一辆车以时速30km/h撞到人，人会被撞飞多远
\u7b80\u5355\u7269\u7406\u9898.\u4e00\u8f86\u8f66\u4ee5\u65f6\u901f30km/h\u649e\u5230\u4eba,\u4eba\u4f1a\u88ab\u649e\u98de\u591a\u8fdc? \u5728\u7ebf\u7b49\u7b54\u6848\u6839\u636e\u52a8\u91cf\u5b88\u6052\uff0c\u5982\u679c\u4e00\u4e2a\u6c7d\u8f663\u5428\u91cd\uff0c\u4e00\u4e2a\u4eba70\u516c\u65a4\u91cd\uff0c\u6c7d\u8f66\u7684\u901f\u5ea6\u7ea610m/s\uff0c\u4eba\u770b\u505a\u662f\u9759\u6b62\u7684\u90a3\u4e48\u3002\u649e\u4eba\u540e\u6c7d\u8f66\u7684\u901f\u5ea6\u4e3a9.5m/s\uff0c\u4eba\u7684\u901f\u5ea6\u4e3ax
m(v0-v1)=m(x-0)
\u4eba\u98de\u51fa\u53bb\u7684\u901f\u5ea6\u5e94\u8be5\u662f\uff1a20m/s\uff0c\u90a3\u4e48\u4f60\u5e94\u8be5\u53ef\u4ee5\u8ba1\u7b97\u51fa\u8fd9\u4e2a\u8ddd\u79bb\u4e86\u5427\u3002
\u5047\u8bbe\u4eba\u5728\u7a7a\u4e2d\u4ee510m/s2\u7684\u52a0\u901f\u5ea6\u51cf\u901f\u5728\u7a7a\u4e2d\u98de\u884c1\u79d2\u7684\u8bdd\uff1a20-5=15m\u3002
\u90a3\u4e48\u4ee5\u8fd9\u6837\u7684\u901f\u5ea6\u649e\u4eba\u98de\u51fa\u53bb\u7684\u8ddd\u79bb\u662f\u76f8\u5f53 \u5413\u4eba\u7684\u3002\u4f30\u8ba1\u5c31\u6b7b\u7fd8\u7fd8\u4e86\u3002
\u7eaf\u7269\u7406\u4f30\u7b97\u7f62\u4e86\u3002
\u3000\u3000\u5047\u5b9a\u8f7f\u8f66\u91cdM\uff0c\u4eba\u91cdm\u3002\u4eba\u548c\u8f66\u78b0\u649e\u65f6\u7684\u80fd\u8017\u7cfb\u6570\u4e3a1-\u03b7\uff0c\u4eba\u4e0e\u8f66\u524d\u76d6\u7684\u78b0\u649e\u7cfb\u6570\u4e3a\u03be\uff0c\u8f66\u524d\u76d6\u7684\u6c34\u54c1\u503e\u89d2\u4e3a\u03b8\u3002\u8f66\u5728\u649e\u4eba\u524d\u7684\u901f\u5ea6\u4e3aV\u3002
\u3000\u3000\u7ea6\u5b9a\u4e00\u4e2a\u201c\u78b0\u649e\u8d28\u91cf\u53c2\u6570\u201d\u4e3aN=sqrt(\u03b7m^2-(1-\u03b7)Mm)\uff0c\u90a3\u4e48\uff0c\u8f66\u4e0e\u4eba\u649e\u4ee5\u540e\u7684\u8f66\u4e0e\u4eba\u7684\u901f\u5ea6\u5206\u522b\u662f\uff1a
\u3000\u3000V\u8f66=(M-N)/(M+m)*V V\u4eba=(m+N)/(M+m)*M/m*V
\u3000\u3000\u4ece\u800c\uff0c\u4eba\u76f8\u5bf9\u8f66\u7684\u901f\u5ea6\u4e3aN/M*V\u3002
\u3000\u3000\u4eba\u4e0e\u8f66\u524d\u76d6\u7684\u78b0\u649e\uff0c\u53ef\u4ee5\u770b\u4f5c\u4eba\u5728\u65cb\u8f6c\uff0c\u7136\u540e\u649e\u4e0a\u8f66\u524d\u76d6\uff0c\u53d1\u751f\u4e00\u6b21\u78b0\u649e\u3002\u4e00\u822c\u8f66\u524d\u76d6\u90fd\u5f88\u5e73\uff0c\u6240\u4ee5\u4e0d\u8003\u8651\u8f66\u7684\u901f\u5ea6\u6539\u53d8\u3002\u8fd9\u91cc\u80fd\u91cf\u53d1\u751f\u635f\u8017\uff0c\u7136\u540e\u4eba\u88ab\u5f39\u56de\u3002\u4ece\u800c\uff0c\u5f39\u56de\u65f6\u4eba\u7684\u901f\u5ea6\u4e3a\u4eba\u76f8\u5bf9\u8f66\u7684\u901f\u5ea6\u4e58\u03be\uff0c\u89d2\u5ea6\u4e3a\u6c34\u5e73\u5939\u89d290-\u03b8\u3002
\u3000\u3000\u8fd9\u6837\u5c31\u53ef\u4ee5\u4f30\u7b97\u51fa\u4eba\u76f8\u5bf9\u8f66\u7684\u6c34\u5e73\u5206\u901f\u5ea6\u4e0e\u5782\u76f4\u5206\u901f\u5ea6\u3002\u7136\u540e\u6298\u5408\u5230\u539f\u672c\u7684\u5750\u6807\u7cfb\u4e2d\uff0c\u5c31\u80fd\u7ed9\u51fa\u4eba\u98de\u8d70\u7684\u6c34\u5e73\u901f\u5ea6\u4e0e\u5782\u76f4\u901f\u5ea6\u3002
\u3000\u3000\u516c\u5f0f\u592a\u9ebb\u70e6\uff0c\u8fd9\u91cc\u4e0d\u5199\u4e86\u3002
\u3000\u3000\u4e00\u822c\uff0c\u8f66\u7684\u8d28\u91cf\u4e3a1500KG\uff08\u8981\u770b\u724c\u5b50\u548c\u578b\u53f7\uff0c\u67091470\u7684\uff0c\u67091550\u7684\uff0c\u8fd9\u4e2a\u770b\u60c5\u51b5\u3002\u8fd9\u91cc\u5c31\u7b971500\u597d\u4e86\uff09\u3002\u4eba\u7684\u4f53\u91cd\u7b9755KG\uff08\u4e5f\u662f\u4f30\u7b97\u7684\uff09\u3002\u80fd\u8017\u7cfb\u6570\u4e3a0.03\uff0c\u78b0\u649e\u7cfb\u6570\u7b970.5\uff0c\u6bd5\u7adf\u662f\u8089\u4f53\uff0c\u5dee\u4e0d\u591a\u7b97\u662f\u5f88\u4e25\u91cd\u7684\u975e\u5f39\u6027\u78b0\u649e\u4e86\uff0c\u6240\u4ee5\u88ab\u649e\u7684\u65f6\u5019\u5df2\u7ecf\u6536\u4e86\u5185\u4f24\u3002\u8f66\u524d\u76d6\u7b97\u89d2\u5ea6\u4e3a10\u5ea6\u3002
\u3000\u3000\u8fd9\u6837\uff0c\u8981\u628a\u4e00\u4e2a\u4eba\u649e\u98de20\u7c73\uff0870\u7801\u6848\u7684\u8ddd\u79bb\uff09\uff0c\u8f66\u901fV\u8981\u662f117\u7801\u3002\u5982\u679c\u78b0\u649e\u7cfb\u6570\u7b970.7\uff0c\u90a3\u4e5f\u898198\u7801\u3002\u5b9e\u9645\u60c5\u51b5\u4e2d\uff0c\u8fd8\u8981\u8003\u8651\u4e0a\u7a7a\u6c14\u963b\u529b\u8fd9\u4e2a\u5f88\u5927\u7684\u56e0\u7d20\uff08\u548c\u7269\u4f53\u7684\u5f62\u72b6\u4ee5\u53ca\u901f\u5ea6\u6210\u6b63\u6bd4\u3002\u9ad8\u901f\u7684\u65f6\u5019\u8fd8\u548c\u901f\u5ea6\u7684\u5e73\u65b9\u6210\u6b63\u6bd4\u3002\u4eba\u662f\u4e00\u4e2a\u4e25\u91cd\u975e\u6d41\u7ebf\u578b\u7269\u4f53\uff0c\u6240\u4ee5\u963b\u529b\u662f\u5f88\u725b\u53c9\u7684\uff09\uff0c\u8f66\u901f\u53ea\u53ef\u80fd\u66f4\u5feb\uff0c\u4e0d\u53ef\u80fd\u66f4\u6162\u3002
m(v0-v1)=m(x-0)
人飞出去的速度应该是：20m/s，那么你应该可以计算出这个距离了吧。
假设人在空中以10m/s2的加速度减速在空中飞行1秒的话：20-5=15m。
那么以这样的速度撞人飞出去的距离是相当 吓人的。估计就死翘翘了。
绛旓細缁濆鏄鏃堕80鍏噷鐨勬ā寮忕渷娌瑰晩锛岃繖涓嶄粎浠呮槸姹借溅宸ヤ綔鏃堕棿鐨勯棶棰樸1.4鎺掗噺鐨勮溅鎸夌収浣犵殑璁惧畾璺戜笅鏉ュぇ姒傚彲浠ョ渷娌3L宸﹀彸
绛旓細鏍规嵁銆婁腑鍗庝汉姘戝叡鍜屽浗閬撹矾浜ら氬畨鍏ㄦ硶瀹炴柦鏉′緥銆嬬鍥涘崄鍏潯锛岄┚椹舵満鍔ㄨ溅琛岄┒涓亣鏈変笅鍒楁儏褰箣涓鐨勶紝鏈楂樿椹閫熷害涓嶅緱瓒呰繃30km/h锛屽叾涓嫋鎷夋満銆佺數鐡惰溅銆佽疆寮忎笓鐢ㄦ満姊拌溅涓嶅緱瓒呰繃姣忓皬鏃15鍏噷锛1銆佽繘鍑洪潪鏈哄姩杞﹂亾锛岄氳繃閾佽矾閬撳彛銆佹ュ集璺佺獎璺佺獎妗ユ椂锛2銆佹帀澶淬佽浆寮佷笅闄″潯鏃讹紱3銆侀亣闆俱侀洦銆侀洩銆佹矙灏樸...
绛旓細涓杈嗘苯杞浠庣敳鍦板紑寰涔欏湴,鍘荤殑鏃跺姹借溅浠姣忓皬鏃30鍗冪背鐨閫熷害琛岄┒120鍗冪背锛屼粠鍘熻矾杩斿洖鏃舵苯杞﹀張浠ユ瘡灏忔椂20鍗冪背鐨勯熷害琛岄┒銆傗埖鍘绘椂鐢ㄤ簡120梅30=4灏忔椂 鍥炴潵鏃剁敤鏃120梅20=6灏忔椂 鈭磋繖杈嗘苯杞﹀線杩旂殑骞冲潎閫熷害鏄細120*2梅锛4+6锛=24鍗冪背/姣忓皬鏃躲
绛旓細澶т紬姹借溅鐨勬椂閫熻〃锛屼负浣曡璁捐鎴愪笉绛夊垎鐨勶紵鐢熸椿涓湁寰堝缁嗚妭锛屽ぇ浼楄溅鍦ㄤ华琛ㄧ洏涓浠ユ椂閫30km/h鍜50km/h鏍囨垚绾㈣壊锛屼絾鍏朵粬杞﹀垯涓嶇劧銆 杩欎袱涓綅缃鏍囪涓虹孩鑹茬殑鐩殑鏄粈涔堝憿锛 鍥藉唴涔熸病鏈夋硶瑙勬槸鍥犱负澶т紬杞︽湁浠涔堢壒娈婄殑鎬ц兘鍚楋紵澶т紬姹借溅30銆50km澶勪负浠涔堜細鍙樼孩锛 杩欎釜璁捐鐪熺殑寰堟 鍥犱负30km/h鏄氳繃...
绛旓細浠庢暣浣撴潵鐪嬶紝30km/h鍜50km/h鐨勬爣绾㈣捣鐫涓涓璀︾ず浣滅敤锛岄殢鏃舵彁绀哄痉鍥介┚椹惰呬滑娉ㄦ剰闄愰燂紝閬垮厤韬闄愰熷尯鑰屼笉鑷煡鐨勬儏鍐点傜粏鍒嗘潵鐪嬶紝30km/h鍜50km/h鐨勭‘绔嬩笌姹借溅鎵鍦ㄥ尯鍩熷瘑鍒囩浉鍏炽傚ス璇村湪娆ф床鏈変竴涓被浼煎浗鍐呭叕鐩婄粍缁囩殑鏈烘瀯锛屽″娆х洘鍚勫煄甯傚皢閮ㄥ垎浜哄憳娴佸姩瀵嗛泦鐨勯亾璺檺鍒杞﹂涓30鍏噷锛屼互淇濊瘉瀹夊叏銆30鍏噷鐨...
绛旓細鑷杞﹂獞浜40鍒嗛挓灏辨槸涓夊垎涔嬩簩灏忔椂锛屾墍浠ヨ矾绋媠=鑷杞﹂熷害42km/h脳鏃堕棿涓夊垎涔嬩簩灏忔椂=28鍏噷 鐢靛姩杞﹂獞瀹屾昏矾绋嬬敤鐨勬椂闂磘=璺▼s梅鐢靛姩杞﹂熷害30km/h=56鍒嗛挓 鍥犱负宸茬粡楠戜簡40鍒嗛挓锛屾墍浠ョ數鍔ㄨ溅杩樻湁56-40=16鍒嗛挓鍒扮粓鐐癸紝鏈涢噰绾
绛旓細鍦ㄤ竴鑸儏鍐典笅锛岀數鍔ㄨ溅鐨勯┚椹閫熷害绾︿负30km/h銆傚鏋滄寜鐓ц繖涓熷害椹鹃┒锛岄獞琛30鍏噷澶х害闇瑕45鍒嗛挓宸﹀彸锛屽叿浣撶殑楠戣鏃堕棿杩樿鏍规嵁璺喌鏉ュ喅瀹氥傜數鍔ㄨ溅鐨勯┚椹惰绋嬩富瑕佸彇鍐充簬鐢靛姩杞︿娇鐢ㄧ殑鐢电摱瀹归噺銆傚湪浣跨敤鐢靛姩杞︿箣鍓嶏紝闇瑕佹鏌ヤ竴涓嬬數鍔ㄨ溅鐨勮儙鍘嬶紝鍥犱负鑳庡帇涓嶈冻涔熶細褰卞搷鑰楃數閲忋傜數鍔ㄨ溅楠戣娉ㄦ剰浜嬮」 鍦ㄩ獞琛岀數鍔ㄨ溅鐨勮繃绋...
绛旓細鍦ㄩ檺閫熶负50鍏噷浠ヤ笅鐨勯亾璺紝瓒呴50%浠ヤ笂涓嶅埌70%鐨勶紝澶300鍏冪綒娆撅紝瓒呴70%鐨勶紝澶500鍏冪綒娆俱備粠2013骞村厓鏃﹁捣锛灏忚溅瓒呰繃瑙勫畾鏃堕50%鐨勶紝涓娆℃ф墸12鍒嗐
绛旓細鎹祴绠楋紝鍚涓杈嗚娇杞︿互80km/h瑕佹瘮浠150km/h鐪佹补20%锛屼互妗戝绾宠娇杞︿负渚嬶紝琛岄┒鐩稿悓鐨勮矾闈㈢浉鍚岀殑璺濈椹讹紝鍦ㄥ钩鐩撮亾璺笂浠60km/h鐨閫熷害鏈鐪佹补;琛岃嫢浠30km/h鐨勯熷害琛岄┒锛屽垯澶氳楁补7鈥斺8%锛岃嫢浠80km/h鐨勯熷害琛岄┒锛屽垯澶氳楁补9%鈥斺13%銆傛苯杞﹁椹惰楁补鐨勫灏戯紝涓昏鍙栧喅浜庡彂鍔ㄦ満鐨勬补鑰楃巼鍜屽厠鏈嶈椹堕樆鍔涙墍...
绛旓細鎬庝箞鏍,涓涓灏忓皬鐨勪华琛ㄧ洏涔熶綋鐜颁簡寰峰浗鐨勫ぇ鍥藉伐鍖犵簿绁,鏈夋病鏈変笣涓濈殑鐨勬暚浣╀箣鎯?娆㈣繋鐣欒█璇勮! 鍥藉唴鍚勭鍨嬪彿鐨勫ぇ浼楄溅,鍦ㄤ华琛ㄧ洏涓鏃堕30km/h鍜50km/h澶勯兘鏄鏍囩孩鐨,涓嶇煡閬撳悇浣嶅ぇ浼楄溅杞︿富鏄惁鑰冭檻杩囪溅瀛愬湪杩欎袱涓綅缃爣绾㈢殑鐩殑鏄粈涔? 30km/h鏄粡杩囧鏍°佽矾鍙ｉ檺鍒剁殑閫熷害,鎵浠ユ爣绾㈡彁閱掕溅涓昏闄愰?鍏跺疄杩欑璇存硶鏄...
