{"id":728,"date":"2011-07-05T14:39:04","date_gmt":"2011-07-05T14:39:04","guid":{"rendered":"http:\/\/kpv.rs\/?p=728"},"modified":"2011-07-07T09:44:33","modified_gmt":"2011-07-07T09:44:33","slug":"zasto-bumbar-ne-bi-trebalo-da-leti","status":"publish","type":"post","link":"http:\/\/kpv.rs\/?p=728","title":{"rendered":"Za\u0161to bumbar ne bi trebalo da leti?"},"content":{"rendered":"<p style=\"text-align: left;\"><a href=\"http:\/\/kpv.rs\/wp-content\/uploads\/2011\/07\/bumble-bee.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-729\" title=\"bumble-bee\" src=\"http:\/\/kpv.rs\/wp-content\/uploads\/2011\/07\/bumble-bee.jpg\" alt=\"\" width=\"210\" height=\"151\" \/><\/a><\/p>\n<p style=\"text-align: left;\">Jo\u0161 ne tako daleke 1992. godine na\u0161e poznavanje zakona aerodinamike nije bilo dovoljno da objasni kako se ve\u0107ina lete\u0107ih insekata, \u0161i\u0161mi\u0161a i malih ptica odr\u017eava u vazduhu. Naravno, to je na\u0161 problem, a ne bumbarov.<br \/>\nProu\u010davanje aerodinamike usredsre\u0111uje se usko na principe koji se primenjuju kada vazduh klizi preko krilaca pri konstantnoj brzini. S druge strane, insekti koriste svoja krila i za dizanje uvis i za kretanje u pravcu, tako da se u jednom zamahu krilca ne kre\u0107u samo nagore i nadole ve\u0107 i napred i nazad.<br \/>\nIstovremeno, prave komplikovane osmice u kojima se nagib krila neprestano menja. Ovaj pokret dodatno podi\u017ee insekta tako \u0161to pri svakom zamahu nadole stvara vrtloge vazduha niskog pritiska na spoljnim ivicama vrhova krila.<br \/>\nOvaj fenomen je iskori\u0161\u0107en kod letelica sa fiksnim krilima uz podr\u0161ku zakrilaca koji omogu\u0107avaju let na manjim brzinama bez zaustavljanja. Bumbar je poseban slu\u010daj, jer umesto da se vrtlozi vazduha odvajaju od krila gotovo istovremeno kada nastanu, kao \u0161to bi se desilo kod aviona, zbog oblika krila vrtlog se \u201elepi\u201d za mesto gde nastaje i odr\u017eava stalnu silu dodatnog podizanja sve dok traje zamah nadole.<br \/>\nTako bumbari, zapravo, ne kr\u0161e zakone fizike ve\u0107 samo koriste druga\u010dija pravila.<\/p>\n\n<div class=\"jwsharethis\">\nPodelite \u010dlanak: \n<br \/>\n<a href=\"mailto:?subject=Za%C5%A1to%20bumbar%20ne%20bi%20trebalo%20da%20leti%3F&amp;body=http%3A%2F%2Fkpv.rs%2F%3Fp%3D728\">\n<img src=\"http:\/\/kpv.rs\/wp-content\/plugins\/jw-share-this\/email.png\" alt=\"Podelite putem email-a\" \/>\n<\/a>\n<a target=\"_blank\" href=\"http:\/\/www.facebook.com\/sharer.php?u=http%3A%2F%2Fkpv.rs%2F%3Fp%3D728&amp;t=Za%C5%A1to+bumbar+ne+bi+trebalo+da+leti%3F\">\n<img src=\"http:\/\/kpv.rs\/wp-content\/plugins\/jw-share-this\/fb.png\" alt=\"Podelite ovaj tekst na facebook-u\" \/>\n<\/a>\n<a target=\"_blank\" href=\"http:\/\/twitter.com\/intent\/tweet?text=I+like+http%3A%2F%2Fkpv.rs%2F%3Fp%3D728&amp;title=Za%C5%A1to+bumbar+ne+bi+trebalo+da+leti%3F\">\n<img src=\"http:\/\/kpv.rs\/wp-content\/plugins\/jw-share-this\/twitter.png\" alt=\"Podelite putem Twitter-a\" \/>\n<\/a>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Jo\u0161 ne tako daleke 1992. godine na\u0161e poznavanje zakona aerodinamike nije bilo dovoljno da objasni kako se ve\u0107ina lete\u0107ih insekata, \u0161i\u0161mi\u0161a i malih ptica odr\u017eava u vazduhu. Naravno, to je na\u0161 problem, a ne bumbarov. Prou\u010davanje aerodinamike usredsre\u0111uje se usko na principe koji se primenjuju kada vazduh klizi preko krilaca pri konstantnoj brzini. S druge [&hellip;]<\/p>\n","protected":false},"author":53,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[34],"tags":[],"_links":{"self":[{"href":"http:\/\/kpv.rs\/index.php?rest_route=\/wp\/v2\/posts\/728"}],"collection":[{"href":"http:\/\/kpv.rs\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/kpv.rs\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/kpv.rs\/index.php?rest_route=\/wp\/v2\/users\/53"}],"replies":[{"embeddable":true,"href":"http:\/\/kpv.rs\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=728"}],"version-history":[{"count":2,"href":"http:\/\/kpv.rs\/index.php?rest_route=\/wp\/v2\/posts\/728\/revisions"}],"predecessor-version":[{"id":878,"href":"http:\/\/kpv.rs\/index.php?rest_route=\/wp\/v2\/posts\/728\/revisions\/878"}],"wp:attachment":[{"href":"http:\/\/kpv.rs\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=728"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/kpv.rs\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=728"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/kpv.rs\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=728"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}