Thực hành: Tổng hợp lực

Home Lớp 10 Vật lý 10 - Sách kết nối tri thức Bài 22. Thực hành: Tổng hợp lựcBài tập cơ bản

{"common":{"save":0,"post_id":"8521","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7864","mon_id":"1158790","chapter_id":"1158796","post_id":"8521","question":"Hai l\u1ef1c $\\overrightarrow{F_1}$<\/span> và $\\overrightarrow{F_2}$<\/span> cùng tác d\u1ee5ng lên m\u1ed9t v\u1eadt. Làm th\u1ebf nào \u0111\u1ec3 xác \u0111\u1ecbnh \u0111\u01b0\u1ee3c vect\u01a1 h\u1ee3p l\u1ef1c c\u1ee7a chúng?<\/p>","options":["A. <\/strong>S\u1eed d\u1ee5ng quy t\u1eafc hình bình hành.","B.<\/strong> S\u1eed d\u1ee5ng \u0111\u1ecbnh lý hàm sin.","C.<\/strong> S\u1eed d\u1ee5ng công th\u1ee9c hình h\u1ecdc.","D. <\/strong>S\u1eed d\u1ee5ng \u0111\u1ecbnh lý cosin."],"correct":"1","level":"1","hint":"","answer":"Ch\u1ecdn A. <\/strong>S\u1eed d\u1ee5ng quy t\u1eafc hình bình hành.<\/span><\/p>- \u0110\u1ec3 xác \u0111\u1ecbnh \u0111\u01b0\u1ee3c vect\u01a1 h\u1ee3p l\u1ef1c ta s\u1eed d\u1ee5ng quy t\u1eafc hình bình hành.<\/p>- \u0110\u1ec3 xác \u0111\u1ecbnh \u0111\u1ed9 l\u1edbn c\u1ee7a h\u1ee3p l\u1ef1c ta có th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ecbnh lí cosin ho\u1eb7c công th\u1ee9c hình h\u1ecdc d\u1ef1a trên hình v\u1ebd.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-03-11 08:44:54","option_type":"txt","len":3},{"id":"7866","mon_id":"1158790","chapter_id":"1158796","post_id":"8521","question":"Trong các phát bi\u1ec3u sau, phát bi\u1ec3u nào \u0111úng <\/strong>v\u1edbi n\u1ed9i dung quy t\u1eafc hình bình hành \u0111\u1ec3 t\u1ed5ng h\u1ee3p hai l\u1ef1c \u0111\u1ed3ng quy?<\/p>H\u1ee3p l\u1ef1c c\u1ee7a hai l\u1ef1c \u0111\u1ed3ng quy \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng <\/strong><\/span><\/p>","options":["A.<\/strong> m\u1ed9t c\u1ea1nh c\u1ee7a hình bình hành mà c\u1ea1nh còn l\u1ea1i và \u0111\u01b0\u1eddng chéo là nh\u1eefng vect\u01a1 bi\u1ec3u di\u1ec5n hai l\u1ef1c thành ph\u1ea7n.","B.<\/strong> \u0111\u01b0\u1eddng chéo c\u1ee7a hình bình hành.","C.<\/strong> b\u1ea5t kì c\u1ea1nh nào c\u1ee7a hình bình hành mà c\u1ea1nh còn l\u1ea1i và \u0111\u01b0\u1eddng chéo là nh\u1eefng vect\u01a1 bi\u1ec3u di\u1ec5n hai l\u1ef1c thành ph\u1ea7n.","D.<\/strong> \u0111\u01b0\u1eddng chéo c\u1ee7a hình bình hành mà hai c\u1ea1nh là nh\u1eefng vect\u01a1 bi\u1ec3u di\u1ec5n hai l\u1ef1c thành ph\u1ea7n."],"correct":"4","level":"1","hint":"","answer":"Ch\u1ecdn D.<\/strong> \u0111\u01b0\u1eddng chéo c\u1ee7a hình bình hành mà hai c\u1ea1nh là nh\u1eefng vect\u01a1 bi\u1ec3u di\u1ec5n hai l\u1ef1c thành ph\u1ea7n.<\/span><\/p>Quy t\u1eafc hình bình hành: H\u1ee3p l\u1ef1c c\u1ee7a hai l\u1ef1c \u0111\u1ed3ng quy \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng \u0111\u01b0\u1eddng chéo c\u1ee7a hình bình hành mà hai c\u1ea1nh là nh\u1eefng vect\u01a1 bi\u1ec3u di\u1ec5n hai l\u1ef1c thành ph\u1ea7n.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-03-11 08:49:05","option_type":"txt","len":3},{"id":"7870","mon_id":"1158790","chapter_id":"1158796","post_id":"8521","question":"Bi\u1ec3u th\u1ee9c nào d\u01b0\u1edbi \u0111ây có th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 tính \u0111\u1ed9 l\u1edbn c\u1ee7a h\u1ee3p l\u1ef1c F trong hình?<\/p><svg height=\"150\" width=\"270\"> <g><title><\/title><rect fill=\"#fff\" height=\"152\" id=\"canvas_background\" width=\"272\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_12\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><g id=\"svg_23\"> <path d=\"m10.76,121.71376l46.4,-92.00001l185.59999,0l-46.4,92.00001l-185.59999,0z\" fill=\"#fff\" id=\"svg_1\" stroke=\"#ff0000\" stroke-width=\"3\"><\/path> <text fill=\"#ff0000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_2\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(-64.54564666748047 55.01388549804687,34.58333206176757) \" x=\"48\" xml:space=\"preserve\" y=\"42.58333\">><\/text> <text fill=\"#ff0000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_3\" stroke=\"#000\" stroke-opacity=\"null\" 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xml:space=\"preserve\" y=\"120.58333\">><\/text> <g id=\"svg_17\"> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"24\" font-style=\"italic\" font-weight=\"bold\" id=\"svg_13\" stroke=\"#000000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"28\" xml:space=\"preserve\" y=\"31.58333\">F<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"17\" font-style=\"italic\" font-weight=\"bold\" id=\"svg_14\" stroke=\"#000000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"36\" xml:space=\"preserve\" y=\"42.58333\">1<\/text> <line fill=\"#000000\" fill-opacity=\"null\" id=\"svg_15\" stroke=\"#000000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-width=\"2\" x1=\"26\" x2=\"45\" y1=\"8.58333\" y2=\"9\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" 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<\/svg><\/span><\/p>","options":["A.<\/strong> $F^2=F_1^2+F_2^2-2F_1F_2\\cos(\\overrightarrow{F_1},\\overrightarrow{F_2})$<\/span>.","B.<\/strong> $F^2=F_1^2+F_2^2+2F_1F_2\\cos(\\overrightarrow{F_1},\\overrightarrow{F_2})$<\/span>.","C.<\/strong> $F^2=F_1^2-F_2^2-2F_1F_2\\cos(\\overrightarrow{F_1},\\overrightarrow{F_2})$<\/span>.","D.<\/strong> $F^2=F_1^2-F_2^2+2F_1F_2\\cos(\\overrightarrow{F_1},\\overrightarrow{F_2})$<\/span>."],"correct":"2","level":"1","hint":"","answer":"Ch\u1ecdn B.<\/strong> $F^2=F_1^2+F_2^2+2F_1F_2\\cos(\\overrightarrow{F_1},\\overrightarrow{F_2})$<\/span><\/span>.<\/span><\/p>Bi\u1ec3u th\u1ee9c c\u1ee7a \u0111\u1ecbnh lý cosin \u0111\u1ec3 tính \u0111\u1ed9 l\u1edbn c\u1ee7a h\u1ee3p l\u1ef1c: $F^2=F_1^2+F_2^2+2F_1F_2\\cos(\\overrightarrow{F_1},\\overrightarrow{F_2})$<\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-03-11 09:02:26","option_type":"math","len":0}]}