±´±´ºÍ¾§¾§ÔÚ̽¾¿Å£¶ÙµÚ¶þ¶¨ÂɵĹý³ÌÖзֱð²ÉÓÃÁËÒÔÏ·½°¸£ºÁ½È˶¼ÔÚˮƽ×ÀÃæÉÏ·ÅÉÏÒ»¶Ë´øÓж¨»¬Âֵij¤Ä¾°å£¬½«ÏàͬÖÊÁ¿µÄ»¬¿é·ÅÔÚľ°åÉϺ󣬱´±´ÔÚ»¬¿éÉÏÓÃÉþ×ÓÁ¬½ÓÖØÎïA£»¾§¾§ÔòÖ±½ÓÔÚ»¬¿éÉÏÊ©¼ÓÊúÖ±ÏòϵÄÀ­Á¦F£®ÎïÌåAÊܵÄÖØÁ¦ºÍÀ­Á¦F´óСÏàͬ£¬Èçͼ1Ëùʾ£®²»¼ÆÎïÌåÓ볤ľ°å¼äµÄĦ²Á£¬Ò²²»¼ÆÉþµÄÖÊÁ¿¼°ÉþÓ뻬ÂÖµÄĦ²Á£¬Èôm1Ô˶¯µÄ¼ÓËÙ¶ÈΪa1£¬m2Ô˶¯µÄ¼ÓËÙ¶ÈΪa2£¬ÄÇô£º

£¨1£©a1ºÍa2µÄ´óС¹ØϵÊÇ
a1£¼a2
a1£¼a2
£»
£¨2£©ÔÚÉÏÃæµÄ̽¾¿¹ý³ÌÖУ¬ÈôÎïÌåÓ볤ľ°å¼äµÄĦ²Á²»ÄܺöÂÔ£¬±´±´µÄ·½°¸ÖÐÈçºÎ²ÅÄܽ«ÊµÑéÎó²î¼õС£¬ÇëÄãÖÁÉÙ˵³öÁ½Ìõ£º¢Ù
½«Ä¾°åµÄ×ó¶Ëµæ¸ßÒÔƽºâĦ²ÁÁ¦
½«Ä¾°åµÄ×ó¶Ëµæ¸ßÒÔƽºâĦ²ÁÁ¦
£¬¢Ú
Èû¬¿éµÄÖÊÁ¿Ô¶ÈËÓÚÀ­ÉþµÄÖØÎïµÄÖÊÁ¿
Èû¬¿éµÄÖÊÁ¿Ô¶ÈËÓÚÀ­ÉþµÄÖØÎïµÄÖÊÁ¿
£®
£¨3£©Èô±´±´Í¨¹ý¸Ä±äÀ­ÉþµÄÖØÎïAµÄÖÊÁ¿½øÐжà´ÎʵÑ飬²¢¸ù¾Ý¼Ç¼µÄʵÑéÊý¾ÝÃè³öÈçͼ2ËùʾµÄF-aͼÏó£¬Ôò¸ÃͼÏó±íÃ÷±´±´ÊµÑéÖпÉÄÜ´æÔÚµÄÎÊÌâÊÇ
ûÓÐƽºâ»¬¿éÓëľ°å¼äµÄĦ²ÁÁ¦
ûÓÐƽºâ»¬¿éÓëľ°å¼äµÄĦ²ÁÁ¦
£®
·ÖÎö£º¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÁз½³Ì±íʾ³öÁ½¸öľ¿éµÄ¼ÓËÙ¶ÈÈ»ºó±È½Ï´óС£»
С³µÔÚˮƽ·½ÏòÉÏÊÜÉþµÄÀ­Á¦ºÍĦ²ÁÁ¦£¬ÏëÓù³ÂëµÄÖØÁ¦±íʾС³µÊܵ½µÄºÏÍâÁ¦£¬Ê×ÏÈÐèҪƽºâĦ²ÁÁ¦£»Æä´ÎÒªÏëÓù³ÂëµÄÖØÁ¦±íʾС³µÊܵ½µÄºÏÍâÁ¦£¬±ØÐëÒªÂú×ã¹³ÂëµÄÖÊÁ¿Ô¶Ð¡ÓÚС³µµÄ×ÜÖÊÁ¿£®
ÓÉF-aͼÏóÖªÀ­Á¦F´ïµ½Ò»¶¨Öµºó²Å¿ªÊ¼ÓмÓËٶȣ®
½â´ð£º½â£º£¨1£©¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉ£ºm1Ô˶¯µÄ¼ÓËÙ¶ÈΪa1=
GA
m1+mA

m2Ô˶¯µÄ¼ÓËÙ¶ÈΪa2=
F
m2

F=GA£¬¹Êa1£¼a2£»
£¨2£©Ð¡³µÔÚˮƽ·½ÏòÉÏÊÜÉþµÄÀ­Á¦ºÍĦ²ÁÁ¦£¬ÏëÓù³ÂëµÄÖØÁ¦±íʾС³µÊܵ½µÄºÏÍâÁ¦£¬Ê×ÏÈÐèҪƽºâĦ²ÁÁ¦£»
ÉèÉþ×ÓÉÏÀ­Á¦ÎªF£¬¶ÔС³µ¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÓУº
F=Ma    ¢Ù
¹³ÂëÓУºmg-F=ma   ¢Ú
F=
mg
M+m
?M=
mg
1+
m
M

ÓÉ´Ë¿ÉÖªµ±M£¾£¾mʱ£¬¹»ÂëµÄÖØÁ¦µÈÓÚÉþ×ÓµÄÀ­Á¦¼´ÎªÐ¡³µÊǺÏÍâÁ¦£®
¹ÊΪÁ˼õСÎó²î²ÉÈ¡µÄ´ëÊ©ÓТٽ«Ä¾°åµÄ×ó¶Ëµæ¸ßÒÔƽºâĦ²ÁÁ¦£»¢ÚÈû¬¿éµÄÖÊÁ¿Ô¶ÈËÓÚÀ­ÉþµÄÖØÎïµÄÖÊÁ¿£»¢Û¶à´Î²âÁ¿È¡Æ½¾ùÖµµÈµÈ£®
£¨3£©ÓÉF-aͼÏóÖªÀ­Á¦F´ïµ½Ò»¶¨Öµºó²Å¿ªÊ¼ÓмÓËٶȣ¬ËµÃ÷±´±´ÊµÑéÖпÉÄÜ´æÔÚµÄÎÊÌâÊÇ£ºÃ»ÓÐƽºâ»¬¿éÓëľ°å¼äµÄĦ²ÁÁ¦£®
¹Ê´ð°¸Îª£º£¨1£©a1£¼a2£»£¨2£©¢Ù½«Ä¾°åµÄ×ó¶Ëµæ¸ßÒÔƽºâĦ²ÁÁ¦£»¢ÚÈû¬¿éµÄÖÊÁ¿Ô¶ÈËÓÚÀ­ÉþµÄÖØÎïµÄÖÊÁ¿£»¢Û¶à´Î²âÁ¿È¡Æ½¾ùÖµµÈµÈ£®
£¨3£©Ã»ÓÐƽºâ»¬¿éÓëľ°å¼äµÄĦ²ÁÁ¦£®
µãÆÀ£ºÒªÃ÷È·´ËÌâÔÚÑéÖ¤ºÏÍâÁ¦µÄ¹¦Ó붯Äܱ仯¼äµÄ¹ØϵÖÐÓõ½µÄÔ­Àí£¬Î§ÈÆʵÑéÔ­Àí£¬Ã÷ȷʵÑéÄ¿µÄ£¬¸ù¾ÝÏàÓ¦µÄÎïÀí¹æÂÉ¿ÉÖªÐèÒª²âÁ¿µÄÎïÀíÁ¿¼°ÊµÑéʱµÄ×¢ÒâÊÂÏ
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨8·Ö£©±´±´ºÍ¾§¾§ÔÚ̽¾¿Å£¶ÙµÚ¶þ¶¨ÂɵĹý³ÌÖзֱð²ÉÓÃÁËÒÔÏ·½°¸£ºÁ½È˶¼ÔÚˮƽ×ÀÃæÉÏ·ÅÉÏÒ»¶Ë´øÓж¨»¬Âֵij¤Ä¾°å£¬½«ÏàͬÖÊÁ¿µÄ»¬¿é·ÅÔÚľ°åÉϺ󣬱´±´ÔÚ»¬¿éÉÏÓÃÉþ×ÓÁ¬½ÓÖØÎïA£»¾§¾§ÔòÖ±½ÓÔÚ»¬¿éÉÏÊ©¼ÓÊúÖ±ÏòϵÄÀ­Á¦F¡£ÎïÌåAÊܵÄÖØÁ¦ºÍÀ­Á¦F´óСÏàͬ£¬ÈçͼËùʾ¡£²»¼ÆÎïÌåÓ볤ľ°å¼äµÄĦ²Á£¬Ò²²»¼ÆÉþµÄÖÊÁ¿¼°ÉþÓ뻬ÂÖµÄĦ²Á£¬Èôm1Ô˶¯µÄ¼ÓËÙ¶ÈΪa1£¬m2Ô˶¯µÄ¼ÓËÙ¶ÈΪa2£¬ÄÇô£º

(1) a1ºÍa2µÄ´óС¹ØϵÊÇ                £»

(2)ÔÚÉÏÃæµÄ̽¾¿¹ý³ÌÖУ¬ÈôÎïÌåÓ볤ľ°å¼äµÄĦ²Á²»ÄܺöÂÔ£¬±´±´µÄ·½°¸ÖÐÈçºÎ²ÅÄܽ«ÊµÑéÎó²î¼õС£¬ÇëÄãÖÁÉÙ˵³öÁ½Ìõ£º

¢Ù                                                                     £»

¢Ú                                                                     ¡£

(3)Èô±´±´Í¨¹ý¸Ä±äÀ­ÉþµÄÖØÎïAµÄÖÊÁ¿½øÐжà´ÎʵÑ飬²¢¸ù¾Ý¼Ç¼µÄʵÑéÊý¾ÝÃè³öÈçͼËùʾµÄF¨DaͼÏñ£¬Ôò¸ÃͼÏñ±íÃ÷±´±´ÊµÑéÖпÉÄÜ´æÔÚµÄÎÊÌâÊÇ           ¡£

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸