ÌâÄ¿ÄÚÈÝ
ÔÚ×ø±êÔµãµÄ²¨Ô´²úÉúÒ»ÁÐÑØxÖáÕý·½Ïò´«²¥µÄ¼òгºá²¨£¬²¨ËÙv=200m/s£¬ÒÑÖªt=0ʱ¿Ì£¬²¨¸ÕºÃ´«²¥µ½x=40m´¦£¬ÈçͼËùʾ£®ÔÚx=400m´¦ÓÐÒ»½ÓÊÕÆ÷£¨Í¼ÖÐδ»³ö£©£¬ÔòÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ£¨ £©
A£®²¨Ô´¿ªÊ¼Õñ¶¯Ê±·½ÏòÑØyÖḺ·½Ïò
B£®´Ót=0¿ªÊ¼¾0.15s£¬x=40mµÄÖʵãÔ˶¯µÄ·³ÌΪ0.6m
C£®½ÓÊÕÆ÷ÔÚt=2sʱ²ÅÄܽÓÊմ˲¨
D£®Èô²¨Ô´ÏòxÖáÕý·½ÏòÔ˶¯£¬½ÓÊÕÆ÷ÊÕµ½²¨µÄƵÂÊ¿ÉÄÜΪ9Hz
E.Èô¸Ã²¨ÓëÁíÒ»ÁÐƵÂÊΪ5HzÑØxÖḺ·½Ïò´«²¥µÄ¼òгºá²¨ÏàÓö£¬²»ÄܲúÉúÎȶ¨µÄ¸ÉÉæͼÑù
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿