ÌâÄ¿ÄÚÈÝ

ÈçͼËùʾ£¬ÖÊÁ¿M = 1kgµÄľ°å¾²Ö¹ÔÚ´Ö²ÚµÄˮƽµØÃæÉÏ£¬Ä¾°åÓëµØÃæ¼äµÄ¶¯Ä¦²ÁÒòÊý¦Ì1=0.1£¬ÔÚľ°åµÄ×ó¶Ë·ÅÖÃÒ»¸öÖÊÁ¿m=1kg¡¢´óС¿ÉÒÔºöÂÔµÄÌú¿é£¬Ìú¿éÓëľ°å¼äµÄ¶¯Ä¦²ÁÒòÊý¦Ì2=0.4£¬È¡g=10m/s2£¬ÊÔÇó£º

£¨1£©Èôľ°å³¤L=1m£¬ÔÚÌú¿éÉϼÓÒ»¸öˮƽÏòÓҵĺãÁ¦F=8N£¬¾­¹ý¶à³¤Ê±¼äÌú¿éÔ˶¯µ½Ä¾°åµÄÓÒ¶Ë£¿

£¨2£©ÈôÔÚľ°å£¨×ã¹»³¤£©µÄÓÒ¶ËÊ©¼ÓÒ»¸ö´óС´ÓÁ㿪ʼÁ¬ÐøÔö¼ÓµÄˮƽÏò×óµÄÁ¦F£¬Í¨¹ý·ÖÎöºÍ¼ÆËãºó£¬ÇëÔÚͼÖл­³öÌú¿éÊܵ½µÄĦ²ÁÁ¦fËæÀ­Á¦F´óС±ä»¯µÄͼÏñ£®

 

 

 

 

 

 

 

 

 

£¨1£©Ñо¿Ä¾¿ém

F£­¦Ì2mg=ma1                                          ¡­¡­¡­¡­2·Ö

Ñо¿Ä¾°åM

¦Ì2mg£­¦Ì1£¨mg£«Mg£©=Ma2                                ¡­¡­¡­¡­3·Ö

L=a1t2£­a2t2                                         ¡­¡­¡­¡­2·Ö

½âµÃ£ºt=1s                                             ¡­¡­¡­¡­2·Ö

£¨2£©µ±F¡Ü ¦Ì1£¨mg+Mg£©Ê±£¬f=0N                         ¡­¡­¡­¡­2·Ö

µ±¦Ì1£¨mg+Mg£©<F¡Ü10Nʱ£¬M¡¢mÏà¶Ô¾²Ö¹

ÔòÓУºF£­¦Ì1£¨mg+Mg£©=£¨m+M£©a                        ¡­¡­¡­¡­1·Ö

f=ma

¼´£ºf=£­1£¨N£©                                      ¡­¡­¡­¡­2·Ö

µ±10N <Fʱ£¬mÏà¶ÔM»¬¶¯£¬´ËʱĦ²ÁÁ¦f=¦Ì2mg=4N       ¡­¡­¡­¡­2·Ö

                                                                         ¡­¡­¡­¡­2·Ö

 

 

 

 

 

 

½âÎö:ÂÔ

 

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

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

¾«Ó¢¼Ò½ÌÍø