{"common":{"save":0,"post_id":"6303","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5676","mon_id":"1158790","chapter_id":"1158795","post_id":"6303","question":"<p>M\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng v\u1eeba cho bi\u1ebft \u0111\u1ed9 l\u1edbn, v\u1eeba cho bi\u1ebft h\u01b0\u1edbng g\u1ecdi là…<\/p>","options":["A. vect\u01a1","B. m\u0169i tên","C. \u0111\u1ed9 dài ","D. \u0111\u1ed9 l\u1edbn"],"correct":"1","level":"2","hint":"<p>M\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng v\u1eeba cho bi\u1ebft \u0111\u1ed9 l\u1edbn, v\u1eeba cho bi\u1ebft h\u01b0\u1edbng g\u1ecdi là vect\u01a1.<\/p>","answer":"<p><span style=\"color:#27ae60;\"><strong>Ch\u1ecdn A.<br \/>M\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng v\u1eeba cho bi\u1ebft \u0111\u1ed9 l\u1edbn, v\u1eeba cho bi\u1ebft h\u01b0\u1edbng g\u1ecdi là vect\u01a1.<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-07 02:02:33","option_type":"txt","len":2},{"id":"5677","mon_id":"1158790","chapter_id":"1158795","post_id":"6303","question":"<p>\u0110\u1ed1i v\u1edbi m\u1ed9t v\u1eadt chuy\u1ec3n \u0111\u1ed9ng, \u0111\u1eb7c \u0111i\u1ec3m nào sau \u0111ây là \u0111\u1eb7c \u0111i\u1ec3m chung c\u1ee7a quãng \u0111\u01b0\u1eddng \u0111i \u0111\u01b0\u1ee3c và \u0111\u1ed9 d\u1ecbch chuy\u1ec3n?<\/p>","options":["A. Có h\u01b0\u1edbng xác \u0111\u1ecbnh ","B. Có th\u1ec3 có \u0111\u1ed9 l\u1edbn b\u1eb1ng 0","C. \u0110\u1ed9 l\u1edbn luôn khác 0","D. Có \u0111\u01a1n v\u1ecb \u0111\u1ed9 dài: cm, m, km…"],"correct":"4","level":"2","hint":"<p>Quãng \u0111\u01b0\u1eddng là \u0111\u1ea1i l\u01b0\u1ee3ng vô h\u01b0\u1edbng, cho bi\u1ebft \u0111\u1ed9 dài \u0111\u01b0\u1eddng \u0111i c\u1ee7a v\u1eadt<br \/>\u0110\u1ed9 d\u1ecbch chuy\u1ec3n c\u1ee7a m\u1ed9t v\u1eadt là m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng vect\u01a1, cho bi\u1ebft \u0111\u1ed9 dài và h\u01b0\u1edbng c\u1ee7a s\u1ef1 thay \u0111\u1ed5i v\u1ecb trí c\u1ee7a v\u1eadt.<\/p>","answer":"<p><span style=\"color:#27ae60;\"><\/span> <span style=\"color:#27ae60;\"><strong>Ch\u1ecdn D.<br \/>Quãng \u0111\u01b0\u1eddng là \u0111\u1ea1i l\u01b0\u1ee3ng vô h\u01b0\u1edbng, cho bi\u1ebft \u0111\u1ed9 dài \u0111\u01b0\u1eddng \u0111i c\u1ee7a v\u1eadt nên khi v\u1eadt chuy\u1ec3n \u0111\u1ed9ng, quãng \u0111\u01b0\u1eddng \u0111i \u0111\u01b0\u1ee3c s luôn l\u1edbn h\u01a1n 0.<br \/>\u0110\u1ed9 d\u1ecbch chuy\u1ec3n c\u1ee7a m\u1ed9t v\u1eadt là m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng vect\u01a1, cho bi\u1ebft \u0111\u1ed9 dài và h\u01b0\u1edbng c\u1ee7a s\u1ef1 thay \u0111\u1ed5i v\u1ecb trí c\u1ee7a v\u1eadt. Tr\u01b0\u1eddng h\u1ee3p v\u1eadt chuy\u1ec3n \u0111\u1ed9ng có v\u1ecb trí xu\u1ea5t phát và v\u1ecb trí k\u1ebft thúc trùng nhau thì \u0111\u1ed9 l\u1edbn c\u1ee7a \u0111\u1ed9 d\u1ecbch chuy\u1ec3n b\u1eb1ng 0.<br \/>=> \u0110\u1eb7c \u0111i\u1ec3m chung c\u1ee7a quãng \u0111\u01b0\u1eddng \u0111i \u0111\u01b0\u1ee3c và \u0111\u1ed9 d\u1ecbch chuy\u1ec3n là có \u0111\u01a1n v\u1ecb \u0111\u1ed9 dài: cm, m, km…<\/strong><\/span><span style=\"color:#27ae60;\"><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-07 02:03:42","option_type":"txt","len":3},{"id":"5678","mon_id":"1158790","chapter_id":"1158795","post_id":"6303","question":"<p>\u0110\u1ed9 d\u1ecbch chuy\u1ec3n và quãng \u0111\u01b0\u1eddng \u0111i \u0111\u01b0\u1ee3c c\u1ee7a v\u1eadt có \u0111\u1ed9 l\u1edbn b\u1eb1ng nhau khi v\u1eadt…<\/p>","options":["A. chuy\u1ec3n \u0111\u1ed9ng tròn ","B. chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng theo m\u1ed9t h\u01b0\u1edbng","C. chuy\u1ec3n \u0111\u1ed9ng trên m\u1ed9t \u0111\u01b0\u1eddng cong kín","D. chuy\u1ec3n \u0111\u1ed9ng trên m\u1ed9t \u0111\u01b0\u1eddng cong không kín"],"correct":"2","level":"2","hint":"<p>\u0110\u1ed9 d\u1ecbch chuy\u1ec3n và quãng \u0111\u01b0\u1eddng \u0111i \u0111\u01b0\u1ee3c c\u1ee7a v\u1eadt có \u0111\u1ed9 l\u1edbn b\u1eb1ng nhau khi v\u1eadt chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng theo m\u1ed9t h\u01b0\u1edbng.<\/p>","answer":"<p><span style=\"color:#27ae60;\"><strong>Ch\u1ecdn B.<br \/>\u0110\u1ed9 d\u1ecbch chuy\u1ec3n và quãng \u0111\u01b0\u1eddng \u0111i \u0111\u01b0\u1ee3c c\u1ee7a v\u1eadt có \u0111\u1ed9 l\u1edbn b\u1eb1ng nhau khi v\u1eadt chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng theo m\u1ed9t h\u01b0\u1edbng.<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-07 02:05:48","option_type":"txt","len":3}]}