{"id":836,"date":"2004-12-02T15:57:00","date_gmt":"2004-12-02T14:57:00","guid":{"rendered":"https:\/\/kids.esa.int\/how_does_a_rocket_work\/"},"modified":"2026-10-08T00:32:49","modified_gmt":"2026-10-07T22:32:49","slug":"how_does_a_rocket_work","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/how_does_a_rocket_work\/","title":{"rendered":"Hur fungerar en raket?"},"content":{"rendered":"<div class=\"lede\">\n<p>Har du lagt m\u00e4rke till vad som h\u00e4nder om du sl\u00e4pper ut luften ur en ballong? Luften str\u00f6mmar \u00e5t ett h\u00e5ll och ballongen r\u00f6r sig i motsatt riktning. Raketer fungerar p\u00e5 ungef\u00e4r samma s\u00e4tt. Avgaser som str\u00f6mmar ut ur motorns munstycke med h\u00f6g hastighet driver raketen fram\u00e5t.<\/p>\n<\/div>\n<p>De flesta moderna b\u00e4rraketer, till exempel den europeiska Ariane 5, \u00e4r mycket komplicerade och v\u00e4ger flera hundra ton vid uppskjutningen. Den st\u00f6rsta delen av denna vikt utg\u00f6rs av br\u00e4nsle, till exempel flytande v\u00e4te och flytande syre.<\/p>\n<p>Raketer beh\u00f6ver s\u00e5 mycket br\u00e4nsle f\u00f6r att \u00f6vervinna jordens gravitation. F\u00f6rst n\u00e4r de n\u00e5r en hastighet p\u00e5 28 000 km\/h f\u00e4rdas de tillr\u00e4ckligt fort f\u00f6r att g\u00e5 in i omloppsbana.<\/p>\n<p>De flesta raketer best\u00e5r av tv\u00e5 eller tre steg. N\u00e4r ett steg har f\u00f6rbrukat allt sitt br\u00e4nsle kopplas det bort f\u00f6r att bli av med den on\u00f6diga vikten. D\u00e4refter faller det tillbaka (vanligtvis i havet och l\u00e5ngt fr\u00e5n bebyggda omr\u00e5den) eller brinner upp i atmosf\u00e4ren.<\/p>\n<p>Stora b\u00e4rraketer f\u00e5r ofta en extra kraft\u00f6kning fr\u00e5n raketer som \u00e4r fastsp\u00e4nda p\u00e5 den f\u00f6rsta steget. Dessa kan drivas med fast eller flytande br\u00e4nsle. \u00c4ven de kastas vanligtvis bort.<\/p>","protected":false},"excerpt":{"rendered":"<p>Have you noticed what happens if you let the air out of a balloon? The air goes one way and the balloon moves in the opposite direction. Rockets work in [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2004\/12\/balloons2\/17894905-2-eng-GB\/balloons.jpg","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/12\/balloons2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,41,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-836","post","type-post","status-publish","format-standard","hentry","category-learn","category-rockets-technology","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=836"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/836\/revisions"}],"predecessor-version":[{"id":1979,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/836\/revisions\/1979"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=836"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=836"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=836"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=836"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=836"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=836"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=836"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}