{"id":1788,"date":"2025-09-05T08:21:33","date_gmt":"2025-09-05T05:21:33","guid":{"rendered":"https:\/\/blog.edu.turku.fi\/scienceed\/?p=1788"},"modified":"2025-09-05T08:21:33","modified_gmt":"2025-09-05T05:21:33","slug":"experiment-kring-friktion","status":"publish","type":"post","link":"https:\/\/blog.edu.turku.fi\/scienceed\/2025\/09\/05\/experiment-kring-friktion\/","title":{"rendered":"Experiment kring friktion"},"content":{"rendered":"<h2>Material som beh\u00f6vs:<\/h2>\n<ul>\n<li>En rund kakform<\/li>\n<li>En stenkula<\/li>\n<li>Kraftpapper<\/li>\n<li>Filt eller liknande tyg<\/li>\n<li>Sandpapper<\/li>\n<\/ul>\n<h2>Genomf\u00f6rande<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-1786\" src=\"https:\/\/blog.edu.turku.fi\/scienceed\/files\/2025\/09\/Friktion-300x219.jpg\" alt=\"\" width=\"300\" height=\"219\" srcset=\"https:\/\/blog.edu.turku.fi\/scienceed\/files\/2025\/09\/Friktion-300x219.jpg 300w, https:\/\/blog.edu.turku.fi\/scienceed\/files\/2025\/09\/Friktion.jpg 416w\" sizes=\"auto, (max-width: 300px) 85vw, 300px\" \/><\/p>\n<p>Steg 1: Sl\u00e5 p\u00e5 kulan s\u00e5 att den rullar runt kakformens omkrets. Barnen kommer att vilja prova detta flera g\u00e5nger innan de tar experimentet p\u00e5 allvar eftersom det \u00e4r roligt att g\u00f6ra!<\/p>\n<p>\u00d6va p\u00e5 att skicka iv\u00e4g kulan med lika stor kraft varje g\u00e5ng. R\u00e4kna sedan hur m\u00e5nga g\u00e5nger den rullar runt formen innan den stannar. Vi fann att det fungerade bra att starta kulan bredvid h\u00e5let i v\u00e5r kastrullsrand. Det gjorde det l\u00e4tt att r\u00e4kna varv. Varje g\u00e5ng kulan gick f\u00f6rbi h\u00e5let r\u00e4knade vi ytterligare en resa runt.<\/p>\n<p>Steg 2: Testa nu olika ytor f\u00f6r att se hur m\u00e4ngden friktion p\u00e5verkar kulan. Sj\u00e4lva kakformen har v\u00e4ldigt lite friktion.<\/p>\n<p>Prova f\u00f6rst en bit kraftpapper. Rita upp botten av formen p\u00e5 ett ark kraftpapper och klipp ut den. L\u00e4gg sedan kraftpapperscirkeln i botten av kastrullen. Skjut din kula runt pannan igen. Hur m\u00e5nga g\u00e5nger runt \u00e5kte den den h\u00e4r g\u00e5ngen?<\/p>\n<p>Vi uppt\u00e4ckte att v\u00e5r kula f\u00e4rdades 4 g\u00e5nger runt den sl\u00e4ta ytan p\u00e5 kakfatet. Med en yta av byggpapper kunde den bara resa runt 2,5 g\u00e5nger.<\/p>\n<p>Testa vad du har hemma. Vilket tyg som helst fungerar om du inte har filt.<\/p>\n<h2>Teori och fr\u00e5gor att fundera p\u00e5<\/h2>\n<p>Newtons f\u00f6rsta r\u00f6relselag s\u00e4ger att ett f\u00f6rem\u00e5l i r\u00f6relse f\u00f6rblir i r\u00f6relse om det inte p\u00e5verkas av en yttre kraft. Friktion \u00e4r en kraft som bromsar r\u00f6relsen genom att f\u00f6rhindra att f\u00f6rem\u00e5l glider f\u00f6rbi varandra.<\/p>\n<ul>\n<li>Vilken yta hade mest friktion i ditt experiment?<\/li>\n<li>Vilken saktar ner kulan snabbast?<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Material som beh\u00f6vs: En rund kakform En stenkula Kraftpapper Filt eller liknande tyg Sandpapper Genomf\u00f6rande Steg 1: Sl\u00e5 p\u00e5 kulan s\u00e5 att den rullar runt kakformens omkrets. Barnen kommer att vilja prova detta flera g\u00e5nger innan de tar experimentet p\u00e5 allvar eftersom det \u00e4r roligt att g\u00f6ra! \u00d6va p\u00e5 att skicka iv\u00e4g kulan med lika &hellip; <a href=\"https:\/\/blog.edu.turku.fi\/scienceed\/2025\/09\/05\/experiment-kring-friktion\/\" class=\"more-link\">Forts\u00e4tt l\u00e4sa<span class=\"screen-reader-text\"> \u201dExperiment kring friktion\u201d<\/span><\/a><\/p>\n","protected":false},"author":2590,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[218561,4842,218347],"tags":[],"class_list":["post-1788","post","type-post","status-publish","format-standard","hentry","category-experiment","category-fysik","category-veckans-ide"],"_links":{"self":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts\/1788","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/users\/2590"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/comments?post=1788"}],"version-history":[{"count":1,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts\/1788\/revisions"}],"predecessor-version":[{"id":1789,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts\/1788\/revisions\/1789"}],"wp:attachment":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/media?parent=1788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/categories?post=1788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/tags?post=1788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}