{"id":7553,"date":"2021-11-20T14:01:47","date_gmt":"2021-11-20T07:01:47","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=7553"},"modified":"2021-11-20T17:13:36","modified_gmt":"2021-11-20T10:13:36","slug":"co-phai-moi-loai-banh-xe-deu-la-hinh-tron-khong","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/co-phai-moi-loai-banh-xe-deu-la-hinh-tron-khong\/","title":{"rendered":"C\u00f3 ph\u1ea3i m\u1ecdi lo\u1ea1i b\u00e1nh xe \u0111\u1ec1u l\u00e0 h\u00ecnh tr\u00f2n kh\u00f4ng?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ch\u00fang ta \u0111\u00e3 bi\u1ebft b\u00e1nh xe th\u01b0\u1eddng c\u00f3 d\u1ea1ng h\u00ecnh tr\u00f2n, v\u00ec v\u1eady t\u1eeb c\u00e1c \u0111i\u1ec3m \u1edf v\u00e0nh b\u00e1nh xe \u0111\u1ebfn t\u00e2m b\u00e1nh xe c\u00f3 kho\u1ea3ng c\u00e1ch b\u1eb1ng nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ebf nh\u01b0ng c\u00f3 ph\u1ea3i m\u1ecdi lo\u1ea1i b\u00e1nh xe b\u1eaft bu\u1ed9c \u0111\u1ec1u ph\u1ea3i l\u00e0 h\u00ecnh tr\u00f2n?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong h\u1ec7 th\u1ed1ng b\u00e1nh xe r\u0103ng, n\u1ebfu nh\u01b0 c\u1ea3 \u0111\u00f4i b\u00e1nh xe \u0111\u1ec1u h\u00ecnh tr\u00f2n th\u00ec th\u00f4ng qua s\u1ef1 truy\u1ec1n \u0111\u1ed9ng c\u1ee7a b\u00e1nh xe r\u0103ng, ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u1ed1c \u0111\u1ed9. V\u00ed d\u1ee5 n\u1ebfu b\u00e1nh ch\u1ee7 \u0111\u1ed9ng c\u00f3 50 r\u0103ng c\u00f2n b\u00e1nh b\u1ecb \u0111\u1ed9ng c\u00f3 100 r\u0103ng, th\u00ec khi b\u00e1nh ch\u1ee7 \u0111\u1ed9ng quay 100 v\u00f2ng th\u00ec b\u00e1nh b\u1ecb \u0111\u1ed9ng s\u1ebd quay \u0111\u01b0\u1ee3c s\u1ed1 v\u00f2ng l\u00e0 50. B\u00e1nh b\u1ecb \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed9ng v\u1edbi t\u1ed1c \u0111\u1ed9 ch\u1eadm nh\u01b0ng chuy\u1ec3n \u0111\u1ed9ng \u0111\u00f3 l\u00e0 chuy\u1ec3n \u0111\u1ed9ng \u0111\u1ec1u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u01b0ng ta mu\u1ed1n b\u00e1nh xe chuy\u1ec3n \u0111\u1ed9ng kh\u00f4ng \u0111\u1ec1u th\u00ec ph\u1ea3i l\u00e0m th\u1ebf n\u00e0o? B\u1ea5y gi\u1edd ch\u00fang ta s\u1ebd s\u1eed d\u1ee5ng b\u00e1nh xe kh\u00f4ng ph\u1ea3i h\u00ecnh tr\u00f2n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e1nh xe r\u0103ng h\u00ecnh elip l\u00e0 m\u1ed9t lo\u1ea1i b\u00e1nh r\u0103ng nh\u01b0 v\u1eady, Do h\u00ecnh elip c\u00f3 t\u00ednh ch\u1ea5t l\u00e0 t\u1ed5ng c\u1ee7a c\u00e1c kho\u1ea3ng c\u00e1ch t\u1eeb m\u1ed9t \u0111i\u1ec3m b\u1ea5t k\u00ec \u0111\u1ebfn c\u00e1c ti\u00eau \u0111i\u1ec3m l\u00e0 m\u1ed9t s\u1ed1 kh\u00f4ng \u0111\u1ed5i (v\u00ed d\u1ee5 b\u1eb1ng 2a). N\u1ebfu hai b\u00e1nh xe r\u0103ng elip c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng nhau, th\u00ec ch\u1ec9 c\u1ea7n \u0111i\u1ec1u ch\u1ec9nh gi\u1eef cho kho\u1ea3ng c\u00e1ch hai tr\u1ee5c qua hai ti\u00eau \u0111i\u1ec3m l\u00e0 2a, v\u00e0 c\u1ed1 \u0111\u1ecbnh m\u1ed9t tr\u1ee5c t\u1ea1i m\u1ed9t ti\u00eau \u0111i\u1ec3m th\u00ec kho\u1ea3ng c\u00e1ch t\u1eeb \u0111i\u1ec3m ti\u1ebfp x\u00fac c\u1ee7a c\u00e1c r\u0103ng \u0111\u1ebfn t\u00e2m c\u1ee7a hai tr\u1ee5c b\u1eb1ng 2a. N\u00f3i c\u00e1ch kh\u00e1c l\u00e0 b\u00e1nh xe r\u0103ng c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng. Sau \u0111\u00f3 ta x\u00e9t, gi\u1ea3 s\u1eed b\u00e1nh xe b\u00ean ph\u1ea3i l\u00e0 b\u00e1nh b\u1ecb \u0111\u1ed9ng v\u00e0 thay \u0111\u1ed5i t\u1ed1c \u0111\u1ed9 khi \u0111\u01b0\u1ee3c truy\u1ec1n \u0111\u1ed9ng. T\u1eeb h\u00ecnh 1 \u0111\u1ebfn h\u00ecnh 2, b\u00e1nh ch\u1ee7 \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed9ng m\u1ed9t g\u00f3c 24o th\u00ec b\u00e1nh b\u1ecb \u0111\u1ed9ng s\u1ebd chuy\u1ec3n \u0111\u1ed9ng m\u1ed9t g\u00f3c 45o. T\u1eeb h\u00ecnh 2 \u0111\u1ebfn h\u00ecnh 3 b\u00e1nh ch\u1ee7 \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed9ng 90o th\u00ec b\u00e1nh b\u1ecb \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed9ng 140o, t\u1eeb h\u00ecnh 3 \u0111\u1ebfn h\u00ecnh 4, b\u00e1nh ch\u1ee7 \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed9ng 90o th\u00ec b\u00e1nh b\u1ecb \u0111\u1ed9ng quay m\u1ed9t g\u00f3c 40o. Nh\u01b0 v\u1eady khi quay h\u1ebft n\u1eeda v\u00f2ng th\u00ec b\u00e1nh b\u1ecb \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed9ng ban \u0111\u1ea7u nhanh, v\u1ec1 sau th\u00ec ch\u1eadm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong s\u1ea3n xu\u1ea5t t\u1ef1 \u0111\u1ed9ng ho\u00e1 ng\u01b0\u1eddi ta th\u01b0\u1eddng d\u00f9ng m\u1ed9t lo\u1ea1i b\u00e1nh xe \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cb\u00e1nh l\u1ed3i\u201d (lo\u1ea1i linh ki\u1ec7n cam). Trong v\u00f2ng chuy\u1ec3n \u0111\u1ed9ng c\u00e1c \u0111i\u1ec3m c\u00f3 kho\u1ea3ng c\u00e1ch \u0111\u1ebfn tr\u1ee5c b\u00e1nh xe kh\u00f4ng \u0111\u1ec1u nhau, nh\u01b0 \u1edf h\u00ecnh 5. Tr\u00ean bi\u00ean c\u1ee7a b\u00e1nh xe c\u00f3 m\u1ed9t c\u01a1 c\u1ea5u t\u1ef1a G. Khi b\u00e1nh xe chuy\u1ec3n \u0111\u1ed9ng t\u1eeb (1) &#8211; (4), c\u01a1 c\u1ea5u t\u1ef1a G \u0111\u1ea9y \u1edf v\u00f2ng ngo\u00e0i, khi \u0111\u1ebfn (5) \u0111\u1ed9t nhi\u00ean b\u1ecb ng\u1eadm v\u00e0o, sau \u0111\u00f3 chuy\u1ec3n \u0111\u1ed9ng ti\u1ebfp t\u1ee5c l\u1eb7p l\u1ea1i, nh\u1edd \u0111\u00f3 c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t s\u1ef1 \u0111i\u1ec1u khi\u1ec3n t\u1ef1 \u0111\u1ed9ng n\u00e0o \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u01b0 v\u1eady, kh\u00f4ng c\u00f3 b\u1ea5t k\u00ec s\u1ef1 v\u1eadt n\u00e0o l\u00e0 tuy\u1ec7t \u0111\u1ed1i; c\u00e1c b\u00e1nh xe c\u0169ng nh\u01b0 v\u1eady. Trong khoa h\u1ecdc khi ph\u00e1t minh, s\u00e1ng t\u1ea1o n\u1ebfu g\u1eb7p \u0111i\u1ec1u g\u00ec kh\u00e1c th\u01b0\u1eddng, th\u00ec ph\u1ea3i suy ngh\u0129 t\u00ecm c\u00e1ch khai th\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb kho\u00e1: H\u00ecnh tr\u00f2n; h\u00ecnh elip; B\u00e1nh xe l\u1ed3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ch\u00fang ta \u0111\u00e3 bi\u1ebft b\u00e1nh xe th\u01b0\u1eddng c\u00f3 d\u1ea1ng h\u00ecnh tr\u00f2n, v\u00ec v\u1eady t\u1eeb c\u00e1c \u0111i\u1ec3m \u1edf v\u00e0nh b\u00e1nh xe \u0111\u1ebfn t\u00e2m b\u00e1nh xe c\u00f3 kho\u1ea3ng c\u00e1ch b\u1eb1ng nhau. Th\u1ebf nh\u01b0ng c\u00f3 ph\u1ea3i m\u1ecdi lo\u1ea1i b\u00e1nh xe b\u1eaft bu\u1ed9c \u0111\u1ec1u ph\u1ea3i l\u00e0 h\u00ecnh tr\u00f2n? Trong h\u1ec7 th\u1ed1ng b\u00e1nh xe r\u0103ng, n\u1ebfu nh\u01b0 c\u1ea3 \u0111\u00f4i b\u00e1nh [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,9],"tags":[],"class_list":["post-7553","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-toan-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7553","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=7553"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7553\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7553"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7553"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7553"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}