ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÈçͼËùʾ£¬ÓÐÒ»¶ÔƽÐнðÊô°å£¬°å¼ä¼ÓÓк㶨µçѹ£»Á½°å¼äÓÐÔÈÇ¿´Å³¡£¬´Å¸ÐӦǿ¶È´óСΪB0£¬·½Ïò´¹Ö±ÓÚÖ½ÃæÏòÀï¡£½ðÊô°åÓÒÏ·½ÒÔMN¡¢PQΪÉÏ¡¢Ï±߽磬MPΪ×ó±ß½çµÄÇøÓòÄÚ£¬´æÔÚ´¹Ö±Ö½ÃæÏòÍâµÄÔÈÇ¿´Å³¡£¬´Å³¡¿í¶ÈΪd£¬MNÓëϼ«°åµÈ¸ß£¬MPÓë½ðÊô°åÓÒ¶ËÔÚͬһÊúÖ±ÏßÉÏ¡£Ò»µçºÉÁ¿Îªq¡¢ÖÊÁ¿ÎªmµÄÕýÀë×Ó£¬ÒÔ³õËÙ¶Èv0ÑØƽÐÐÓÚ½ðÊô°åÃæ¡¢´¹Ö±ÓÚ°å¼ä´Å³¡µÄ·½Ïò´ÓAµãÉäÈë½ðÊô°å¼ä£¬²»¼ÆÀë×ÓµÄÖØÁ¦¡£
(1)ÒÑÖªÀë×ÓÇ¡ºÃ×öÔÈËÙÖ±ÏßÔ˶¯£¬Çó½ðÊô°å¼äµç³¡Ç¿¶ÈµÄ´óС£»
(2)Èô³·È¥°å¼ä´Å³¡B0£¬ÒÑÖªÀë×ÓÇ¡ºÃ´Óϼ«°åµÄÓÒ²à±ßÔµÉä³öµç³¡£¬·½ÏòÓëˮƽ·½Ïò³É30¡ã½Ç£¬ÇóAµãÀëϼ«°åµÄ¸ß¶È£»
(3)ÔÚ(2)µÄÇéÐÎÖУ¬ÎªÁËʹÀë×Ó½øÈë´Å³¡Ô˶¯ºó´Ó±ß½çMPµÄPµãÉä³ö£¬´Å³¡µÄ´Å¸ÐӦǿ¶ÈBӦΪ¶à´ó£¿
¡¾´ð°¸¡¿(1) (2) (3)
¡¾½âÎö¡¿ (1)Éè°å¼äµÄµç³¡Ç¿¶ÈΪE£¬Àë×Ó×öÔÈËÙÖ±ÏßÔ˶¯£¬Êܵ½µÄµç³¡Á¦ºÍÂåÂ××ÈÁ¦Æ½ºâ£¬ÓÐ
qE£½qv0B0
½âµÃE£½v0B0¡£
(2)ÉèAµãÀëϼ«°åµÄ¸ß¶ÈΪh£¬Àë×ÓÉä³öµç³¡Ê±µÄËÙ¶ÈΪv£¬¸ù¾Ý¶¯Äܶ¨Àí£¬µÃ
qEh£½mv2£mv02
Àë×ÓÔڵ糡ÖÐ×öÀàƽÅ×Ô˶¯£¬Ë®Æ½·½Ïò×öÔÈËÙÔ˶¯£¬ÓÐ
½âµÃ
(3)ÉèÀë×Ó½øÈë´Å³¡ºó×öÔÈËÙÔ²ÖÜÔ˶¯µÄ°ë¾¶Îªr£¬¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉ£¬µÃ
Óɼ¸ºÎ¹ØϵµÃ£½rcos 30¡ã
½âµÃ