动能定理.pdf

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1、精品教案设计资料动能定理绗?鑺?鍔兘瀹氱悊?1 锛庣敤瀹為獙鏉帰绌舵亽鍔涘仛鍔熶笌鐗綋鍔兘鍙樺寲鐨勫叧绯伙紝瀵煎嚭鍔兘瀹氱悊銆?2 锛庣悊瑙姩鑳藉畾鐞嗭紝鐭亾鍔兘瀹氱悊鐨勯傜敤鏉欢锛岀煡閬撶敤鍔兘瀹?銆愰槄璇绘寚瀵笺?1涓?kg锛岀幇鐢竴姘村钩鎺姏F锛?N锛屼娇鐗綋鍋氬寑鍔犻熺洿绾胯繍1s涓篲_J_m/s 锛岃繖鏃剁墿浣撳叿鏈夌殑鍔兘_J 锛涘湪杩?s鍐呯墿浣撳彈鍒扮殑鍚堝姏F鍚堬紳_N锛岀墿浣撳湪杩?s鍐呯殑浣嶇涓篲_m_J 锛屽湪杩欎_鐗綋鍔兘鐨勫彉鍖栥?2锛庨潤?kg 锛岀墿浣撲笌姘村钩闈殑鍔懇鎿洜鏁颁负0.2锛岀幇鐢竴姘村钩鎺姏F锛?N锛屼娇鐗綋鍋氬寑鍔犻熺1s_J_m/s 锛岀墿浣涓

2、篲_m 锛屽姏 F 瀵圭墿浣撳仛鐨勫姛涓篲_J 锛屾懇鎿姏瀵圭墿浣撳仛鐨勫姛涓篲_J 锛岀墿浣撳彈鍒扮殑閲嶅姏鍜屾敮鎸佸姏鍋氬姛涓篲_锛屾墍浠紝鎵鏈夊姏瀵圭墿浣撳仛鐨勫姛鐨勫拰涓篲_J 锛屽湪璇繃绋嬩腑鐗綋鍙楀埌鐨勫悎鍔涗负_N 锛屽悎鍔涚殑鍔熶负_?3勫姛_鍔兘鐨勫彉鍖栥?4精品教案设计资料?鈽呭瀹炲熀纭 1锛庡叧浜庡仛鍔熷拰鐗綋鍔兘鍙锛?A?B 锛庡彧瑕佹湁鎽摝鍔涘?CD氬噺灏?2?锛?A 锛庝箼澶?B 锛庣敳澶?C 锛庝竴鏍峰 D 锛庢棤娉曟瘮杈?3紝瀹冧滑鐨勮川閲忎箣姣斾负 m1:m2=1:2 锛岄熷害涔嬫瘮涓簐 1:v2=2:1 锛屽窛绂讳负s1 鍜宻 2鍔涳紝鍒欙紙 锛?A 锛巗

3、1:s2=1:2 B 锛巗 1:s2=1:1 C 锛巗 1:s2=2:1 D 锛巗 1:s2=4:14 锛庤川閲忎负 m?s负_銆?5锛庢煇浜哄皢2kg繖鏃剁墿浣撶殑閫熷害涓?m/s6颁1m锛岃垵閫熷害鍦拌嚜鐢辫惤涓嬶紝鐗綋钀戒笅鍚庨櫡鍏爞鍦熸繁 h 澶勶紝鍦_锛岀墿浣撶殑閲嶅姏鍔胯兘_銆?鈽呰兘鍔涙彁鍗?7锛庝竴棰楀瓙寮逛互姘村钩閫熷害绌块忓帤搴负3.0m鐨_精品教案设计资料勫浐瀹氭湪鏉垮悗閫熷害鍑忓皬鍒板師鏉殑 1/2忓悓鏍锋潗鏂欑殑鏈澘鐨勫帤搴渶澶氫负_ 8 锛庝粠楂樹负 h 澶勬m 鐨勫皬鐞冿紝钀藉湴鐐逛笌鎶涘嚭鐐规按骞宠窛绂讳负 s 锛屽垯鎶涚悆鏃朵汉瀵圭悆鎵鍋氱殑鍔熶负澶氬皯锛?9锛庢湁涓璐噺涓?.2kg鐨勭墿鍧楋紝浠庨暱涓?m?0掳鐨勫厜钩闈殑鎺 澶勪负寰堢煭鐨勫渾寮?鐗潡鍜屾按骞抽潰闂寸殑鍔懇鎿洜鏁颁负 0.2 锛屾眰锛?锛?锛夌墿鍧楀湪姘村钩闈兘婊戣锛?锛夌墿鍧楀厠鏈嶆懇鎿姏鎵鍋氱殑鍔燂紟锛坓鍙?0m/s2 锛?绗?鑺?鍔兘瀹氱悊 銆愰槄璇绘寚瀵笺?1銆?0.5 0.5 1 0.5 0.5 绛変簬 2銆?2 2 1 4 锛?0 2 2 2J 绛変簬 3銆佺暐 4銆佺暐?1 銆丄CD 2 銆丅 3 銆丏 4 銆?5 銆?1J 6 銆乵g 锛圚锛媓锛?鍑忓皯 mg 锛圚锛媓锛?mg 锛圚锛媓锛?h 7 銆?