ÌâÄ¿ÄÚÈÝ
(Ñ¡ÐÞ3-4)
¢ÅÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ( )
A£®ÈôÓÃƵÂʸü¸ßµÄµ¥É«¹âÕÕÉäʱ£¬Í¬¼¶Å£¶Ù»·°ë¾¶½«»á±äС
B£®Ì«ÑôÄÜÕæ¿Õ²£Á§¹Ü²ÉÓöÆĤ¼¼ÊõÔö¼Ó͸Éä¹â£¬ÕâÊÇÀûÓÃÁ˹âµÄÑÜÉäÔÀí
C£®Ïà¶ÔÂÛÈÏΪÕæ¿ÕÖеĹâËÙÔÚ²»Í¬¹ßÐÔ²ÎÕÕϵÖÐÊDz»ÏàͬµÄ
D£®ºì¹âÓÉ¿ÕÆø½øÈëË®ÖУ¬²¨³¤±ä³¤¡¢ÑÕÉ«²»±ä
¢ÆÓÐÒ»Áмòгºá²¨ÔÚµ¯ÐÔ½éÖÊÖÐÑØxÖáÕý·½ÏòÒÔËÙÂÊv=10m/s´«²¥£¬Ä³Ê±¿ÌµÄ²¨ÐÎÈçͼËùʾ£¬¸Ã²¨µÄÖÜÆÚT= s£¬°Ñ´Ëʱ¿Ì×÷ΪÁãʱ¿Ì£¬ÖʵãAµÄÕñ¶¯·½³ÌΪy= m¡£
£¨3£©±»³ÆΪ¡°¹âÏËÖ®¸¸¡±µÄ»ªÒáÎïÀíѧ¼Ò¸ßï¿£¬ÓÉÓÚÔÚ¹âÏË´«ÊäÐÅÏ¢Ñо¿·½Ãæ×ö³öÁ˾޴ó¹±Ï×£¬ÓëÁ½Î»ÃÀ¹ú¿Æѧ¼Ò¹²»ñ2009Äêŵ±´¶ûÎïÀíѧ½±£®¹âÏËÓÉÄÚоºÍÍâÌ×Á½²ã×é³É£®Ä³¹âÏËÄÚоµÄÕÛÉäÂÊΪn1£¬ÍâÌ×µÄÕÛÉäÂÊΪn2£¬ÆäÆÊÃæÈçͼËùʾ£®ÔڸùâÏËÄÚоºÍÍâÌ×·Ö½çÃæÉÏ·¢ÉúÈ«·´ÉäµÄÁÙ½ç½ÇΪ600£¬Îª±£Ö¤´Ó¸Ã¹âÏËÒ»¶ËÈëÉäµÄ¹âÐźŶ¼²»»áͨ¹ýÍâÌס°Ð¹Â©¡±³öÈ¥£¬ÇóÄÚоµÄÕÛÉäÂÊn1µÄ×îСֵ£®
¢ÅA¡¡£¨2£©0.1 £0.5sin20¦Ðt
£¨3£©ÈçͼËùʾ£¬ÓÉÌâÒâÔÚÄÚоºÍÍâÌ×·Ö½çÃæÉÏÒª·¢ÉúÈ«·´É䣬µ±ÔÚ¶ËÃæÉϵÄÈëÉä½Çi×î´ó£¨£©Ê±£¬ÕÛÉä½ÇrÒ²×î´ó£¬ÔÚÄÚоÓëÍâÌ×·Ö½çÃæÉϵÄÈëÉä½Ç×îС£¬Èç´ËʱÈëÉä½ÇµÈÓÚÁÙ½ç½ÇÔòÇ¡Äܱ£Ö¤ÐźŲ»»áͨ¹ýÍâÌס°Ð¹Â©¡±
Õâʱ
µÃ
ÔÚ¶ËÃæÉÏʱ£¬ÓÉ
µÃn1=2
ËùÒÔ£¬µ±n1=2ʱÔÚËùÓÐÇé¿öÖдӶËÃæÈëÉäµ½¹âÏËÖеÄÐźÅÇ¡Äܶ¼²»»áͨ¹ýÍâÌ× ¡°Ð¹Â©¡±³öÈ¥£®