ÌâÄ¿ÄÚÈÝ
(6·Ö) Ò»Áмòгºá²¨ÔÚijʱ¿ÌµÄ²¨ÐÎͼÈçͼËùʾ£¬ÒÑ֪ͼÖÐÖʵãaµÄÆðÕñʱ¿Ì±ÈÖʵãbÑÓ³ÙÁË0£®5s£¬bºÍcÖ®¼äµÄ¾àÀëÊÇ5m£¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ__________£¨ÌîÕýÈ·´ð°¸±êºÅ¡£Ñ¡¶Ô1¸ö¸ø3·Ö£¬Ñ¡¶Ô2¸ö¸ø4·Ö£¬Ñ¡¶Ô3¸ö¸ø6·Ö£®Ã¿´íÑ¡Ò»¸ö¿Û3·Ö£¬×îµÍµÃ·ÖΪ0·Ö£©

E£®´ËÁв¨µÄ´«²¥·½ÏòΪÑØxÖḺ·½Ïò´«²¥

A£®´ËÁв¨µÄƵÂÊΪ1Hz |
B£®´ËÁв¨µÄ²¨ËÙΪ5m/s |
C£®´Ëʱ¿Ìa¡¢bÖʵãÖ®¼äµÄ¾àÀëÊÇ2.5m |
D£®´Ó´Ëʱ¿ÌÆ𣬾¹ý1.5sÖʵãcµ½´ïÖʵãaλÖà |
ABE
ÊÔÌâ·ÖÎö£ºÕñ¶¯´Óbµã´«µ½aµã£¬¾Àúʱ¼äΪ0.5s£¬Ôò²¨ÑØxÖḺÏò´«²¥£¬b¡¢c¼ä¾àˮƽ¾àÀëΪ5m£¬Ôò²¨³¤Îª5m£¬a¡¢b¼äˮƽ¾àÀëΪ2.5m£¬²¨ËÙΪ2.5/0.5=5m/s,ÖÜÆÚΪ1s£¬AÑ¡ÏîÕýÈ·£¬BÑ¡ÏîÕýÈ·£¬EÑ¡ÏîÕýÈ·£»´Ëʱ¿Ì£¬a¡¢bµÄˮƽ¾àÀëΪ2.5m£¬CÑ¡Ïî²Å´íÎó£»Öʵ㲻Ë沨ÑØ´«²¥·½ÏòǨÒÆ£¬DÑ¡Ïî´íÎó¡£

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿