ÓÐÒ»ÖֽС°°¢ÌØÎäµÂ»ú¡±µÄ×°Ö㬿ÉÒÔÓÃÀ´Ñо¿³¬ÖغÍʧÖØÏÖÏó£¬ÆäÑо¿²½ÖèÈçÏ£ºÈçͼËùʾ£¬Ô­À´×óÓÒÁ½²à¶¼Ðü¹ÒÖÊÁ¿Îª2mµÄíÀÂ룬´Ëʱµ¯»É³ÓʾÊýΪ2mg£®ÈôÔÚÓÒ²àÐü¹ÒµÄíÀÂëÉÏÔÙÔö¼ÓÖÊÁ¿ÎªmµÄíÀÂ룬×ó²àíÀÂ뽫»ñµÃÏòÉϵļÓËٶȣ¬¿É¹Û²ìµ½µ¯»É³ÓÉϵÄʾÊý±ä´ó£¬×ó²àíÀÂë´¦ÓÚ³¬ÖØ״̬£»Èô½«ÓÒ²à¼õÉÙÒ»¸öÖÊÁ¿ÎªmíÀÂ룬×ó²àíÀÂ뽫ÏòϼÓËÙÔ˶¯£¬¿É¹Û²ìµ½µ¯»É³ÓÉϵÄʾÊý±äС£¬×ó²àíÀÂë´¦ÓÚʧÖØ״̬£®ÇëÎÊ£º
£¨1£©×ó²àíÀÂ볬ÖØ״̬ʱ£¬µ¯»É³ÓµÄ¶ÁÊýΪ¶àÉÙ£¿
£¨2£©×ó²àíÀÂëʧÖØ״̬ʱ£¬µ¯»É³ÓµÄ¶ÁÊýΪ¶àÉÙ£¿
·ÖÎö£ºµ±ÓÒ²àÔö¼ÓÒ»íÀÂëʱ£¬×ó²àíÀÂ볬ÖØ£¬ÓÒ²àíÀÂëʧÖØ£¬´Ëʱ·Ö±ð¶Ô×óÓÒÁ½²àíÀÂëÊÜÁ¦·ÖÎö£¬ÀûÓÃÅ£¶ÙµÚ¶þ¶¨Âɼ´¿É½â¾ö£¬Í¬ÀíÓÒ²à¼õÉÙÒ»íÀÂëʱ£¬Í¬ÑùÀûÓô˷¨¿É½â£®
½â´ð£º½â£º£¨1£©´¦ÓÚ³¬ÖØ״̬ʱ£¬
¶Ô×ó²àÎïÌåÊÜÁ¦·ÖÎöÓÉÅ£¶ÙµÚ¶þ¶¨ÂÉÖª
F-2mg=2ma
ͬÀí¶ÔÓÒ²àµÄÎïÌåÊÜÁ¦·ÖÎöÖª
3mg-F=3ma
ÁªÁ¢ÒÔÉ϶þʽ½âµÃF=2.4mg
£¨2£©´¦ÓÚʧÖØ״̬ʱ£¬¶Ô×ó²àÎïÌåÊÜÁ¦·ÖÎöÖª
2mg-F¡ä=2ma¡ä
¶ÔÓÒ²àµÄÎïÌåÊÜÁ¦·ÖÎöÖªF¡ä-mg=ma¡ä
ÁªÁ¢ÒÔÉ϶þʽ½âµÃF¡ä=
4
3
mg
´ð£º×ó²àíÀÂ볬ÖØ״̬ʱ£¬µ¯»É³ÓµÄ¶ÁÊýΪ2.4mg£¬×ó²àíÀÂëʧÖØ״̬ʱ£¬µ¯»É³ÓµÄ¶ÁÊýΪ
4
3
mg£®
µãÆÀ£º½â¾ö´ËÌâµÄ¹Ø¼üÊǽ«¶¨»¬ÂÖÁ½²à·Ö¿ª½øÐÐÊÜÁ¦·ÖÎö£¬ÀûÓÃÅ£¶ÙµÚ¶þ¶¨Âɼ´¿É½â¾ö´ËÀàÎÊÌ⣮
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

ÓÐÒ»ÖֽС°°¢ÌØÎäµÂ»ú¡±µÄ×°Ö㬿ÉÒÔÓÃÀ´Ñо¿³¬ÖغÍʧÖØÏÖÏó£¬ÆäÑо¿²½ÖèÈçÏ£ºÈçͼËùʾ£¬Ô­À´×óÓÒÁ½²à¶¼Ðü¹ÒÖÊÁ¿Îª2mµÄíÀÂ룬´Ëʱµ¯»É³ÓʾÊýΪ2mg£®ÈôÔÚÓÒ²àÐü¹ÒµÄíÀÂëÉÏÔÙÔö¼ÓÖÊÁ¿ÎªmµÄíÀÂ룬×ó²àíÀÂ뽫»ñµÃÏòÉϵļÓËٶȣ¬¿É¹Û²ìµ½µ¯»É³ÓÉϵÄʾÊý±ä´ó£¬×ó²àíÀÂë´¦ÓÚ³¬ÖØ״̬£»Èô½«ÓÒ²à¼õÉÙÒ»¸öÖÊÁ¿ÎªmíÀÂ룬×ó²àíÀÂ뽫ÏòϼÓËÙÔ˶¯£¬¿É¹Û²ìµ½µ¯»É³ÓÉϵÄʾÊý±äС£¬×ó²àíÀÂë´¦ÓÚʧÖØ״̬£®ÇëÎÊ£º
£¨1£©×ó²àíÀÂ볬ÖØ״̬ʱ£¬µ¯»É³ÓµÄ¶ÁÊýΪ¶àÉÙ£¿
£¨2£©×ó²àíÀÂëʧÖØ״̬ʱ£¬µ¯»É³ÓµÄ¶ÁÊýΪ¶àÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2010-2011ѧÄê¹ã¶«Ê¡½ÒÑôÊнҶ«ÏØÊ¢×ñÖÐѧ¸ßÈý£¨ÉÏ£©µÚ¶þ´ÎÔ¿¼ÎïÀíÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£ºÌî¿ÕÌâ

ÓÐÒ»ÖֽС°°¢ÌØÎäµÂ»ú¡±µÄ×°Ö㬿ÉÒÔÓÃÀ´Ñо¿³¬ÖغÍʧÖØÏÖÏó£¬ÆäÑо¿²½ÖèÈçÏ£ºÈçͼËùʾ£¬Ô­À´×óÓÒÁ½²à¶¼Ðü¹ÒÖÊÁ¿Îª2mµÄíÀÂ룬´Ëʱµ¯»É³ÓʾÊýΪ2mg£®ÈôÔÚÓÒ²àÐü¹ÒµÄíÀÂëÉÏÔÙÔö¼ÓÖÊÁ¿ÎªmµÄíÀÂ룬×ó²àíÀÂ뽫»ñµÃÏòÉϵļÓËٶȣ¬¿É¹Û²ìµ½µ¯»É³ÓÉϵÄʾÊý±ä´ó£¬×ó²àíÀÂë´¦ÓÚ³¬ÖØ״̬£»Èô½«ÓÒ²à¼õÉÙÒ»¸öÖÊÁ¿ÎªmíÀÂ룬×ó²àíÀÂ뽫ÏòϼÓËÙÔ˶¯£¬¿É¹Û²ìµ½µ¯»É³ÓÉϵÄʾÊý±äС£¬×ó²àíÀÂë´¦ÓÚʧÖØ״̬£®ÇëÎÊ£º
£¨1£©×ó²àíÀÂ볬ÖØ״̬ʱ£¬µ¯»É³ÓµÄ¶ÁÊýΪ¶àÉÙ£¿
£¨2£©×ó²àíÀÂëʧÖØ״̬ʱ£¬µ¯»É³ÓµÄ¶ÁÊýΪ¶àÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸