Bài 4: Độ dịch chuyển và quãng đường đi được

Home Lớp 10 Vật lý 10 - Sách kết nối tri thức Bài 4: Độ dịch chuyển và quãng đường đi đượcBài tập nâng cao

{"common":{"save":0,"post_id":"6304","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5686","mon_id":"1158790","chapter_id":"1158795","post_id":"6304","question":"Hãy xác \u0111\u1ecbnh các \u0111\u1ed9 d\u1ecbch chuy\u1ec3n mô t\u1ea3 \u1edf hình d\u01b0\u1edbi \u0111ây trong t\u1ecda \u0111\u1ed9 \u0111\u1ecba lý. Bi\u1ebft t\u1ec9 xích 1 cm \u1ee9ng v\u1edbi 100 m.<\/p><svg height=\"217\" width=\"318\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g><title><\/title><rect fill=\"#fff\" height=\"219\" id=\"canvas_background\" width=\"320\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><image height=\"219\" id=\"svg_1\" width=\"318\" x=\"2\" xlink:href=\"data:image\/png;base64,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\" y=\"0.49999\"><\/image> <\/g> <\/svg><\/span><\/p>","options":["A. $d_1$<\/span> = 100 m (Tây); $d_2$<\/span> = 200 m (h\u01b0\u1edbng $45^o$<\/span> \u0110ông B\u1eafc)\u200b\u200b\u200b\u200b\u200b\u200b<\/span><\/span>","B. $d_1$<\/span> = 300 m (Tây); $d_2$<\/span> = 200 m (h\u01b0\u1edbng $45^o$<\/span> Tây B\u1eafc)<\/span><\/span>","C. $d_1$<\/span> = 300 m (Tây); $d_2$<\/span> = 100 m (h\u01b0\u1edbng $45^o$<\/span> Tây B\u1eafc) <\/span><\/span>","D. $d_1$<\/span> = 200 m (\u0110ông); $d_2$<\/span> = 200 m (h\u01b0\u1edbng $45^o$<\/span> \u0110ông Nam)<\/span>"],"correct":"2","level":"3","hint":"\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. D\u1ef1a vào hình v\u1ebd, tìm \u0111\u1ed9 l\u1edbn và h\u01b0\u1edbng c\u1ee7a t\u1eebng \u0111\u1ed9 d\u1ecbch chuy\u1ec3n.<\/p>","answer":"Ch\u1ecdn B. Trong t\u1ecda \u0111\u1ed9 \u0111\u1ecba lý \u0111ã cho \u1edf hình v\u1ebd, 1 cm \u1ee9ng v\u1edbi 100m Suy ra $d_1$<\/span> = 300 m (Tây); $d_2$<\/span> = 200 m (h\u01b0\u1edbng $45^o$<\/span> Tây B\u1eafc)<\/strong><\/span>  <\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-10 00:52:48","option_type":"math","len":0},{"id":"5687","mon_id":"1158790","chapter_id":"1158795","post_id":"6304","question":"M\u1ed9t v\u1eadn \u0111\u1ed9ng viên ch\u1ea1y b\u1ed9 trong m\u1ed9t sân v\u1eadn \u0111\u1ed9ng có chi\u1ec1u dài 90 m, chi\u1ec1u r\u1ed9ng 45 m. Bi\u1ebft ng\u01b0\u1eddi \u0111ó ch\u1ea1y 3 vòng quanh sân v\u1eadn \u0111\u1ed9ng. Tính quãng \u0111\u01b0\u1eddng và \u0111\u1ed9 l\u1edbn \u0111\u1ed9 d\u1ecbch chuy\u1ec3n c\u1ee7a ng\u01b0\u1eddi \u0111ó.<\/p>","options":["A. s = 270 m; d = 270 m","B. s = 135 m; d = 90 m","C. s = 810 m; d = 0","D. s = 405 m; d = 135 m"],"correct":"3","level":"3","hint":"Xét \u0111i\u1ec3m xu\u1ea5t phát và \u0111i\u1ec3m k\u1ebft thúc c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng \u0111\u1ec3 xác \u0111\u1ecbnh \u0111\u1ed9 d\u1ecbch chuy\u1ec3n. C\u1ed9ng \u0111\u1ed9 dài \u0111\u01b0\u1eddng \u0111i c\u1ee7a các quá trình chuy\u1ec3n \u0111\u1ed9ng ta \u0111\u01b0\u1ee3c quãng \u0111\u01b0\u1eddng \u0111i \u0111\u01b0\u1ee3c.<\/p>","answer":"<\/span> Ch\u1ecdn C. V\u1eadn \u0111\u1ed9ng viên ch\u1ea1y 3 vòng trên sân v\u1eadn \u0111\u1ed9ng nên \u0111\u1ed9 d\u1ecbch chuy\u1ec3n lúc này s\u1ebd b\u1eb1ng 0, quãng \u0111\u01b0\u1eddng ch\u1ea1y \u0111\u01b0\u1ee3c là 3 l\u1ea7n chu vi sân v\u1eadn \u0111\u1ed9ng \u0111ó. Ta có: d = 0; s = 3.2.(45 + 90) = 810 (m) V\u1eady quãng \u0111\u01b0\u1eddng ng\u01b0\u1eddi \u0111ó ch\u1ea1y \u0111\u01b0\u1ee3c là s = 810 (m); \u0111\u1ed9 d\u1ecbch chuy\u1ec3n c\u1ee7a ng\u01b0\u1eddi \u0111ó là 0.<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-10 01:10:11","option_type":"txt","len":2},{"id":"5688","mon_id":"1158790","chapter_id":"1158795","post_id":"6304","question":"Hai anh em cùng \u0111\u1ea1p xe trên m\u1ed9t \u0111o\u1ea1n th\u1eb3ng AB dài 25 m. Hai ng\u01b0\u1eddi cùng xu\u1ea5t phát t\u1eeb \u0111i\u1ec3m A. Ng\u01b0\u1eddi em \u0111\u1ea1p xe \u0111\u1ebfn \u0111i\u1ec3m B thì d\u1eebng l\u1ea1i ngh\u1ec9, còn ng\u01b0\u1eddi anh thì quay l\u1ea1i \u0111\u1ea1p xe ti\u1ebfp v\u1ec1 \u0111i\u1ec3m A m\u1edbi ngh\u1ec9. G\u1ecdi d$_1$<\/span>, d$_2$<\/span> l\u1ea7n l\u01b0\u1ee3t là \u0111\u1ed9 d\u1ecbch chuy\u1ec3n c\u1ee7a ng\u01b0\u1eddi anh và ng\u01b0\u1eddi em trong c\u1ea3 quá trình. Hãy so sánh $d_1$<\/span><\/strong> và $d_2$<\/span><\/strong>.<\/p>","options":["A.$ d_1 = d_2$<\/span>","B. $d_1 > d_2$<\/span>","C. $d_1 < d_2$<\/span> ","D. $d_1 = -2d_2$<\/span>"],"correct":"3","level":"3","hint":"Ng\u01b0\u1eddi anh \u0111\u1ea1p xe t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B r\u1ed3i quay l\u1ea1i A => $d_1$<\/span> = 0. Ng\u01b0\u1eddi em \u0111\u1ea1p xe t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B => $d_2$<\/span> = 25 m.<\/p>","answer":"<\/span>Ch\u1ecdn C. Trong c\u1ea3 quá trình: + Ng\u01b0\u1eddi anh \u0111\u1ea1p xe t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B r\u1ed3i quay l\u1ea1i A => $d_1$<\/span> = 0. + Ng\u01b0\u1eddi em \u0111\u1ea1p xe t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B => $d_2$<\/span> = 25 m. V\u1eady $d_1< d_2$<\/span><\/strong><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-10 01:30:26","option_type":"math","len":0}]}