<!DOCTYPE html><html><head></head><body style="margin: 0px; background-color: white;" ><div id='sa-content-div-pSdBShew0A' style="position: relative; width:300px"><div style="position:absolute; top:0; right:0; background:white; opacity:0.7; width:17px; height:15px; text-align:center; z-index: 16777270"><img id='sa-adchoices' src="https://creative.stackadapt.com/icons/adchoices/adchoices.png" width="12" height="12"></div><script>try{var sa_adchoices = document.getElementById('sa-adchoices');if (sa_adchoices){sa_adchoices.onclick = function(){window.open('https://www.stackadapt.com/privacy-policy','_blank');}}}catch(err){console.log(err);}</script><a target="_blank" href="https://clk.srv.stackadapt.com/clk?aid=1-0192-176166458715868982523450-1&cid=2209816&adid=10115053&sid=53ae2a59-0f36-402b-bc89-fe73b67c496a&uid=QwwZA47Rs18hH4hG5hwYNA&did=forbes.com%3A%3A159&adurl=https%3A%2F%2Feast.srv.stackadapt.com&t=1761664587&brandname=GS1&adheading=&iidx=0&nid=159&bip=NjYuMjI2LjMyLjE2Mg&conv=true&curl=aHR0cHM6Ly93d3cuZ3MxdXMub3JnL3NtYWxsLWJ1c2luZXNzL2hvdy1nczEtc3VwcG9ydHM%2FdXRtX3NvdXJjZT1zdGFja2FkYXB0JnV0bV9tZWRpdW09cGFpZCZ1dG1fY2FtcGFpZ249c21hbGxidXNpbmVzcy1icmFuZC1hd2FyZW5lc3MmdXRtX2NvbnRlbnQ9aG93LWdzMS1zdXBwb3J0cy1pbWFnZS1wbXAmc2FfZ2FfdHJhY2tlcl9hZHZlcnRpc2VyPTI5NTYwJnNhX2dhX3RyYWNrZXJfY2FtcGFpZ249MjIwOTgxNiZzYV9nYV90cmFja2VyX2FkPTEwMTE1MDUzJnNhX2dhX3RyYWNrZXJfbGluZWl0ZW09MzM3NjU4JnNhX2dhX3RyYWNrZXJfZG9tYWluPWZvcmJlcy5jb20lMjUzQSUyNTNBMTU5&r=" style="color:black; text-decoration:none"><img src="https://cdn.stackadapt.com/creatives/29560/4AtlNpdUfn8JQAnbKzxWvQDIM%23300x600.png"/></a><div><script src="https://cdn.doubleverify.com/dvtp_src.js?ctx=34962712&cmp=DV1436327&sid=stackadapt&plc=stackadapt-dispJS&adsrv=0&advid=3891363&autt=1&dvtagver=6.1.src&ppid=347&auevent=1-0192-176166458715868982523450-1_53ae2a59-0f36-402b-bc89-fe73b67c496a&auadv=29560&aucmp=2209816&aucrtv=10115053&auplc=_ne1AE6vA8k&auxch=159&pltfrm=8839&aufilter2=IQMBFV&aubndl=sa_blank&turl=https%3A%2F%2Fwww.forbes.com%2Fsites%2Fchadorzel%2F2015%2F10%2F11%2Ffootball-physics-big-hits-newtons-laws-and-einsteins-relativity%2F&c1=300&c2=600&gdpr=0&gdpr_consent=" type="text/javascript"></script></div><div></div><div><img src="https://srv.stackadapt.com/cookie?campid=2209816&is_ctv=0&nativeid=10115053&domain=forbes.com%3A%3A159&auctionid=1-0192-176166458715868982523450-1&impindex=0&m=NjYuMjI2LjMyLjE2Mg&isipgen=0&conv=1" width="1" height="1"><img src="https://us-east-win.srv.stackadapt.com/win?aid=1-0192-176166458715868982523450-1&sid=53ae2a59-0f36-402b-bc89-fe73b67c496a&wp=1.32&rid=8d67d483-fd0e-4993-a64b-7aea922c36a3&network=159&t=1761664587&said=1-0192-176166458715868982523450-1&sanid=159" width="1" height="1"></div></div><script src="https://s3.amazonaws.com/stackadapt_public/js/saimp.js" purl="https://east.srv.stackadapt.com" aid="1-0192-176166458715868982523450-1" iidx="0"></script><script src="https://s3.amazonaws.com/stackadapt_public/js/saurl.js" id="sa-url-script" purl="https://east.srv.stackadapt.com" aid="1-0192-176166458715868982523450-1" iid="53ae2a59-0f36-402b-bc89-fe73b67c496a" br_domain="forbes.com" br_ip="66.226.32.162" network="kargo" br_page_url="https://www.forbes.com/sites/chadorzel/2015/10/11/football-physics-big-hits-newtons-laws-and-einsteins-relativity/"></script></body></html>