ÌâÄ¿ÄÚÈÝ
ÈçͼËùʾÊÇÒ»¸öÎïÀíÑÝʾʵÑ飬ËüÏÔʾ£ºÍ¼ÖÐ×ÔÓÉÏÂÂäµÄÎïÌåAºÍB¾·´µ¯ºó£¬BÄÜÉÏÉýµ½±È³õʼλÖøߵöàµÄµØ·½¡£AÊÇijÖÖ²ÄÁÏ×ö³ÉµÄʵÐÄÇò£¬ÖÊÁ¿m1="0.28" kg£¬ÔÚÆ䶥²¿µÄ°¼¿ÓÖвå×ÅÖÊÁ¿m2="0.10" kgµÄľ¹÷B. BÖ»ÊÇËÉËɵزåÔÚ°¼¿ÓÖУ¬Æä϶ËÓë¿Óµ×Ö®¼äÓÐС¿Õ϶¡£½«´Ë×°ÖôÓA϶ËÀëµØ°åµÄ¸ß¶ÈH="1.25" m´¦Óɾ²Ö¹ÊÍ·Å.ʵÑéÖУ¬A´¥µØºóÔÚ¼«¶Ìʱ¼äÄÚ·´µ¯£¬ÇÒÆäËٶȴóС²»±ä£»½Ó×Åľ¹÷BÍÑÀëÇòA¿ªÊ¼ÉÏÉý£¬¶øÇòAÇ¡ºÃÍ£ÁôÔڵذåÉÏ¡£Çóľ¹÷BÉÏÉýµÄ¸ß¶È.£¨ÖØÁ¦¼ÓËÙ¶Èg="10" m/s2£©![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241334347091270.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241334347091270.png)
4.05 m
±¾Ì⿼²é¶¯Á¿ÊغãµÄ˲¼äÎÊÌ⣬Ñо¿¶ÔÏóµÄÑ¡È¡ÖÁ¹ØÖØÒª£¬
¸ù¾ÝÌâÒ⣬AÅöµØ°åºó£¬·´µ¯ËٶȵĴóСv1µÈÓÚËüÏÂÂäµ½µØÃæʱËٶȵĴóС£¬
¼´ v1=
="5" m/s£¬£¨2·Ö£©
A¸Õ·´µ¯ºó£¬ËÙ¶ÈÏòÉÏ£¬Á¢¿ÌÓëÏÂÂäµÄBÅöײ£¬
ÅöÇ°BµÄËٶȣºv2=
="5" m/s¡££¨2·Ö£©
ÓÉÌâÒ⣬ÅöºóAËÙ¶ÈΪÁ㣬ÒÔv2¡ä±íʾBÉÏÉýµÄ³õËٶȣ¬
¸ù¾Ý¶¯Á¿Êغ㣬£¨ÒÔÏòÉÏΪÕý·½Ïò£©
m1v1£m2v2=m2v2¡ä£¬£¨2·Ö£©
µÃ v2¡ä="9" m/s¡££¨2·Ö£©
Áîh±íʾBÉÏÉýµÄ¸ß¶È£¬ÓÐ h=
="4.05" m£¨2·Ö£©
¸ù¾ÝÌâÒ⣬AÅöµØ°åºó£¬·´µ¯ËٶȵĴóСv1µÈÓÚËüÏÂÂäµ½µØÃæʱËٶȵĴóС£¬
¼´ v1=
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133434756498.png)
A¸Õ·´µ¯ºó£¬ËÙ¶ÈÏòÉÏ£¬Á¢¿ÌÓëÏÂÂäµÄBÅöײ£¬
ÅöÇ°BµÄËٶȣºv2=
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133434756498.png)
ÓÉÌâÒ⣬ÅöºóAËÙ¶ÈΪÁ㣬ÒÔv2¡ä±íʾBÉÏÉýµÄ³õËٶȣ¬
¸ù¾Ý¶¯Á¿Êغ㣬£¨ÒÔÏòÉÏΪÕý·½Ïò£©
m1v1£m2v2=m2v2¡ä£¬£¨2·Ö£©
µÃ v2¡ä="9" m/s¡££¨2·Ö£©
Áîh±íʾBÉÏÉýµÄ¸ß¶È£¬ÓÐ h=
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133434912565.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿