{"id":484,"date":"2016-06-06T07:56:00","date_gmt":"2016-06-06T05:56:00","guid":{"rendered":"https:\/\/kids.esa.int\/gravity\/"},"modified":"2026-10-08T00:28:44","modified_gmt":"2026-10-07T22:28:44","slug":"gravity","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/et\/gravity\/","title":{"rendered":"Raskusj\u00f5ud!"},"content":{"rendered":"<div class=\"lede\">\n<p>Kas oled kunagi n\u00e4inud, kuidas puust kukub maha puuvili v\u00f5i m\u00f5ni ese? Ja kas oled kunagi proovinud visata kivi ja vaadata, kuidas see kukub? Seda j\u00f5udu, mis asju \u2018alla t\u00f5mbab\u2019, nimetatakse gravitatsioonij\u00f5uks.<\/p>\n<\/div>\n<p>Maakera gravitatsioonij\u00f5ud t\u00f5mbab meid pidevalt enda poole. See ongi p\u00f5hjus, miks meie jalad p\u00fcsivad alati maapinnal. Me ei pea aga olema Maaga otseses kontaktis, et see meid enda poole t\u00f5mbaks; piisab sellest, et me ei oleks liiga kaugel, et samad j\u00f5ud m\u00f5juksid. Seet\u00f5ttu tiirleb meie enda planeet \u00fcmber P\u00e4ikese ja Kuu tiirleb \u00fcmber Maa.<\/p>\n<p>Raskusj\u00f5ud s\u00f5ltub objekti massist. Kahe objekti vaheline raskusj\u00f5ud on proportsionaalne nende massidega ning see v\u00e4heneb v\u00e4ga kiiresti, niipea kui me need \u00fcksteisest eemaldame. Tegelikult t\u00f5mbame ka meie objekte \u2018oma\u2019 raskusj\u00f5uga ligi, kuid oleme liiga kerged, et selle m\u00f5ju m\u00e4rgata! P\u00e4ike on aga nii suur, et suudab meid enda l\u00e4hedal hoida isegi siis, kui ta on nii kaugel. Ka Kuu avaldab oma gravitatsioonij\u00f5udu; kuna ta on Maast v\u00e4iksem ja kergem, siis kui me saaksime end seal kaaluda, avastaksime, et kaalume seal umbes kuuendiku sellest, mida kaalume Maal.<\/p>\n<p>V\u00f5iks k\u00fcsida, miks Kuu ei kukku Maale nagu \u00f5un puust. P\u00f5hjus on selles, et Kuu ei seisa kunagi paigal. Ta liigub pidevalt meie \u00fcmber. Ilma Maa gravitatsioonij\u00f5uta h\u00f5ljuks ta lihtsalt kosmosesse. See kiiruse ja Maast kauguse kombinatsioon v\u00f5imaldab Kuul alati hoida tasakaalu kukkumise ja p\u00f5genemise vahel. Kui ta liiguks kiiremini, p\u00f5geneks ta; kui ta liiguks aeglasemalt, kukuks ta alla!<\/p>\n<p>Me \u00fctlesime, et gravitatsioonij\u00f5ud s\u00f5ltub ka kaugusest. Kui me eemalduksime piisavalt kaugele, saaksime selle haardest vabaneda. Just seda me kosmoselaevadega p\u00fc\u00fcamegi teha. Peame saavutama ja \u00fcletama niinimetatud \u2018p\u00f5genemiskiiruse\u2019, mis on umbes 11,2 km\/s (sellise kiirusega saaksime liikuda Londonist New Yorki vaid k\u00fcmne minutiga!). Kui kosmoses\u00fcstik saavutab selle kiiruse, v\u00f5ib ta vabalt liikuda P\u00e4ikeses\u00fcsteemis.<\/p>\n<p>Orbiidil tiirlevas kosmoses\u00fcstikus ei tunne me Maa gravitatsioonij\u00f5udu. Esemed ei kuku, vaid h\u00f5ljuvad; kui h\u00fcppad \u00fcles, ei tule sa tagasi alla. Sama juhtub astronautidega, kui nad viibivad Maa \u00fcmber tiirlevates kosmosejaamades!<\/p>\n<nav class=\"related\" aria-label=\"Seotud\">\n<h2 class=\"related__heading\">Seotud<\/h2>\n<div class=\"grid related__grid\">\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/et\/maanen_jorden_og_tyngdekraften2\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">Taani<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/et\/de_maan_de_aarde_en_zwaartekracht\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">hollandi keel<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/et\/la_lune_la_terre_et_la_gravite\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">prantsuse keel<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/et\/mond_erde_und_schwerkraft\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">Saksa keel<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/et\/la_luna_la_terra_e_la_gravita\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">itaalia keel<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/et\/maanen_jorden_og_tyngdekraften\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">norra keel<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/et\/ksiezyc_ziemia_i_grawitacja\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">Poola<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/et\/la_luna_la_tierra_y_la_gravedad\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">hispaania keel<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"\/et\/maanen_jorden_och_gravitation\/\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">Rootsi<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<\/div>\n<\/nav>","protected":false},"excerpt":{"rendered":"<p>Have you ever seen a fruit or object falling from a tree? And have you ever tried to throw a stone and watch it fall? This force that \u2018brings down\u2019 [&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\/2016\/06\/gravity_apple_newton\/17897755-2-eng-GB\/Gravity_apple_Newton.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\/2016\/06\/Gravity_apple_Newton","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":[10,11,19],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-484","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-story-of-the-universe"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/484","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/comments?post=484"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/484\/revisions"}],"predecessor-version":[{"id":1627,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/484\/revisions\/1627"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/media?parent=484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/categories?post=484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/tags?post=484"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/panel?post=484"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/language?post=484"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/age?post=484"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/duration?post=484"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/resource_type?post=484"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/audience?post=484"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/wf_post_folders?post=484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}