两个物体A和B,质量分别为m1和m2,互相接触放在光滑水平面上，
\u4e24\u4e2a\u7269\u4f53A\u548cB,\u8d28\u91cf\u5206\u522b\u4e3am1\u548cm2,\u4e92\u76f8\u63a5\u89e6\u653e\u5728\u5149\u6ed1\u6c34\u5e73\u9762\u4e0a\uff0c\u5bf9\u7269\u4f53\u65bd\u4e00\u6c34\u5e73\u63a8\u529bF\uff0c\u5219A\u5bf9B\u7684\u529bF1\u4e3a\uff1f\uff1f\u5bf9\u7269\u4f53\u65bd\u4e00\u6c34\u5e73\u63a8\u529bF\uff1a\u5e94\u8be5\u662f\u5bf9\u7269\u4f53A\u65bd\u4e00\u6c34\u5e73\u63a8\u529bF\u5427\u3002
\u6839\u636e\u52a0\u901f\u5ea6\u4e00\u6837\u3002\u5e94\u8be5\u4e0d\u4f1a\u51fa\u73b0F1=F\u3002
F=a\uff08m1+m2\uff09\u3002
F1=a*m2=F*m2/\uff08m1+m2\uff09\u3002
\u76f8\u4e92\u63a5\u89e6\u662f\u4e0a\u4e0b\u653e\u8fd8\u662f\u5de6\u53f3\u653e\u5462\uff1f
\u5982\u679c\u662f\u5de6\u53f3
\u76f8\u540c\u7684F M1<M2
\u53ea\u53d7F\u65f6 \u52a0\u901f\u5ea6A1>A2
\u6309\u7406\u8bf4 1\u7684\u52a0\u901f\u5ea6\u5c06\u8981\u5927\u4e8e2\u7684
\u6240\u4ee5\u6709\u76f8\u4e92\u4f5c\u7528 FN\u4e0d\u7b49\u4e8e\u96f6
\u4e24\u4e2a\u7269\u4f53\u4e00\u8d77\u8fd0\u52a8
\u52a0\u901f\u5ea6\u5c0f\u4e8eA1\u5927\u4e8eA2
\u6240\u4ee5\u9009B
a=f/（m1+m2）
所以作用力为m1*F/(m1+m2)
绛旓細浜銆丄B涓璧峰仛鍖鍔犻熻繍鍔 A銆乥涓璧疯繍鍔ㄧ殑锛岄鍏堜綔涓轰竴涓暣浣撴潵鐪嬶紝鎺ㄥ姏 F 鎵鍙楁懇鎿﹀姏涓 F1=渭锛m1+m2锛塯 姘村钩鏂瑰悜鍚堝姏涓篎2=F-F1=F-渭锛坢1+m2锛塯 璁惧姞閫熷害涓篴 鏈塅2=锛坢1+m2锛塧 a=锛團-渭锛坢1+m2锛塯锛/锛坢1+m2锛夎鐗╀綋闂翠綔鐢ㄥ姏涓篎3 瀵鐗╀綋B锛鏈 F3-渭m2g=m2a 鍙緱F3...
绛旓細F1t =m1vV1 F2t =m2V2 鍔ㄨ兘1=鍔ㄨ兘2 鍙緱F1/F2=V2/V1>1 鎵浠1>F2 鍙團1S1=F2S2 寰桽1澶т簬S2 浠呬緵鍙傝
绛旓細s2=12脳2脳5m=5m鑻m1=m2锛屽垯f1=f2锛屾牴鎹姩鑳藉畾鐞嗭紝瀵筧鏈夛細WF1-f1s1=0鍚岀悊瀵b鏈夛細WF2-f2s2=0鏁匴F1=WF2锛鏁B閿欒锛孋姝ｇ‘锛汥銆佺敱鍥惧彲寰楋細a1=鈻硋1鈻硉1=2.51.5m/s2=53m/s2锛沘2=鈻硋2鈻硉2=2.03m/s2锛涙牴鎹墰椤跨浜瀹氬緥锛屽浜m1鍒欐湁锛欶1-渭1m1g=m1a1瑙ｅ緱锛欶1=m1锛坅1+渭1g锛...
绛旓細鍔ㄨ兘绛変簬½mv²锛屽姩鑳界浉鍚锛宮1>m2锛屽垯v1<v2锛岄熷害v=a路t锛岀浉鍚屾椂闂磘鍋滀笅鏉ワ紝鎵浠1<a2锛屼綅绉籹=½at²锛屾墍浠1<s2锛屽垵鍔ㄨ兘鐩稿悓锛屽垯鎽╂摝鍔涘仛鍔熺浉鍚岋紝鎽╂摝鍔涘仛鍔焀=f路s锛宻澶х殑f灏忥紝鎵浠2<f1锛岀瓟妗堟湁璇紝閫堿銆
绛旓細閫堿銆傚乏鍥撅細a銆b鍙楀姏骞宠 锛屽脊绨у脊鍔涚瓑浜巄鐨勯噸鍔涳紝鍗砊1=m2*g锛孎=(m1+m2)*g銆傚彸鍥撅細a銆乥鏁翠綋鎵鍙楀悎鍔涗负F锛宎銆乥鐨勫姞閫熷害涓篴=F/(m1+m2)=g銆傝b鎵鍙楀脊绨у脊鍔涗负T2锛屾湁T2=m2*a=m2*g銆傛樉鐒禩1=T2锛屼袱绉嶆儏鍐电殑寮圭哀寮瑰姏鐩哥瓑锛屽洜姝ゅ脊绨т几闀块噺x1=x2銆
绛旓細鏁翠釜杩囩▼鍔汧鍋氱殑鍔熶笌鍚勮嚜鐗╀綋鍙楀埌鐨勬懇鎿﹀姏鍋氱殑鍔熺浉鍚岋紝鍥犱负鑳介噺瀹堟亽锛屼袱涓墿浣浠庨潤姝㈠紑濮嬶紝鏈缁堝張闈欐锛屾墍浠鐨勫姛鍏ㄩ儴琚懇鎿﹀姏鍋氱殑鍔熸秷鑰椼傚姣忎釜鐗╀綋鏉ヨ锛屾懇鎿﹀姏鍦ㄦ暣涓繃绋嬩腑澶у皬涓嶅彉锛屽潎涓簎mg锛屽綋m1=m2鏃讹紝瀹冧滑鍚勮嚜鍋氱殑鍔熺殑澶у皬瀹屽叏鍙栧喅浜庝袱涓墿浣撶殑杩愯璺濈銆傚氨鏄浘涓a锛宐鎶樼嚎涓巘杞寸殑鍖呭洿鐨...
绛旓細鐗╁潡B浣滃寑閫熺洿绾胯繍鍔,鏁呮墍鍙楀悎澶栧姏涓0;姘村钩鏂瑰悜.涓婄墿鍧桝瀵笲鐨勪綔鐢ㄥ姏Fab,妗岄潰瀵笲鐨勬懇鎿﹀姏骞宠 鏈:Fab = u*mb*g = 0.5*2*10 =10(M)鐗╁潡B瀵A鐨浣滅敤鍔涗笌鐗╁潡A瀵笲鐨勪綔鐢ㄥ姏浜掍负浣滅敤鍔涗笌鍙嶄綔鐢ㄥ姏,鍥犳:Fba =Fab =10(N)璁句汉瀵圭墿鍧桝鐨勪綔鐢ㄥ姏澶у皬涓篎,A浣滃寑閫熺洿绾胯繍鍔,鍥犳姘村钩鏂瑰悜涓庡瀭鐩存柟鍚戝悎...
绛旓細鍏堟暣浣撳垎鏋锛屼袱涓墿浣涓璧峰姞閫熻繍鍔紝鍔犻熷害涓 a=锛團1-F2锛/(m1+m2)鐒跺悗鍐嶅崟鐙B鍒嗘瀽锛孊鐨勫姞閫熷害绛変簬鏁翠綋鐨勫姞閫熷害 鐢辩墰浜屽緱 F-F2=m2a A瀵笲鐨勫姏 F=m2a+F2 =m2锛團1-F2锛/(m1+m2) +F2
绛旓細鍏夋粦姘村钩闈笂鐨凙銆丅涓や釜鐗╀綋,璐ㄩ噺鍒嗗埆涓簃1=10kg鍜宮2=20kg鐢ㄧ粏绾跨浉杩(濡傚浘).鐢ㄦ按骞虫亽鍔汧=30N鍚戝彸鎷B,杩愬姩涓繛鎺銆丅鐨勭怀涓紶鍔涗负T1,鐢ㄥ悓鏍峰ぇ灏忕殑姘村钩鎷夊姏F鍚戝乏鎷A,杩愬姩涓繛鎺銆丅鐨... 鍏夋粦姘村钩闈笂鐨凙銆丅涓や釜鐗╀綋,璐ㄩ噺鍒嗗埆涓簃1=10kg鍜宮2=20kg鐢ㄧ粏绾跨浉杩(濡傚浘).鐢ㄦ按骞虫亽鍔汧=30N鍚戝彸鎷塀,杩愬姩涓繛鎺...
绛旓細鍔汧澶у皬鐩哥瓑锛宮1锛瀖2锛岀敱鐗涢】绗浜瀹氬緥鍙煡锛屼袱鐗╀綋鐨勫姞閫熷害鏈夛細a1锛渁2锛岀敱棰樻剰鐭ワ細S1=S2锛岀敱杩愬姩瀛﹀叕寮忓緱锛歋1=12a1t12锛孲2=12a2t22锛屽彲鐭ワ細t1锛瀟2锛岀敱I1=F?t1锛孖2=F?t2锛屽緱锛欼1锛濱2锛鐢卞姩閲忓畾鐞嗗彲鐭モ柍P1=I1锛屸柍P2=I2锛屽垯P1锛濸2锛岀鍓嶇郴缁熸诲姩閲忓悜鍙筹紝纰版挒杩囩▼鍔ㄩ噺瀹堟亽锛岀敱鍔ㄩ噺瀹堟亽...
