ÌâÄ¿ÄÚÈÝ
£¨10·Ö£©ÈçͼËùʾ£¬³¤ÎªL="6" m¡¢ÖÊÁ¿ÎªM="4" kgµÄ³¤Ä¾°å·ÅÖÃÓڹ⻬µÄˮƽÃæÉÏ£¬Æä×ó¶ËÓÐÒ»´óС¿ÉºöÂÔ¡¢ÖÊÁ¿Îªm="1" kgµÄÎï¿é£¬Îï¿éÓëľ°å¼äµÄ¶¯Ä¦²ÁÒòÊýΪ0.4£¬¿ªÊ¼Ê±Îï¿éÓëľ°å¶¼´¦ÓÚ¾²Ö¹×´Ì¬£¬ÏÖ¶ÔÎï¿éÊ©¼Ó·½ÏòˮƽÏòÓҵĺ㶨ÀÁ¦F="8" N£¬Ê¹Îï¿éÔÚľ°åÉÏ»¬¶¯ÆðÀ´£¬È¡g="10" m/s2.
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250005324814119.png)
Ç󣺢ÅÎï¿éºÍľ°åµÄ¼ÓËٶȴóС£»
¢ÆÎï¿é´Óľ°å×ó¶ËÔ˶¯µ½ÓҶ˾ÀúµÄʱ¼ä.
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250005324814119.png)
Ç󣺢ÅÎï¿éºÍľ°åµÄ¼ÓËٶȴóС£»
¢ÆÎï¿é´Óľ°å×ó¶ËÔ˶¯µ½ÓҶ˾ÀúµÄʱ¼ä.
¼û½âÎö
ÊÔÌâ·ÖÎö£º£¨1£©ÉèСÎï¿éµÄ¼ÓËÙ¶ÈΪ
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000532481315.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000532497708.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000532512731.png)
´úÈëÊý¾ÝµÃ£º
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000532528333.png)
Éèľ°åµÄ¼ÓËÙ¶ÈΪ
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000532543344.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000532575748.png)
´úÈëÊý¾ÝµÃ£º
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000532653367.png)
£¨2£©
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000532668806.png)
´úÈëÊý¾ÝµÃ£ºt=2s £¨2·Ö£©
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿