# Semester 2 – Day 44

```   I thought a nice little third law warm- up might be to have students calculate the reaction "Force" on Yoda as he uses The Force to levitate Luke's X-Wing fighter out of the swamp in Dagobah. Basically, if The Force were a third-law obeying force, then Yoda would experience a force from the x-wing fighter that would accelerate such that they would meet at their common center of mass. We asssumed myoda  is 25 kg and mx-wing is 5000 kg. Assuming that he accelerated the x-wing at 1 m/s2 , then he experiences an acceleration of 200 mm/s2 . This would have him cover a football field worth of distance in the first second. I claimed that Yoda would suffer severe bruising, yet my students claimed that he would use the force to stop himself... (sigh)     div.wpmrec2x{max-width:610px;} div.wpmrec2x div.u > div{float:left;margin-right:10px;} div.wpmrec2x div.u > div:nth-child(3n){margin-right:0px;} Advertisements (function(g,\$){if("undefined"!=typeof g.__ATA){ g.__ATA.initAd({collapseEmpty:'after', sectionId:26942, width:300, height:250}); g.__ATA.initAd({collapseEmpty:'after', sectionId:114160, width:300, height:250}); }})(window,jQuery); var o = document.getElementById('crt-873678293'); if ("undefined"!=typeof Criteo) { var p = o.parentNode; p.style.setProperty('display', 'inline-block', 'important'); o.style.setProperty('display', 'block', 'important'); Criteo.DisplayAcceptableAdIfAdblocked({zoneid:388248,containerid:"crt-873678293",collapseContainerIfNotAdblocked:true,"callifnotadblocked": function () {var o = document.getElementById('crt-873678293'); o.style.setProperty('display','none','important');o.style.setProperty('visbility','hidden','important'); } }); } else { o.style.setProperty('display', 'none', 'important'); o.style.setProperty('visibility', 'hidden', 'important'); } var o = document.getElementById('crt-1264775259'); if ("undefined"!=typeof Criteo) { var p = o.parentNode; p.style.setProperty('display', 'inline-block', 'important'); o.style.setProperty('display', 'block', 'important'); Criteo.DisplayAcceptableAdIfAdblocked({zoneid:837497,containerid:"crt-1264775259",collapseContainerIfNotAdblocked:true,"callifnotadblocked": function () {var o = document.getElementById('crt-1264775259'); o.style.setProperty('display','none','important');o.style.setProperty('visbility','hidden','important'); } }); } else { o.style.setProperty('display', 'none', 'important'); o.style.setProperty('visibility', 'hidden', 'important'); } Share this:TwitterFacebookGoogleLike this:Like Loading... Related ```
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