3ng t\u1eeb tr\u00ean cao xu\u1ed1ng v\u00e0 nh\u1eadn th\u1ea5y qu\u1ea3 b\u00f3ng c\u00e0ng r\u01a1i, c\u00e0ng chuy\u1ec3n \u0111\u1ed9ng nhanh l\u00ean l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng r\u01a1i t\u1ef1 do ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2396},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":"Khi \u0111\u01b0a m\u1ed9t v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 500kg l\u00ean theo ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng th\u00ec c\u1ea7n s\u1eed d\u1ee5ng m\u1ed9t l\u1ef1c b\u1eb1ng bao nhi\u00eau?","select":["A. nh\u1ecf h\u01a1n 500 N ","B. nh\u1ecf h\u01a1n 5000 N ","C. \u00edt nh\u1ea5t b\u1eb1ng 500 N ","D. \u00edt nh\u1ea5t b\u1eb1ng 5000 N"],"hint":"","explain":"<span class='basic_left'>Khi \u0111\u01b0a m\u1ed9t v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 500kg l\u00ean theo ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng th\u00ec c\u1ea7n s\u1eed d\u1ee5ng m\u1ed9t l\u1ef1c \u00edt nh\u1ea5t b\u1eb1ng tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a n\u00f3 khi kh\u00f4ng s\u1eed d\u1ee5ng m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n n\u00e0o. M\u00e0 v\u1eadt 500kg th\u00ec c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 5000N.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2397},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":10,"ques":"D\u1ee5ng c\u1ee5 n\u00e0o sau \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n?","select":["A. C\u00e1i b\u00faa nh\u1ed5 \u0111inh ","B. C\u00e1i b\u1ea5m m\u00f3ng tay ","C. C\u00e1i th\u01b0\u1edbc d\u00e2y ","D. C\u00e1i k\u00ecm"],"hint":"","explain":"<span class='basic_left'>C\u00e1i th\u01b0\u1edbc d\u00e2y kh\u00f4ng s\u1eed d\u1ee5ng nguy\u00ean l\u00fd c\u1ee7a m\u00e1y c\u01a1 \u0111\u01a1n gi\u1ea3n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2398},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":"Ng\u01b0\u1eddi ta th\u01b0\u1eddng s\u1eed d\u1ee5ng r\u00f2ng r\u1ecdc \u0111\u1ec3 l\u00e0m c\u00e1c vi\u1ec7c n\u00e0o sau \u0111\u00e2y?","select":["A. \u0110\u01b0a th\u00f9ng h\u00e0ng l\u00ean \u00f4t\u00f4 t\u1ea3i","B. \u0110\u01b0a x\u00f4 v\u1eefa l\u00ean cao","C. K\u00e9o th\u00f9ng n\u01b0\u1edbc t\u1eeb gi\u1ebfng l\u00ean","D. B v\u00e0 C \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>C\u1ea3 hai vi\u1ec7c \u0111\u00f3 \u0111\u1ec1u c\u1ea7n r\u00f2ng r\u1ecdc.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2399},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":"M\u1ed9t ng\u01b0\u1eddi th\u1ee3 x\u00e2y mu\u1ed1n d\u00f9ng l\u1ef1c kho\u1ea3ng 250N \u0111\u1ec3 k\u00e9o m\u1ed9t bao xi-m\u0103ng 50kg l\u00ean t\u1ea7ng th\u1ee9 10 c\u1ee7a t\u00f2a nh\u00e0 \u0111ang x\u00e2y; m\u1ed9t h\u1ecdc sinh mu\u1ed1n d\u00f9ng l\u1ef1c l\u1edbn h\u01a1n 100N \u0111\u1ec3 k\u00e9o m\u1ed9t g\u00e0u n\u01b0\u1edbc 10kg t\u1eeb d\u01b0\u1edbi gi\u1ebfng l\u00ean, mu\u1ed1n v\u1eady: ","select":["A. ng\u01b0\u1eddi th\u1ee3 x\u00e2y ph\u1ea3i d\u00f9ng r\u00f2ng r\u1ecdc, ng\u01b0\u1eddi h\u1ecdc sinh c\u0169ng ph\u1ea3i d\u00f9ng r\u00f2ng r\u1ecdc","B. ng\u01b0\u1eddi th\u1ee3 x\u00e2y ph\u1ea3i d\u00f9ng r\u00f2ng r\u1ecdc, ng\u01b0\u1eddi h\u1ecdc sinh ph\u1ea3i d\u00f9ng m\u1eb7t ph\u1eb3ng nghi\u00eang","C. ng\u01b0\u1eddi th\u1ee3 x\u00e2y ph\u1ea3i d\u00f9ng m\u1eb7t ph\u1eb3ng nghi\u00eang, ng\u01b0\u1eddi h\u1ecdc sinh c\u0169ng ph\u1ea3i d\u00f9ng m\u1eb7t ph\u1eb3ng nghi\u00eang","D. ng\u01b0\u1eddi th\u1ee3 x\u00e2y ph\u1ea3i d\u00f9ng r\u00f2ng r\u1ecdc, ng\u01b0\u1eddi h\u1ecdc sinh kh\u00f4ng ph\u1ea3i d\u00f9ng r\u00f2ng r\u1ecdc"],"hint":"","explain":"<span class='basic_left'>Ng\u01b0\u1eddi th\u1ee3 x\u00e2y k\u00e9o bao xi-m\u0103ng b\u1eb1ng 1 l\u1ef1c \u00edt h\u01a1n tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a n\u00f3 n\u00ean ph\u1ea3i d\u00f9ng r\u00f2ng r\u1ecdc.Ng\u01b0\u1eddi h\u1ecdc sinh k\u00e9o g\u00e0u n\u01b0\u1edbc b\u1eb1ng 1 l\u1ef1c l\u1edbn h\u01a1n tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a n\u00f3 n\u00ean kh\u00f4ng ph\u1ea3i d\u00f9ng r\u00f2ng r\u1ecdc.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2400}],"lesson":{"save":0,"level":2}}