ÌâÄ¿ÄÚÈÝ
£¨08ÄêÄϾ©ÊÐһģ£©£¨14·Ö£©Èçͼ£¨a£©Ëùʾ£¬ÔÚÕæ¿ÕÖУ¬°ë¾¶ÎªbµÄÐéÏßËùΧµÄÔ²ÐÎÇøÓòÄÚ´æÔÚÔÈÇ¿´Å³¡£¬´Å³¡·½ÏòÓëÖ½Ãæ´¹Ö±£®Ôڴų¡ÓÒ²àÓÐÒ»¶ÔƽÐнðÊô°åMºÍN£¬Á½°å¼ä¾àÀëҲΪb£¬°å³¤Îª2b£¬Á½°åµÄÖÐÐÄÏßO1O2Óë´Å³¡ÇøÓòµÄÔ²ÐÄOÔÚͬһֱÏßÉÏ£¬Á½°å×ó¶ËÓëO1Ò²ÔÚͬһֱÏßÉÏ£®
ÓÐÒ»µçºÉÁ¿Îª£«q¡¢ÖÊÁ¿ÎªmµÄ´øµçÁ£×Ó£¬ÒÔËÙÂÊv0´ÓÔ²ÖÜÉϵÄPµãÑØ´¹Ö±Óڰ뾶OO1²¢Ö¸ÏòÔ²ÐÄOµÄ·½Ïò½øÈë´Å³¡£¬µ±´ÓÔ²ÖÜÉϵÄO1µã·É³ö´Å³¡Ê±£¬¸øM¡¢N°å¼ÓÉÏÈçͼ£¨b£©Ëùʾµçѹu£®×îºóÁ£×Ó¸ÕºÃÒÔƽÐÐÓÚN°åµÄËٶȣ¬´ÓN°åµÄ±ßÔµ·É³ö£®²»¼ÆƽÐнðÊô°åÁ½¶ËµÄ±ßԵЧӦ¼°Á£×ÓËùÊܵÄÖØÁ¦£®
£¨1£©Çó´Å³¡µÄ´Å¸ÐӦǿ¶ÈB£»
£¨2£©Çó½»±äµçѹµÄÖÜÆÚTºÍµçѹU0µÄÖµ£»
£¨3£©Èôt = ʱ£¬½«¸ÃÁ£×Ó´ÓMN°åÓÒ²àÑØ°åµÄÖÐÐÄÏßO2O1£¬ÈÔÒÔËÙÂÊv0ÉäÈëM¡¢NÖ®¼ä£¬ÇóÁ£×ӴӴų¡ÖÐÉä³öµÄµãµ½PµãµÄ¾àÀ룮
½âÎö£º
£¨1£©Á£×Ó×ÔPµã½øÈë´Å³¡£¬´ÓO1µãˮƽ·É³ö´Å³¡£¬Ô˶¯µÄ°ë¾¶±ØΪb£¬¡¡¡£¨1·Ö£©
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£¨1·Ö£©
½âµÃ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£¨1·Ö£©
ÓÉ×óÊÖ¶¨Ôò¿ÉÖª£¬´Å³¡·½Ïò´¹Ö±Ö½ÃæÏòÍâ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£¨1·Ö£©
£¨2£©Á£×Ó×ÔO1µã½øÈëµç³¡£¬×îºóÇ¡ºÃ´ÓN°åµÄ±ßԵƽÐзɳö£¬ÉèÔ˶¯Ê±¼äΪt£¬Ôò
2b = v0t ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£¨1·Ö£©
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£¨1·Ö£©
t = nT£¨n£½1£¬2£¬¡£© ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£¨1·Ö£©
½âµÃ £¨n£½1£¬2£¬¡£© ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£¨1·Ö£©
£¨n£½1£¬2£¬¡£© ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£¨1·Ö£©
£¨3£©µ±t = Á£×ÓÒÔËÙ¶Èv0ÑØO2O1ÉäÈëµç³¡Ê±£¬Ôò¸ÃÁ£×ÓÇ¡ºÃ´ÓM°å±ßÔµÒÔƽÐÐÓÚ¼«°åµÄËÙ¶ÈÉäÈë´Å³¡£¬ÇÒ½øÈë´Å³¡µÄËÙ¶ÈÈÔΪv0£¬Ô˶¯µÄ¹ìµÀ°ë¾¶ÈÔΪb£®¡£¨2·Ö£©
Éè½øÈë´Å³¡µÄµãΪQ£¬À뿪´Å³¡µÄµãΪR£¬Ô²ÐÄΪO3£¬ÈçͼËùʾ£¬ËıßÐÎOQ O3RÊÇÁâÐΣ¬¹ÊO RQO3£® ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡£¨2·Ö£©
ËùÒÔP¡¢O¡¢RÈýµã¹²Ïߣ¬¼´PORΪԲµÄÖ±¾¶£®¼´PR¼äµÄ¾àÀëΪ2b£®¡¡¡£¨1·Ö£©