ÌâÄ¿ÄÚÈÝ

ÈçͼËùʾ£¬¾øÔµµ¯»É×ó¶Ë¹Ì¶¨ÔÚOµã£¬ÓÒ¶ËÁ¬½ÓһľϻA£¬Ä¾Ï»A·ÅÔڹ⻬ˮƽÃæÉÏ£¬Ä¾Ï»AÄڱڹ⻬£¬ÄÚ±Ú×ó±ßÓþøԵϸÉþÀ­×ÅÒ»¸ö¾øÔµ´øµçÎï¿éB£¨¿ÉÊÓΪÖʵ㣩£¬AºÍBµÄÖÊÁ¿¶¼Îªm=1kg£¬A²»´øµç£¬BµÄµçÁ¿Îªq=2¡Á10-5C£¬B¾àľϻÄÚ±ÚÓÒ²àµÄ¾àÀëΪd=16cm£¬Õû¸ö×°Öô¦ÔÚˮƽÏòÓÒµÄE=5¡Á105V/mÔÈÇ¿µç³¡ÖУ®µ±ËüÃǶ¼¾²Ö¹Ê±£¬µ¯»É³¤¶ÈΪL£®Ä³Ê±¿Ì£¬Á¬½ÓÎï¿éBµÄϸÏßͻȻ¶Ï¿ª£¬ÔÚľϻÏò×óÔ˶¯µ½ËٶȸÕΪ0ʱ£¬BºÍAµÄÄÚ±ÚÓÒ²àÏàÅö£¬Åöײºó½áΪһÌ壬µ±Ô˶¯µ½µ¯»É³¤¶ÈÓÖΪLʱ£¬ËٶȱäΪv¡ä=1m/s£¬ÉèÎᆱӢ¼Ò½ÌÍø¿éBÓëAÏ໥×÷Óùý³ÌÖÐʼÖÕ²»·¢ÉúµçºÉתÒÆ£¬Çó£º
£¨1£©BÓëAÅöײÖж¯ÄܵÄËðʧ¡÷Ek£»
£¨2£©µ¯»ÉµÄ¾¢¶ÈϵÊýk£®
·ÖÎö£º£¨1£©´ÓÉþ¶Ï¿ªÊ¼µ½A¡¢B½áΪһÌåÔ˶¯µ½µ¯»É³¤¶ÈÓÖΪLʱ£¬µ¯»ÉÖе¯ÐÔÊÆÄܲ»±ä£¬½áºÏµç³¡Á¦×ö¹¦£¬ÔËÓÃÄÜÁ¿Êغ㶨ÂÉÇó³öÅöײ¹ý³ÌÖж¯ÄܵÄËðʧ£®
£¨2£©A¡¢BÅöײ¹ý³ÌÖж¯Á¿Êغ㣬¸ù¾Ý¶¯Á¿Êغ㶨ÂɺÍÄÜÁ¿Êغ㶨ÂÉÇó³öÅöײǰBµÄËٶȣ¬´Ó¶ø¶ÔBÔËÓö¯Äܶ¨ÀíµÃ³öBµÄλÒÆ£¬µÃ³öAÏò×óÔ˶¯µÄ¾àÀ룮Ï߶Ϻó£¬AÏò×ó×ö¼òгÔ˶¯£¬¸Õ¿ªÊ¼ÎªÓÒ±ß×î´óλÒƵ㣬´Ëʱµ¯»ÉÉ쳤Ϊx1£¬½áºÏx=2x1£¬×¥×¡³õ״̬ƽºâ£¬¸ù¾Ýºú¿Ë¶¨ÂÉÇó³ö¾¢¶ÈϵÊýµÄ´óС£®
½â´ð£º½â£º£¨1£©´ÓÉþ¶Ï¿ªÊ¼µ½A¡¢B½áΪһÌåÔ˶¯µ½µ¯»É³¤¶ÈÓÖΪLʱ£¬µ¯»ÉÖе¯ÐÔÊÆÄܲ»±ä£¬Ö»ÓÐÔÚBÓëAÅöײճºÏÔÚÒ»ÆðʱÓж¯ÄܵÄËðʧ
¡÷E=Eqd-
1
2
?
2m¦Ô¡ä2=0.6J                        
£¨2£©A¡¢B·¢ÉúÅöײʱ£¬AÏò×óÔ˶¯ÁËx£¬ËÙ¶ÈΪÁ㣻BÏòÓÒÔ˶¯ÁËd-x£¬ËÙ¶ÈΪ¦ÔB£¬Óɶ¯Äܶ¨ÀíÓУºEq£¨d-x£©=
1
2
mvB2
AºÍBÅöײ¹ý³Ì£¬¶¯Á¿Êغ㣬ÉèÅöºó¹²Í¬ËÙ¶ÈΪ¦Ô£¬Ôòm¦ÔB=2m¦Ô         
ÓÉÄÜÁ¿ÊغãÓУº
1
2
mvB2=¡÷E+
1
2
?2m?¦Ô¡ä2 
Ï߶Ϻó£¬AÏò×ó×ö¼òгÔ˶¯£¬¸Õ¿ªÊ¼ÎªÓÒ±ß×î´óλÒƵ㣬´Ëʱµ¯»ÉÉ쳤Ϊx1£¬ÅöײʱΪ×ó±ß×î´óλÒƵ㣬¿É¼û¡¡¡¡¡¡¡¡¡¡¡¡
x=2x1£¬
ÇÒ£ºk x1=Eq£»                                     
ÓÉÒÔÉϸ÷ʽ£¬´úÈëÊý¾Ý½âµÃ£ºx=0.04m£¬
k=500N/m?
´ð£º£¨1£©BÓëAÅöײ¹ý³ÌÖÐËðʧµÄ¶¯ÄÜΪ0.6J£®
£¨2£©µ¯»ÉµÄ¾¢¶ÈϵÊýΪ500N/m£®
µãÆÀ£º±¾Ì⿼²éÁ˶¯Á¿Êغ㶨ÂÉ¡¢ÄÜÁ¿Êغ㶨ÂÉ¡¢ºú¿Ë¶¨ÂɵÈ֪ʶ£¬×ÛºÏÐÔ½ÏÇ¿£¬¶ÔѧÉúµÄÄÜÁ¦ÒªÇó½Ï¸ß£¬Ðè¼ÓǿѵÁ·£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø