Dette er en samlig af fysikopgaver fra forskellige kilder.<\/p>\n\n\n\n
<\/p>\n\n\n\n
Kinetisk energi<\/p>\n\n\n\n
Taget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c610<\/a><\/p>\n\n\n\nBeregn den kinetiske energi af<\/p>\n\n\n\nen tennisbold der lige er blevet sl\u00e5et til. m = 0,057 kg, v = 45 m\/s.<\/li>\n\n\n\nen kop kaffe med masse p\u00e5 0.40 kg der falder mod gulvet med en fart p\u00e5 10 m\/s.<\/li>\n<\/ol>\n\n\nFacit 1.1<\/a>\nDen kinetiske energi af tennisbolden er 58 J<\/b>.\n<\/div><\/div>\n<\/div>\n\n\n\nFacit 1.2<\/a>\nDen kinetiske energi af kaffekoppen er 20 J<\/b>.\n<\/div><\/div>\n<\/div>\n<\/div><\/div><\/div><\/div>\n\n\n\nEAKE002<\/span><\/span><\/span><\/button><\/div>\nTaget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c611<\/a><\/p>\n\n\n\nBeregn den kinetiske energi af<\/p>\n\n\n\nen bil med massen 1200 kg, so k\u00f8rer 80 km\/t.<\/li>\n\n\n\nen mand p\u00e5 en cykel (samlet masse 90 kg) ed en fart p\u00e5 30 km\/t.<\/li>\n<\/ol>\n\n\nFacit 2.1<\/a>\nDen kinetiske energi af bilen er 0,3 MJ<\/b>.\n<\/div><\/div>\n<\/div>\n\n\n\nFacit 1.2<\/a>\nDen kinetiske energi af manden p\u00e5 cyklen er 3 kJ<\/b>.\n<\/div><\/div>\n<\/div>\n<\/div><\/div><\/div><\/div>\n\n\n\nEAKE003<\/span><\/span><\/span><\/button><\/div>\nTaget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c612<\/a><\/p>\n\n\n\nEn kvinde l\u00f8ber s\u00e5 hurtigt hun kan, og p\u00e5g\u00e5r derved en kinetisk energi p\u00e5 1200 J. Denne energi opn\u00e5r hun ved at l\u00f8be 25 km\/t.<\/p>\n\n\n\nHvad er kvindens masse?<\/p>\n\n\nFacit 2.1<\/a>\nKvindens masse er 50 J<\/b>.\n<\/div><\/div>\n<\/div><\/div><\/div>\n\n\n\nEAKE004<\/span><\/span><\/span><\/button><\/div>\nTaget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c613<\/p>\n\n\n\nEn tennisbold med massen 57 g f\u00e5r tilf\u00f8rt kinetisk energi p\u00e5 88 J.<\/p>\n\n\n\nHvor hurtigt kommer bolden til at bev\u00e6ge sig?<\/p>\n<\/div><\/div><\/div>\n\n\n\nEAKE005<\/span><\/span><\/span><\/button><\/div>\nTaget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c614<\/a><\/p>\n\n\n\nEn mand bliver ramt af et projektil fra en revolver og der overf\u00f8res derved 80 J fra projektilet til manden. <\/p>\n\n\n\nHvis en dreng kaster en basket bold og han derved overf\u00f8rer 20 J til bolden. <\/p>\n\n\n\nHvor mange basketbolde-kast fra drengen svarer de 80 J til?<\/li>\n<\/ul><\/div><\/div><\/div>\n\n\n\nEAKE006<\/span><\/span><\/span><\/button><\/div>\nEn mand p\u00e5 87 kg bliver ramt af et projektil fra en revolver. Projektilet bev\u00e6ger sig med farten 200 m\/s og har en masse p\u00e5 4,0 g.<\/p>\n\n\n\nHvis vi antager at al den kinetiske energi overf\u00f8res fra projektilet til manden, hvor hurtigt bev\u00e6ger manden sig efter han er blevet ramt? (Her ser vi bort fra at kan ikke kan l\u00f8be hvis han er d\u00f8d, eller at kan flygter af skr\u00e6k!)<\/p>\n<\/div><\/div><\/div>\n<\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"Dette er en samlig af fysikopgaver fra forskellige kilder. Energi og arbejde Kinetisk energi<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ub_ctt_via":"","editor_plus_copied_stylings":"{}","footnotes":""},"categories":[2,4],"tags":[],"class_list":["post-1323","page","type-page","status-publish","hentry","category-fysik","category-opgave"],"featured_image_src":null,"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1323"}],"version-history":[{"count":3,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323\/revisions"}],"predecessor-version":[{"id":2095,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323\/revisions\/2095"}],"wp:attachment":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Beregn den kinetiske energi af<\/p>\n\n\n
Taget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c611<\/a><\/p>\n\n\n\nBeregn den kinetiske energi af<\/p>\n\n\n\nen bil med massen 1200 kg, so k\u00f8rer 80 km\/t.<\/li>\n\n\n\nen mand p\u00e5 en cykel (samlet masse 90 kg) ed en fart p\u00e5 30 km\/t.<\/li>\n<\/ol>\n\n\nFacit 2.1<\/a>\nDen kinetiske energi af bilen er 0,3 MJ<\/b>.\n<\/div><\/div>\n<\/div>\n\n\n\nFacit 1.2<\/a>\nDen kinetiske energi af manden p\u00e5 cyklen er 3 kJ<\/b>.\n<\/div><\/div>\n<\/div>\n<\/div><\/div><\/div><\/div>\n\n\n\nEAKE003<\/span><\/span><\/span><\/button><\/div>\nTaget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c612<\/a><\/p>\n\n\n\nEn kvinde l\u00f8ber s\u00e5 hurtigt hun kan, og p\u00e5g\u00e5r derved en kinetisk energi p\u00e5 1200 J. Denne energi opn\u00e5r hun ved at l\u00f8be 25 km\/t.<\/p>\n\n\n\nHvad er kvindens masse?<\/p>\n\n\nFacit 2.1<\/a>\nKvindens masse er 50 J<\/b>.\n<\/div><\/div>\n<\/div><\/div><\/div>\n\n\n\nEAKE004<\/span><\/span><\/span><\/button><\/div>\nTaget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c613<\/p>\n\n\n\nEn tennisbold med massen 57 g f\u00e5r tilf\u00f8rt kinetisk energi p\u00e5 88 J.<\/p>\n\n\n\nHvor hurtigt kommer bolden til at bev\u00e6ge sig?<\/p>\n<\/div><\/div><\/div>\n\n\n\nEAKE005<\/span><\/span><\/span><\/button><\/div>\nTaget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c614<\/a><\/p>\n\n\n\nEn mand bliver ramt af et projektil fra en revolver og der overf\u00f8res derved 80 J fra projektilet til manden. <\/p>\n\n\n\nHvis en dreng kaster en basket bold og han derved overf\u00f8rer 20 J til bolden. <\/p>\n\n\n\nHvor mange basketbolde-kast fra drengen svarer de 80 J til?<\/li>\n<\/ul><\/div><\/div><\/div>\n\n\n\nEAKE006<\/span><\/span><\/span><\/button><\/div>\nEn mand p\u00e5 87 kg bliver ramt af et projektil fra en revolver. Projektilet bev\u00e6ger sig med farten 200 m\/s og har en masse p\u00e5 4,0 g.<\/p>\n\n\n\nHvis vi antager at al den kinetiske energi overf\u00f8res fra projektilet til manden, hvor hurtigt bev\u00e6ger manden sig efter han er blevet ramt? (Her ser vi bort fra at kan ikke kan l\u00f8be hvis han er d\u00f8d, eller at kan flygter af skr\u00e6k!)<\/p>\n<\/div><\/div><\/div>\n<\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"Dette er en samlig af fysikopgaver fra forskellige kilder. Energi og arbejde Kinetisk energi<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ub_ctt_via":"","editor_plus_copied_stylings":"{}","footnotes":""},"categories":[2,4],"tags":[],"class_list":["post-1323","page","type-page","status-publish","hentry","category-fysik","category-opgave"],"featured_image_src":null,"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1323"}],"version-history":[{"count":3,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323\/revisions"}],"predecessor-version":[{"id":2095,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323\/revisions\/2095"}],"wp:attachment":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Taget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c612<\/a><\/p>\n\n\n\nEn kvinde l\u00f8ber s\u00e5 hurtigt hun kan, og p\u00e5g\u00e5r derved en kinetisk energi p\u00e5 1200 J. Denne energi opn\u00e5r hun ved at l\u00f8be 25 km\/t.<\/p>\n\n\n\nHvad er kvindens masse?<\/p>\n\n\nFacit 2.1<\/a>\nKvindens masse er 50 J<\/b>.\n<\/div><\/div>\n<\/div><\/div><\/div>\n\n\n\nEAKE004<\/span><\/span><\/span><\/button><\/div>\nTaget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c613<\/p>\n\n\n\nEn tennisbold med massen 57 g f\u00e5r tilf\u00f8rt kinetisk energi p\u00e5 88 J.<\/p>\n\n\n\nHvor hurtigt kommer bolden til at bev\u00e6ge sig?<\/p>\n<\/div><\/div><\/div>\n\n\n\nEAKE005<\/span><\/span><\/span><\/button><\/div>\nTaget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c614<\/a><\/p>\n\n\n\nEn mand bliver ramt af et projektil fra en revolver og der overf\u00f8res derved 80 J fra projektilet til manden. <\/p>\n\n\n\nHvis en dreng kaster en basket bold og han derved overf\u00f8rer 20 J til bolden. <\/p>\n\n\n\nHvor mange basketbolde-kast fra drengen svarer de 80 J til?<\/li>\n<\/ul><\/div><\/div><\/div>\n\n\n\nEAKE006<\/span><\/span><\/span><\/button><\/div>\nEn mand p\u00e5 87 kg bliver ramt af et projektil fra en revolver. Projektilet bev\u00e6ger sig med farten 200 m\/s og har en masse p\u00e5 4,0 g.<\/p>\n\n\n\nHvis vi antager at al den kinetiske energi overf\u00f8res fra projektilet til manden, hvor hurtigt bev\u00e6ger manden sig efter han er blevet ramt? (Her ser vi bort fra at kan ikke kan l\u00f8be hvis han er d\u00f8d, eller at kan flygter af skr\u00e6k!)<\/p>\n<\/div><\/div><\/div>\n<\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"Dette er en samlig af fysikopgaver fra forskellige kilder. Energi og arbejde Kinetisk energi<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ub_ctt_via":"","editor_plus_copied_stylings":"{}","footnotes":""},"categories":[2,4],"tags":[],"class_list":["post-1323","page","type-page","status-publish","hentry","category-fysik","category-opgave"],"featured_image_src":null,"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1323"}],"version-history":[{"count":3,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323\/revisions"}],"predecessor-version":[{"id":2095,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323\/revisions\/2095"}],"wp:attachment":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
En kvinde l\u00f8ber s\u00e5 hurtigt hun kan, og p\u00e5g\u00e5r derved en kinetisk energi p\u00e5 1200 J. Denne energi opn\u00e5r hun ved at l\u00f8be 25 km\/t.<\/p>\n\n\n\n
Hvad er kvindens masse?<\/p>\n\n\n
Taget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c613<\/p>\n\n\n\n
En tennisbold med massen 57 g f\u00e5r tilf\u00f8rt kinetisk energi p\u00e5 88 J.<\/p>\n\n\n\n
Hvor hurtigt kommer bolden til at bev\u00e6ge sig?<\/p>\n<\/div><\/div><\/div>\n\n\n\n
Taget fra https:\/\/ifysikc.ibog.gyldendal.dk\/?id=c614<\/a><\/p>\n\n\n\nEn mand bliver ramt af et projektil fra en revolver og der overf\u00f8res derved 80 J fra projektilet til manden. <\/p>\n\n\n\nHvis en dreng kaster en basket bold og han derved overf\u00f8rer 20 J til bolden. <\/p>\n\n\n\nHvor mange basketbolde-kast fra drengen svarer de 80 J til?<\/li>\n<\/ul><\/div><\/div><\/div>\n\n\n\nEAKE006<\/span><\/span><\/span><\/button><\/div>\nEn mand p\u00e5 87 kg bliver ramt af et projektil fra en revolver. Projektilet bev\u00e6ger sig med farten 200 m\/s og har en masse p\u00e5 4,0 g.<\/p>\n\n\n\nHvis vi antager at al den kinetiske energi overf\u00f8res fra projektilet til manden, hvor hurtigt bev\u00e6ger manden sig efter han er blevet ramt? (Her ser vi bort fra at kan ikke kan l\u00f8be hvis han er d\u00f8d, eller at kan flygter af skr\u00e6k!)<\/p>\n<\/div><\/div><\/div>\n<\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"Dette er en samlig af fysikopgaver fra forskellige kilder. Energi og arbejde Kinetisk energi<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ub_ctt_via":"","editor_plus_copied_stylings":"{}","footnotes":""},"categories":[2,4],"tags":[],"class_list":["post-1323","page","type-page","status-publish","hentry","category-fysik","category-opgave"],"featured_image_src":null,"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1323"}],"version-history":[{"count":3,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323\/revisions"}],"predecessor-version":[{"id":2095,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323\/revisions\/2095"}],"wp:attachment":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
En mand bliver ramt af et projektil fra en revolver og der overf\u00f8res derved 80 J fra projektilet til manden. <\/p>\n\n\n\n
Hvis en dreng kaster en basket bold og han derved overf\u00f8rer 20 J til bolden. <\/p>\n\n\n
En mand p\u00e5 87 kg bliver ramt af et projektil fra en revolver. Projektilet bev\u00e6ger sig med farten 200 m\/s og har en masse p\u00e5 4,0 g.<\/p>\n\n\n\n
Hvis vi antager at al den kinetiske energi overf\u00f8res fra projektilet til manden, hvor hurtigt bev\u00e6ger manden sig efter han er blevet ramt? (Her ser vi bort fra at kan ikke kan l\u00f8be hvis han er d\u00f8d, eller at kan flygter af skr\u00e6k!)<\/p>\n<\/div><\/div><\/div>\n<\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"
Dette er en samlig af fysikopgaver fra forskellige kilder. Energi og arbejde Kinetisk energi<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ub_ctt_via":"","editor_plus_copied_stylings":"{}","footnotes":""},"categories":[2,4],"tags":[],"class_list":["post-1323","page","type-page","status-publish","hentry","category-fysik","category-opgave"],"featured_image_src":null,"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1323"}],"version-history":[{"count":3,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323\/revisions"}],"predecessor-version":[{"id":2095,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/pages\/1323\/revisions\/2095"}],"wp:attachment":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}