ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Èçͼ£¬³¤ÎªLµÄ´Ö²Ú³¤Ä¾°åˮƽ·ÅÖã¬ÔÚľ°åµÄA¶Ë·ÅÖÃÒ»¸öÖÊÁ¿ÎªmµÄСľ¿é£»ÏÖ»ºÂý̧¸ßA¶Ë£¬Ê¹Ä¾°åÒÔ×ó¶ËΪÖáת¶¯£®µ±Ä¾°åתµ½ÓëˮƽÃæµÄ¼Ð½ÇΪ¦Áʱ£¬Ð¡Îï¿é¿ªÊ¼»¬¶¯£¬´Ëʱֹͣת¶¯Ä¾°å£¬Ð¡Îï¿é»¬µ½µ×¶Ë£¬ÖØÁ¦¼ÓËÙ¶ÈΪg£®ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨ £©
A£®Õû¸ö¹ý³Ìľ°å¶ÔÎï¿é×ö¹¦´óÓÚÎï¿é»úеÄܵÄÔöÁ¿
B£®Õû¸ö¹ý³ÌÖ§³ÖÁ¦¶ÔÎï¿é×ö¹¦ÎªÁã
C£®Õû¸ö¹ý³Ìľ°å¶ÔÎï¿é×ö¹¦ÎªÁã
D£®Õû¸ö¹ý³ÌÖ§³ÖÁ¦¶ÔÎï¿é×ö¹¦ÎªmgLsin¦Á
¡¾´ð°¸¡¿D
¡¾½âÎö¡¿
ÊÔÌâ·ÖÎö£ºÕû¸ö¹ý³ÌÖУ¬¸ù¾Ý¹¦ÄÜÔÀíÖª£¬Ä¾°å¶ÔÎïÌå×ö¹¦µÈÓÚÎïÌå»úеÄܵÄÔö¼ÓÁ¿£»¹ÊA´íÎó£»Ä¾°åת¶¯µÄ¹ý³ÌÖУ¬Ö§³ÖÁ¦¶ÔÎï¿éÒª×ö¹¦£¬¹ÊB´íÎó£®Õû¸ö¹ý³ÌÖУ¬Îï¿éµÄ»úеÄܼõÉÙ£¬Óɹ¦ÄÜÔÀí¿ÉÖª£¬Ä¾°å¶ÔÎï¿é×ö¹¦²»ÎªÁ㣬¹ÊC´íÎó£®Îï¿éÔÚ»ºÂýÌá¸ß¹ý³ÌÖУ¬Óɶ¯Äܶ¨Àí¿ÉµÃ£ºWÖ§-mgLsin¦Á=0-0£¬ÔòÓÐÕû¸ö¹ý³ÌÖ§³ÖÁ¦¶ÔÎï¿é×ö¹¦ WÖ§=mgLsin¦Á£®¹ÊDÕýÈ·£®¹ÊÑ¡D£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿