ÌâÄ¿ÄÚÈÝ
Ôڹ⻬µÄˮƽ×ÀÃæÉÏÓеȴóµÄÖÊÁ¿·Ö±ðΪM="0.6" kg£¬m="0.2" kgµÄÁ½¸öСÇò£¬Öмä¼Ð×ÅÒ»¸ö±»Ñ¹ËõµÄ¾ßÓÐEp="10.8" Jµ¯ÐÔÊÆÄܵÄÇᵯ»É£¨µ¯»ÉÓëÁ½Çò²»ÏàÁ¬£©£¬ÔÀ´´¦ÓÚ¾²Ö¹×´Ì¬.ÏÖͻȻÊͷŵ¯»É£¬ÇòmÍÑÀ뵯»Éºó»¬ÏòÓëˮƽÃæÏàÇС¢°ë¾¶ÎªR="0.425" mµÄÊúÖ±·ÅÖõĹ⻬°ëÔ²ÐιìµÀ£¬ÈçͼËùʾ.gÈ¡10 m/s2.ÔòÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£º
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250046127934617.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250046127934617.jpg)
A£®Çòm´Ó¹ìµÀµ×¶ËAÔ˶¯µ½¶¥¶ËBµÄ¹ý³ÌÖÐËùÊܺÏÍâÁ¦³åÁ¿´óСΪ3.4 N¡¤s |
B£®MÀ뿪Çᵯ»Éʱ»ñµÃµÄËÙ¶ÈΪ9m/s |
C£®Èô°ëÔ²¹ìµÀ°ë¾¶¿Éµ÷£¬ÔòÇòm´ÓBµã·É³öºóÂäÔÚˮƽ×ÀÃæÉϵÄˮƽ¾àÀëËæ¹ìµÀ°ë¾¶µÄÔö´ó¶ø¼õС |
D£®µ¯»Éµ¯¿ª¹ý³Ì£¬µ¯Á¦¶ÔmµÄ³åÁ¿´óСΪ1.8 N¡¤s |
AD
ÊÔÌâ·ÖÎö£º¾ÝÌâÒ⣬Óɶ¯Á¿Êغ㶨ÂÉ¿ÉÖª£º
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004612809666.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004612824542.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250046128401020.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004612856615.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004612871881.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250046129021013.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004612918632.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250046129341091.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿