{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Trong c\u00e1c v\u1eadt sau \u0111\u00e2y, v\u1eadt n\u00e0o kh\u00f4ng c\u00f3 th\u1ebf n\u0103ng?","select":["A. Vi\u00ean \u0111\u1ea1n \u0111ang bay.","B. L\u00f2 xo \u0111\u1ec3 t\u1ef1 nhi\u00ean \u1edf m\u1ed9t \u0111\u1ed9 cao so v\u1edbi m\u1eb7t \u0111\u1ea5t.","C. H\u00f2n bi \u0111ang l\u0103n tr\u00ean m\u1eb7t \u0111\u1ea5t n\u1eb1m ngang.","D. L\u00f2 xo b\u1ecb \u00e9p \u0111\u1eb7t ngay tr\u00ean m\u1eb7t \u0111\u1ea5t."],"hint":"","explain":"<span class='basic_left'>Trong c\u00e1c v\u1eadt tr\u00ean \u0111\u00e2y, v\u1eadt kh\u00f4ng c\u00f3 th\u1ebf n\u0103ng: H\u00f2n bi \u0111ang l\u0103n tr\u00ean m\u1eb7t \u0111\u1ea5t n\u1eb1m ngang. V\u00ec l\u00fac n\u00e0y v\u1eadt ch\u1ec9 c\u00f3 \u0111\u1ed9ng n\u0103ng, th\u1ebf n\u0103ng b\u1eb1ng kh\u00f4ng v\u00ec v\u1eadt n\u1eb1m tr\u00ean m\u1eb7t \u0111\u1ea5t. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 c.<\/span><\/span> ","column":1}]}],"id_ques":2740},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang?","select":["A. \u0110\u1ed9ng n\u0103ng l\u00e0 c\u01a1 n\u0103ng c\u1ee7a v\u1eadt c\u00f3 \u0111\u01b0\u1ee3c do chuy\u1ec3n \u0111\u1ed9ng.","B. V\u1eadt c\u00f3 \u0111\u1ed9ng n\u0103ng c\u00f3 kh\u1ea3 n\u0103ng sinh c\u00f4ng.","C. \u0110\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt kh\u00f4ng thay \u0111\u1ed5i khi v\u1eadt chuy\u1ec3n \u0111\u1ed9ng \u0111\u1ec1u.","D. \u0110\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt ch\u1ec9 ph\u1ee5 thu\u1ed9c v\u00e0o v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt, kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt."],"hint":"","explain":"<span class='basic_left'>\u0110\u1ed9ng n\u0103ng l\u00e0 c\u01a1 n\u0103ng c\u1ee7a v\u1eadt c\u00f3 \u0111\u01b0\u1ee3c do chuy\u1ec3n \u0111\u1ed9ng.<br\/>V\u1eadt c\u00f3 \u0111\u1ed9ng n\u0103ng c\u00f3 kh\u1ea3 n\u0103ng sinh c\u00f4ng.<br\/>\u0110\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt kh\u00f4ng thay \u0111\u1ed5i khi v\u1eadt chuy\u1ec3n \u0111\u1ed9ng \u0111\u1ec1u.<br\/>\u0110\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt ph\u1ee5 thu\u1ed9c\u0111\u1ed3ng th\u1eddi v\u00e0o v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt, v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt.<br\/><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2741},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang?","select":["A. C\u01a1 n\u0103ng c\u1ee7a m\u1ed9t v\u1eadt ph\u1ee5 thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed c\u1ee7a v\u1eadt so v\u1edbi m\u1eb7t \u0111\u1ea5t g\u1ecdi l\u00e0 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.","B. M\u1ed9t v\u1eadt ch\u1ec9 c\u00f3 kh\u1ea3 n\u0103ng sinh c\u00f4ng khi c\u00f3 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.","C. M\u1ed9t v\u1eadt c\u00e0ng l\u00ean cao th\u00ec th\u1ebf n\u0103ng h\u1ea5p d\u1eabn c\u00e0ng l\u1edbn.","D. Th\u1ebf n\u0103ng h\u1ea5p d\u1eabn c\u1ee7a m\u1ed9t v\u1eadt ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed1c t\u00ednh \u0111\u1ed9 cao."],"hint":"","explain":"<span class='basic_left'>C\u01a1 n\u0103ng c\u1ee7a m\u1ed9t v\u1eadt ph\u1ee5 thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed c\u1ee7a v\u1eadt so v\u1edbi m\u1eb7t \u0111\u1ea5t g\u1ecdi l\u00e0 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.<br\/>M\u1ed9t v\u1eadt kh\u1ea3 n\u0103ng sinh c\u00f4ng kh\u00f4ng ch\u1ec9 khi c\u00f3 th\u1ebf n\u0103ng h\u1ea5p d\u1eabnM\u1ed9t v\u1eadt c\u00e0ng l\u00ean cao th\u00ec th\u1ebf n\u0103ng h\u1ea5p d\u1eabn c\u00e0ng l\u1edbn.<br\/>Th\u1ebf n\u0103ng h\u1ea5p d\u1eabn c\u1ee7a m\u1ed9t v\u1eadt ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed1c t\u00ednh \u0111\u1ed9 cao.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2742},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"M\u1ed9t v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng m \u0111\u01b0\u1ee3c n\u00e2ng l\u00ean \u0111\u1ed9 cao h r\u1ed3i th\u1ea3 r\u01a1i. T\u00ednh c\u00f4ng c\u1ee7a v\u1eadt th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c cho \u0111\u1ebfn khi ch\u1ea1m m\u1eb7t \u0111\u1ea5t?","select":["A. 10mh.","B. 5mh.","C. 20mh.","D. 2mh."],"hint":"","explain":"<span class='basic_left'>C\u00f4ng c\u1ee7a v\u1eadt th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c cho \u0111\u1ebfn khi ch\u1ea1m m\u1eb7t \u0111\u1ea5t: A= mgh= 10mh.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2743},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"\u0110\u1ed9ng n\u0103ng ph\u1ee5 thu\u1ed9c y\u1ebfu t\u1ed1 g\u00ec v\u00e0 ph\u1ee5 thu\u1ed9c th\u1ebf n\u00e0o?","select":["A. \u0110\u1ed9ng n\u0103ng kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u1eadn t\u1ed1c v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a n\u00f3.","B. \u0110\u1ed9ng n\u0103ng ph\u1ee5 thu\u1ed9c kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a n\u00f3.","C. \u0110\u1ed9ng n\u0103ng ph\u1ee5 thu\u1ed9c v\u1eadn t\u1ed1c v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a n\u00f3.","D. \u0110\u1ed9ng n\u0103ng ph\u1ee5 thu\u1ed9c v\u1eadn t\u1ed1c c\u1ee7a n\u00f3."],"hint":"","explain":"<span class='basic_left'>\u0110\u1ed9ng n\u0103ng ph\u1ee5 thu\u1ed9c v\u1eadn t\u1ed1c v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a n\u00f3.<br\/>V\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng c\u00e0ng l\u1edbn v\u00e0 chuy\u1ec3n \u0111\u1ed9ng c\u00e0ng nhanh th\u00ec \u0111\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt c\u00e0ng l\u1edbn.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2744},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"M\u0169i t\u00ean \u0111\u01b0\u1ee3c b\u1eafn \u0111i t\u1eeb c\u00e1i cung l\u00e0 nh\u1edd n\u0103ng l\u01b0\u1ee3ng c\u1ee7a:","select":["A. M\u0169i t\u00ean.","B. C\u00e1nh cung.","C. Tay ng\u01b0\u1eddi.","D. T\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111\u00fang."],"hint":"","explain":"<span class='basic_left'>M\u0169i t\u00ean \u0111\u01b0\u1ee3c b\u1eafn \u0111i t\u1eeb c\u00e1i cung l\u00e0 nh\u1edd n\u0103ng l\u01b0\u1ee3ng c\u1ee7a c\u00e1nh cung. \u0110\u00f3 l\u00e0 th\u1ebf n\u0103ng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2745},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"M\u1ed9t v\u1eadt n\u1eb7ng \u0111\u01b0\u1ee3c m\u00f3c v\u00e0o m\u1ed9t \u0111\u1ea7u l\u00f2 xo treo c\u00e1ch m\u1eb7t \u0111\u1ea5t m\u1ed9t kho\u1ea3ng nh\u1ea5t \u0111\u1ecbnh. Khi v\u1eadt \u1edf tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng h\u1ec7 v\u1eadt v\u00e0 l\u00f2 xo c\u00f3 d\u1ea1ng c\u01a1 n\u0103ng n\u00e0o? ","select":["A. \u0110\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.","B. Ch\u1ec9 c\u00f3 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.","C. Ch\u1ec9 c\u00f3 th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i.","D. C\u00f3 c\u1ea3 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn v\u00e0 th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i."],"hint":"","explain":"<span class='basic_left'>Khi v\u1eadt \u1edf tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng h\u1ec7 v\u1eadt v\u00e0 l\u00f2 xo c\u00f3 d\u1ea1ng c\u01a1 n\u0103ng bao g\u1ed3m c\u1ea3 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn v\u00e0 th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2746},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai16/lv2/img\/h8.jpg'\/><\/center>B\u1ecf qua s\u1ee9c c\u1ea3n c\u1ee7a kh\u00f4ng kh\u00ed. T\u1ea1i v\u1ecb tr\u00ed n\u00e0o v\u1eadt kh\u00f4ng c\u00f3 th\u1ebf n\u0103ng? M\u1ed9t v\u1eadt \u0111\u01b0\u1ee3c n\u00e9m l\u00ean theo ph\u01b0\u01a1ng xi\u00ean g\u00f3c v\u1edbi ph\u01b0\u01a1ng n\u1eb1m ngang t\u1eeb v\u1ecb tr\u00ed A, r\u01a1i xu\u1ed1ng m\u1eb7t \u0111\u1ea5t t\u1ea1i v\u1ecb tr\u00ed D. ","select":["A. V\u1ecb tr\u00ed A.","B. V\u1ecb tr\u00ed B.","C. V\u1ecb tr\u00ed C.","D. V\u1ecb tr\u00ed D."],"hint":"","explain":"<span class='basic_left'>T\u1ea1i v\u1ecb tr\u00ed D, v\u1eadt n\u1eb1m tr\u00ean m\u1eb7t \u0111\u1ea5t n\u00ean v\u1eadt kh\u00f4ng c\u00f3 th\u1ebf n\u0103ng. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2747},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"B\u00faa \u0111\u1eadp v\u00e0o \u0111inh l\u00e0m \u0111inh ng\u1eadp s\u00e2u v\u00e0o g\u1ed7. \u0110inh ng\u1eadp s\u00e2u v\u00e0o g\u1ed7 l\u00e0 nh\u1edd n\u0103ng l\u01b0\u1ee3ng n\u00e0o ?","select":["A. N\u0103ng l\u01b0\u1ee3ng c\u1ee7a \u0111inh.","B. N\u0103ng l\u01b0\u1ee3ng c\u1ee7a b\u00faa.","C. N\u0103ng l\u01b0\u1ee3ng c\u1ee7a mi\u1ebfng g\u1ed7.","D. T\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111\u00fang."],"hint":"","explain":"<span class='basic_left'>B\u00faa \u0111\u1eadp v\u00e0o \u0111inh l\u00e0m \u0111inh ng\u1eadp s\u00e2u v\u00e0o g\u1ed7. \u0110inh ng\u1eadp s\u00e2u v\u00e0o g\u1ed7 l\u00e0 nh\u1edd n\u0103ng l\u01b0\u1ee3ng c\u1ee7a b\u00faa. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2748},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai16/lv2/img\/h10.jpg'\/><\/center>Th\u1ea3 vi\u00ean bi l\u0103n tr\u00ean m\u1ed9t c\u00e1i m\u00e1ng c\u00f3 h\u00ecnh v\u00f2ng cung . \u1ede v\u1ecb tr\u00ed n\u00e0o vi\u00ean bi c\u00f3 \u0111\u1ed9ng n\u0103ng l\u1edbn nh\u1ea5t ? ","select":["A. V\u1ecb tr\u00ed C.","B. V\u1ecb tr\u00ed A.","C. V\u1ecb tr\u00ed B.","D. Ngo\u00e0i ba v\u1ecb tr\u00ed tr\u00ean."],"hint":"","explain":"<span class='basic_left'>\u1ede v\u1ecb tr\u00ed B v\u1eadt \u1edf v\u1ecb tr\u00ed th\u1ea5p nh\u1ea5t n\u00ean \u0111\u1ed9ng n\u0103ng l\u1edbn nh\u1ea5t. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2749},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai16/lv2/img\/h11.jpg'\/><\/center>Th\u1ea3 vi\u00ean bi l\u0103n tr\u00ean m\u1ed9t c\u00e1i m\u00e1ng c\u00f3 h\u00ecnh v\u00f2ng cung. \u1ede v\u1ecb tr\u00ed n\u00e0o vi\u00ean bi c\u00f3 th\u1ebf n\u0103ng nh\u1ecf nh\u1ea5t? ","select":["A. V\u1ecb tr\u00ed C.","B. V\u1ecb tr\u00ed A.","C. V\u1ecb tr\u00ed B.","D. Ngo\u00e0i ba v\u1ecb tr\u00ed tr\u00ean."],"hint":"","explain":"<span class='basic_left'>\u1ede v\u1ecb tr\u00ed B v\u1eadt \u1edf v\u1ecb tr\u00ed th\u1ea5p nh\u1ea5t n\u00ean th\u1ebf n\u0103ng nh\u1ecf nh\u1ea5t. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2750},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai16/lv2/img\/h12.jpg'\/><\/center>M\u1ed9t con l\u1eafc \u0111ang dao \u0111\u1ed9ng t\u1eeb v\u1ecb tr\u00ed A sang v\u1ecb tr\u00ed C v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. N\u1ebfu l\u1ea5y m\u1ed1c t\u00ednh \u0111\u1ed9 cao l\u00e0 m\u1eb7t \u0111\u1ea5t v\u00e0 b\u1ecf qua ma s\u00e1t v\u1edbi kh\u00f4ng kh\u00ed thi t\u1ea1i \u0111i\u1ec3m A v\u00e0 \u0111i\u1ec3m C, con l\u1eafc :","select":["A. C\u00f3 c\u01a1 n\u0103ng b\u1eb1ng kh\u00f4ng.","B. Ch\u1ec9 c\u00f3 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.","C. Ch\u1ec9 c\u00f3 \u0111\u1ed9ng n\u0103ng.","D. C\u00f3 c\u1ea3 \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn."],"hint":"","explain":"<span class='basic_left'>T\u1ea1i \u0111i\u1ec3m A v\u00e0 \u0111i\u1ec3m C ch\u1ec9 c\u00f3 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn do khi \u0111\u00f3 v\u1eadt \u1edf v\u1ecb tr\u00ed cao nh\u1ea5t n\u00ean \u0111\u1ed9ng n\u0103ng b\u1eb1ng kh\u00f4ng. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2751},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai16/lv2/img\/h13.jpg'\/><\/center>K\u00e9o con l\u1eafc l\u1ec7ch kh\u1ecfi v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng \u0111\u1ec3 qu\u1ea3 c\u1ea7u c\u1ee7a con l\u1eafc \u1edf v\u1ecb tr\u00ed A r\u1ed3i bu\u00f4ng tay cho con l\u1eafc dao \u0111\u1ed9ng. B\u1ecf qua ma s\u00e1t c\u1ee7a kh\u00f4ng kh\u00ed. Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang? ","select":["A. Con l\u1eafc chuy\u1ec3n \u0111\u1ed9ng t\u1eeb A v\u1ec1 \u0111\u1ebfn v\u1ecb tr\u00ed c \u0111\u1ed9ng n\u0103ng t\u0103ng d\u1ea7n, th\u1ebf n\u0103ng gi\u1ea3m d\u1ea7n.","B. Con l\u1eafc chuy\u1ec3n \u0111\u1ed9ng t\u1eeb c \u0111\u1ebfn B, th\u1ebf n\u0103ng t\u0103ng d\u1ea7n, \u0111\u1ed9ng n\u0103ng gi\u1ea3m d\u1ea7n.","C. C\u01a1 n\u0103ng c\u1ee7a con l\u1eafc \u1edf v\u1ecb tr\u00ed C nh\u1ecf h\u01a1n \u1edf v\u1ecb tr\u00ed A.","D. Th\u1ebf n\u0103ng c\u1ee7a con l\u1eafc \u1edf v\u1ecb tr\u00ed A b\u1eb1ng \u1edf v\u1ecb tr\u00ed B."],"hint":"","explain":"<span class='basic_left'>\u1ede m\u1ecdi v\u1ecb tr\u00ed, co n\u0103ng c\u1ee7a con l\u1eafc \u0111\u1ec1u nh\u01b0 nhau. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2752},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/vatly/bai16/lv2/img\/h14.jpg'\/><\/center>T\u1eeb \u0111i\u1ec3m A, m\u1ed9t v\u1eadt \u0111\u01b0\u1ee3c n\u00e9m l\u00ean theo ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng. V\u1eadt l\u00ean \u0111\u1ebfn v\u1ecb tr\u00ed cao nh\u1ea5t B r\u1ed3i r\u01a1i xu\u1ed1ng \u0111\u1ebfn \u0111i\u1ec3m C tr\u00ean m\u1eb7t \u0111\u1ea5t. G\u1ecdi D l\u00e0 \u0111i\u1ec3m b\u1ea5t k\u00ec tr\u00ean \u0111o\u1ea1n AB. Ph\u00e1t bi\u1ec3u n\u00e0o d\u01b0\u1edbi \u0111\u00e2y \u0111\u00fang? ","select":["A. \u0110\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt t\u1ea1i A l\u1edbn nh\u1ea5t.","B. \u0110\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt t\u1ea1i A b\u1eb1ng th\u1ebf n\u0103ng c\u1ee7a v\u1eadt t\u1ea1i B.","C. \u0110\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt \u1edf t\u1ea1i C l\u00e0 l\u1edbn nh\u1ea5t.","D. C\u01a1 n\u0103ng c\u1ee7a v\u1eadt t\u1ea1i A nh\u1ecf h\u01a1n t\u1ea1i C."],"hint":"","explain":"<span class='basic_left'>V\u00ec \u1edf C v\u1eadt c\u00f3 \u0111\u1ed9 cao l\u00e0 th\u1ea5p nh\u1ea5t so v\u1edbi nh\u1eefng v\u1ecb tr\u00ed c\u00f2n l\u1ea1i n\u00ean v\u1eadt c\u00f3 v\u1eadn t\u1ed1c l\u1edbn nh\u1ea5t.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2753},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"\u0110\u01b0a m\u1ed9t v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng m l\u00ean \u0111\u1ed9 cao 20m. \u1ede \u0111\u1ed9 cao n\u00e0y v\u1eadt c\u00f3 th\u1ebf n\u0103ng 600J .X\u00e1c \u0111\u1ecbnh tr\u1ecdng l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt? ","select":["A. 10N.","B. 20N.","C. 30N.","D. 40N."],"hint":"","explain":"<span class='basic_left'>Tr\u1ecdng l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt:<br\/>$P=\\dfrac{A}{h}=\\dfrac{600}{20}=30N$<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2754},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"\u0110i\u1ec1u n\u00e0o sau \u0111\u00e2y \u0111\u00fang khi n\u00f3i v\u1ec1 c\u01a1 n\u0103ng ? ","select":["A. C\u01a1 n\u0103ng ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 bi\u1ebfn d\u1ea1ng c\u1ee7a v\u1eadt g\u1ecdi l\u00e0 th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i.","B. C\u01a1 n\u0103ng ph\u1ee5 thu\u1ed9c v\u1ecb tr\u00ed c\u1ee7a v\u1eadt so v\u1edbi m\u1eb7t \u0111\u1ea5t g\u1ecdi l\u00e0 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.","C. C\u01a1 n\u0103ng c\u1ee7a v\u1eadt do chuy\u1ec3n \u0111\u1ed9ng g\u1ecdi l\u00e0 \u0111\u1ed9ng n\u0103ng.","D. C\u1ea3 A,B,C."],"hint":"","explain":"<span class='basic_left'>C\u01a1 n\u0103ng ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 bi\u1ebfn d\u1ea1ng c\u1ee7a v\u1eadt g\u1ecdi l\u00e0 th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i.<br\/>C\u01a1 n\u0103ng ph\u1ee5 thu\u1ed9c v\u1ecb tr\u00ed c\u1ee7a v\u1eadt so v\u1edbi m\u1eb7t \u0111\u1ea5t g\u1ecdi l\u00e0 th\u1ebf n\u0103ng h\u1ea5p d\u1eabn.<br\/>C\u01a1 n\u0103ng c\u1ee7a v\u1eadt do chuy\u1ec3n \u0111\u1ed9ng g\u1ecdi l\u00e0 \u0111\u1ed9ng n\u0103ng. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2755},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Trong c\u00e1c v\u1eadt sau, v\u1eadt n\u00e0o kh\u00f4ng c\u00f3 \u0111\u1ed9ng n\u0103ng? ","select":["A. H\u00f2n bi n\u1eb1m y\u00ean tr\u00ean m\u1eb7t s\u00e0n.","B. H\u00f2n bi l\u0103n tr\u00ean s\u00e0n nh\u00e0.","C. M\u00e1y bay \u0111ang bay.","D. Vi\u00ean \u0111\u1ea1n \u0111ang bay."],"hint":"","explain":"<span class='basic_left'>V\u00ec h\u00f2n bi \u0111ang \u0111\u1ee9ng y\u00ean n\u00ean n\u00f3 kh\u00f4ng c\u00f3 \u0111\u1ed9ng n\u0103ng. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2756},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Th\u1ebf n\u0103ng h\u1ea5p d\u1eabn ph\u1ee5 thu\u1ed9c v\u00e0o nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0o ? ","select":["A. Kh\u1ed1i l\u01b0\u1ee3ng.","B. Tr\u1ecdng l\u01b0\u1ee3ng ri\u00eang.","C. Kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 v\u1ecb tr\u00ed c\u1ee7a v\u1eadt so v\u1edbi m\u1eb7t \u0111\u1ea5t.","D. Kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt."],"hint":"","explain":"<span class='basic_left'>Th\u1ebf n\u0103ng h\u1ea5p d\u1eabn ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 v\u1ecb tr\u00ed c\u1ee7a v\u1eadt so v\u1edbi m\u1eb7t \u0111\u1ea5t.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2757},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i ph\u1ee5 thu\u1ed9c v\u00e0o nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0o ? ","select":["A. Kh\u1ed1i l\u01b0\u1ee3ng.","B. \u0110\u1ed9 bi\u1ebfn d\u1ea1ng c\u1ee7a v\u1eadt \u0111\u00e0n h\u1ed3i.","C. Kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 ch\u1ea5t l\u00e0m v\u1eadt.","D. V\u1eadn t\u1ed1c c\u1ee7a v\u1eadt."],"hint":"","explain":"<span class='basic_left'>Th\u1ebf n\u0103ng \u0111\u00e0n h\u1ed3i ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 bi\u1ebfn d\u1ea1ng c\u1ee7a v\u1eadt \u0111\u00e0n h\u1ed3i.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2758},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p sau, tr\u01b0\u1eddng h\u1ee3p n\u00e0o v\u1eadt c\u00f3 c\u1ea3 \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng? ","select":["A. M\u1ed9t m\u00e1y bay \u0111ang chuy\u1ec3n \u0111\u1ed9ng tr\u00ean \u0111\u01b0\u1eddng b\u0103ng c\u1ee7a s\u00e2n bay.","B. M\u1ed9t \u00f4 t\u00f4 \u0111ang \u0111\u1ed7 trong b\u1ebfn xe.","C. M\u1ed9t m\u00e1y bay \u0111ang bay tr\u00ean cao.","D. M\u1ed9t \u00f4 t\u00f4 \u0111ang chuy\u1ec3n \u0111\u1ed9ng tr\u00ean \u0111\u01b0\u1eddng."],"hint":"","explain":"<span class='basic_left'>M\u1ed9t m\u00e1y bay \u0111ang bay tr\u00ean cao v\u1eeba \u0111ang chuy\u1ec3n \u0111\u00f4ng v\u1eeba c\u00f3 \u0111\u1ed9 cao so v\u1edbi m\u1eb7t \u0111\u1ea5t n\u00ean n\u00f3 c\u00f3 c\u1ea3 \u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2759}],"lesson":{"save":0,"level":2}}