Chuyển động biến đổi. Gia tốc

Home Lớp 10 Vật lý 10 - Sách kết nối tri thức Bài 8: Chuyển động biến đổi. Gia tốcBài tập nâng cao

{"common":{"save":0,"post_id":"6342","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5866","mon_id":"1158790","chapter_id":"1158795","post_id":"6342","question":"M\u1ed9t v\u1eadt chuy\u1ec3n \u0111\u1ed9ng trên \u0111\u01b0\u1eddng th\u1eb3ng v\u1edbi gia t\u1ed1c a = 3 $ m\/s^2$<\/span>. Thông s\u1ed1 này có ý ngh\u0129a gì?<\/p>","options":["A. trong 1 s, \u0111\u1ed9 l\u1edbn v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt thay \u0111\u1ed5i 3 m\/s","B. trong 1 s, \u0111\u1ed9 l\u1edbn v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt thay \u0111\u1ed5i 3 $ m\/s^2$<\/span>","C. trong 1 s, \u0111\u1ed9 l\u1edbn v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt gi\u1ea3m 3 m\/s","D. trong 1 s, \u0111\u1ed9 l\u1edbn v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt t\u0103ng 3 m\/s"],"correct":"1","level":"3","hint":"Gia t\u1ed1c c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng là \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng cho s\u1ef1 thay \u0111\u1ed5i c\u1ee7a v\u1eadn t\u1ed1c trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian.<\/p>","answer":"Ch\u1ecdn A.<\/strong><\/span> Gia t\u1ed1c a = 3 $ m\/s^2$<\/span>, ngh\u0129a là trong 1 s, \u0111\u1ed9 l\u1edbn v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt thay \u0111\u1ed5i 3 m\/s.<\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-25 09:09:38","option_type":"math","len":0},{"id":"5867","mon_id":"1158790","chapter_id":"1158795","post_id":"6342","question":"M\u1ed9t v\u1eadt \u0111ang chuy\u1ec3n \u0111\u1ed9ng, c\u1ee9 trung bình 1 s thì v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt t\u0103ng 3,6 m\/s. Tìm gia t\u1ed1c c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng?<\/p>","options":["A. 3,6 $m\/s^2$<\/span>","B. 0,4 $m\/s^2$<\/span>","C. 1,25 $m\/s^2$<\/span>","D. 2,7 $m\/s^2$<\/span>"],"correct":"1","level":"3","hint":"Gia t\u1ed1c là \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng cho s\u1ef1 thay \u0111\u1ed5i c\u1ee7a v\u1eadn t\u1ed1c trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian.<\/p>","answer":"Ch\u1ecdn A.<\/strong><\/span> Gia t\u1ed1c là \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng cho s\u1ef1 thay \u0111\u1ed5i c\u1ee7a v\u1eadn t\u1ed1c trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian. Theo bài ra: c\u1ee9 1 s thì v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt t\u0103ng 3,6 m\/s => a = 3,6 $m\/s^2$<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-25 09:11:08","option_type":"math","len":0},{"id":"5868","mon_id":"1158790","chapter_id":"1158795","post_id":"6342","question":"M\u1ed9t ng\u01b0\u1eddi \u0111ang \u0111i ô tô trên \u0111\u01b0\u1eddng v\u1edbi v\u1eadn t\u1ed1c 60 km\/h thì th\u1ea5y tín hi\u1ec7u \u0111èn \u0111\u1ecf. Sau 10 giây thì xe d\u1eebng l\u1ea1i. Tính \u0111\u1ed9 l\u1edbn gia t\u1ed1c c\u1ee7a ô tô \u0111ó.<\/p>","options":["A. 2,3 $m\/s^2$<\/span>","B. 1,51 $m\/s^2$<\/span>","C. 1,667 $m\/s^2$<\/span>","D. 3,34 $m\/s^2$<\/span>"],"correct":"3","level":"3","hint":"Áp d\u1ee5ng công th\u1ee9c:  $a=\\frac{\\nu_t-\\nu_0}{\\triangle t}$<\/span><\/p>","answer":"Ch\u1ecdn C.<\/strong><\/span> \u0110\u1ed5i 60 km\/h  = 16,67 m\/s Khi xe d\u1eebng l\u1ea1i: $\\nu_t$<\/span> = 0. Ta có  $a=\\frac{\\nu_t-\\nu_0}{\\triangle t}=\\frac{0-16,67}{10}=-1,667(m\/s^2)$<\/span> V\u1eady \u0111\u1ed9 l\u1edbn gia t\u1ed1c c\u1ee7a ô tô là 1,667 $m\/s^2$<\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-25 09:15:55","option_type":"math","len":0}]}