ÌâÄ¿ÄÚÈÝ
ÈçͼËùʾ£¬°å³¤ÎªL£¬°åµÄB¶Ë¾²Ö¹·ÅÓÐÖÊÁ¿ÎªmµÄСÎïÌ壬ÎïÌåÓë°åµÄ¶¯Ä¦²ÁÒòÊýΪ¦Ì.¿ªÊ¼Ê±°åˮƽ£¬ÔÚ»ºÂýת¹ýÒ»¸öС½Ç¶È¦ÁµÄ¹ý³ÌÖУ¬Ð¡ÎïÌå±£³ÖÓë°åÏà¶Ô¾²Ö¹£¬ÔòÔÚÕâ¸ö¹ý³ÌÖУº( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241250561663222.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241250561663222.png)
A£®Ä¦²ÁÁ¦¶ÔСÎïÌå×ö¹¦Îª¦ÌmgLcos¦Á(1£cos¦Á) |
B£®Ä¦²ÁÁ¦¶ÔСÎïÌå×ö¹¦ÎªmgLsin¦Á(1£cos¦Á) |
C£®µ¯Á¦¶ÔСÎïÌå×ö¹¦ÎªmgLcos¦Ásin¦Á |
D£®°å¶ÔСÎïÌå×ö¹¦ÎªmgLsin¦Á |
D
»ºÂýÔ˶¯¹ý³ÌÖУ¬ÈκÎʱ¿Ì¶¼´¦ÓÚƽºâ״̬£¬ËùÒÔºÏÍâÁ¦×öµÄ¹¦ÎªÁ㣬ÖØÁ¦×ö¸º¹¦£¬´óСΪmgLsin¦Á£¬Ä¦²ÁÁ¦Ê¼ÖÕ¸úÔ˶¯·½Ïò´¹Ö±£¬¹Ê²»×ö¹¦£¬ËùÒÔµ¯Á¦×öÕý¹¦£¬¸úÖØÁ¦×ö¹¦´óСÏàͬ£¬Ò²ÎªmgLsin¦Á£¬ËùÒÔD¶Ô
¹ÊÓ¦¸ÃÑ¡D
¹ÊÓ¦¸ÃÑ¡D
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿