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Home Lớp 7 Khoa học tự nhiên 7 - Sách kết nối tri thức Bài 8: Tốc độ chuyển độngBài tập cơ bản

{"common":{"save":0,"post_id":"5994","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"9356","post_id":"5994","mon_id":"1158739","chapter_id":"1158740","question":"Công th\u1ee9c tính t\u1ed1c \u0111\u1ed9 nào sau \u0111ây là \u0111úng?  <\/p>","options":["A. $s = \\frac{v}{t}$<\/span>.","B. $t = \\frac{v}{s}$<\/span>. \n ","C. $v = \\frac{s}{t}$<\/span>.","D. $v = s.t.$<\/span>"],"correct":"3","level":"1","hint":"T\u1ed1c \u0111\u1ed9 là quãng \u0111\u01b0\u1eddng ch\u1ea1y \u0111\u01b0\u1ee3c trong m\u1ed9t giây.  <\/p>","answer":"Công th\u1ee9c tính t\u1ed1c \u0111\u1ed9:  $v = \\frac{s}{t}$<\/span> Trong \u0111ó: + v là v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt (m\/s). + s là quãng \u0111\u01b0\u1eddng v\u1eadt \u0111i \u0111\u01b0\u1ee3c (m). + t là th\u1eddi gian v\u1eadt chuy\u1ec3n \u0111\u1ed9ng (s).<\/p>\u0110áp án \u0111úng:  C.  $v = \\frac{s}{t}$<\/span>.<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-08-20 03:58:37","option_type":"math","len":0},{"id":"9358","post_id":"5994","mon_id":"1158739","chapter_id":"1158740","question":"Trong th\u01b0\u0323c tê\u0301, tô\u0301c \u0111ô\u0323 chuyê\u0309n \u0111ô\u0323ng cu\u0309a mô\u0323t vâ\u0323t th\u01b0\u01a1\u0300ng thay \u0111ô\u0309i nên \u0111a\u0323i l\u01b0\u01a1\u0323ng $v = \\frac{s}{t}$<\/span> co\u0300n \u0111\u01b0\u01a1\u0323c go\u0323i mô\u0323t ca\u0301ch \u0111â\u0300y \u0111u\u0309 la\u0300<\/p>","options":["A. tô\u0301c \u0111ô\u0323 t\u01b0\u0301c th\u01a1\u0300i cu\u0309a chuyê\u0309n \u0111ô\u0323ng.","B. vâ\u0323n tô\u0301c t\u01b0\u0301c th\u01a1\u0300i cu\u0309a chuyê\u0309n \u0111ô\u0323ng.","C. tô\u0301c \u0111ô\u0323 trung bi\u0300nh cu\u0309a chuyê\u0309n \u0111ô\u0323ng.","D. Ca\u0309 A va\u0300 C \u0111ê\u0300u \u0111u\u0301ng."],"correct":"3","level":"1","hint":"","answer":"L\u1eddi gi\u1ea3i: Trong th\u01b0\u0323c tê\u0301, tô\u0301c \u0111ô\u0323 chuyê\u0309n \u0111ô\u0323ng cu\u0309a mô\u0323t vâ\u0323t th\u01b0\u01a1\u0300ng thay \u0111ô\u0309i nên \u0111a\u0323i l\u01b0\u01a1\u0323ng $v = \\frac{s}{t}$<\/span>  co\u0300n \u0111\u01b0\u01a1\u0323c go\u0323i mô\u0323t ca\u0301ch \u0111â\u0300y \u0111u\u0309 la\u0300 tô\u0301c \u0111ô\u0323 trung bi\u0300nh cu\u0309a chuyê\u0309n \u0111ô\u0323ng. \u0110áp án \u0111úng: C. tô\u0301c \u0111ô\u0323 trung bi\u0300nh cu\u0309a chuyê\u0309n \u0111ô\u0323ng.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-08-20 04:03:23","option_type":"txt","len":3},{"id":"9359","post_id":"5994","mon_id":"1158739","chapter_id":"1158740","question":"\u0110\u01a1n v\u1ecb nào sau \u0111ây là \u0111\u01a1n v\u1ecb \u0111o t\u1ed1c \u0111\u1ed9? <\/p>","options":["A. km","B. kg.","C. m\/s","D. m.s"],"correct":"3","level":"1","hint":"S\u1eed d\u1ee5ng công th\u1ee9c $v = \\frac{s}{t}$<\/span>.<\/p>","answer":"\u0110\u01a1n v\u1ecb \u0111o t\u1ed1c \u0111\u1ed9 ph\u1ee5 thu\u1ed9c vào \u0111\u01a1n v\u1ecb \u0111o quãng \u0111\u01b0\u1eddng và \u0111\u01a1n v\u1ecb \u0111o th\u1eddi gian. \u0110áp án \u0111úng:  C. m\/s.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"147","test":"0","date":"2022-08-20 04:06:15","option_type":"txt","len":0}]}