ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÔÚ¾øÔµ´Ö²ÚµÄˮƽÃæÉÏÏà¾àΪ6LµÄA¡¢BÁ½´¦·Ö±ð¹Ì¶¨µçÁ¿²»µÈµÄÕýµçºÉ£¬Á½µçºÉµÄλÖÃ×ø±êÈçͼ£¨¼×£©Ëùʾ£¬ÒÑÖªB´¦µçºÉµÄµçÁ¿Îª+Q¡£Í¼£¨ÒÒ£©ÊÇABÁ¬ÏßÖ®¼äµÄµçÊƦÕÓëλÖÃxÖ®¼äµÄ¹ØϵͼÏñ£¬Í¼ÖÐx=LµãΪͼÏßµÄ×îµÍµã£¬x=-2L´¦µÄ×Ý×ø±ê¦Õ=¦Õ0£¬x=0´¦µÄ×Ý×ø±ê¦Õ= ¦Õ0£¬x=2L´¦µÄ×Ý×ø±ê¦Õ=
¦Õ0¡£ÈôÔÚx=-2LµÄCµãÓɾ²Ö¹ÊÍ·ÅÒ»¸öÖÊÁ¿Îªm¡¢µçÁ¿Îª+qµÄ´øµçÎï¿é£¨¿ÉÊÓΪÖʵ㣩£¬Îï¿éËæ¼´ÏòÓÒÔ˶¯¡£ Çó£º
£¨1£©¹Ì¶¨ÔÚA´¦µÄµçºÉµÄµçÁ¿QA £»
£¨2£©ÎªÁËʹСÎï¿éÄܹ»µ½´ïx=2L´¦£¬ÊÔÌÖÂÛСÎï¿éÓëˮƽÃæ¼äµÄ¶¯Ä¦²ÁÒòÊý¦ÌËùÂú×ãµÄÌõ¼þ£»
£¨3£©ÈôСÎï¿éÓëˮƽÃæ¼äµÄ¶¯Ä¦²ÁÒòÊý £¬Ð¡Îï¿éÔ˶¯µ½ºÎ´¦Ê±ËÙ¶È×î´ó£¿²¢Çó×î´óËÙ¶Èvm£»
£¨4£©ÊÔ»³ö¦ÌÈ¡Öµ²»Í¬µÄÇé¿öÏ£¬Îï¿éÔÚABÖ®¼äÔ˶¯´óÖµÄËÙ¶È-ʱ¼ä¹ØϵͼÏñ¡£
¡¾´ð°¸¡¿£¨1£© £¨2£©
(3)x=0ʱËÙ¶È×î´ó£¬
(4)
¡¾½âÎö¡¿ÊÔÌâ·ÖÎö£º£¨1£©ÓÉͼ£¨ÒÒ£©µÃ£¬x=LµãΪͼÏßµÄ×îµÍµã£¬ÇÐÏßбÂÊΪÁ㣬¼´ºÏ³¡Ç¿E=0
ËùÒÔµÃ
½â³ö
£¨2£©Îï¿éÏÈ×ö¼ÓËÙÔ˶¯ÔÙ×ö¼õËÙÔ˶¯£¬µ½´ïx=2L´¦ËÙ¶Èvt¡Ý0
´Óx=-2Lµ½x=2L¹ý³ÌÖУ¬Óɶ¯Äܶ¨ÀíµÃ£º
£¬¼´
½âµÃ
£¨3£©Ð¡Îï¿éÔ˶¯ËÙ¶È×î´óʱ£¬µç³¡Á¦ÓëĦ²ÁÁ¦µÄºÏÁ¦ÎªÁ㣬Éè¸ÃλÖÃÀëAµãµÄ¾àÀëΪlA
Ôò£º
½âµÃlA=3L£¬¼´Ð¡Îï¿éÔ˶¯µ½x=0ʱËÙ¶È×î´ó¡£
СÎï¿é´Óx=-2LÔ˶¯µ½x=0µÄ¹ý³ÌÖУ¬Óɶ¯Äܶ¨ÀíµÃ£º
´úÈëÊý¾Ý£º
½âµÃ
£¨4£©»³öÒ»ÖÖ¿ÉÄܵĵÃ1·Ö
![](http://thumb2018.1010pic.com/images/loading.gif)