ÌâÄ¿ÄÚÈÝ
±±¾©Ê±¼ä2011Äê3ÔÂ11ÈÕ£¬ÈÕ±¾±¾Öݵº¸½½üº£Óò·¢ÉúÀïÊÏ9.0¼¶µØÕð£¬Ñо¿²¨¶¯¶ÔÔ¤±¨µØÕðÓÐÖØÒª×÷Óá£Í¼¼×ΪһÁмòгºá²¨ÔÚt=0.10sʱ¿ÌµÄ²¨ÐÎͼ£¬PÊÇƽºâλÖÃΪx="1" m´¦µÄÖʵ㣬QÊÇƽºâλÖÃΪx="4" m´¦µÄÖʵ㣬ͼÒÒΪÖʵãQµÄÕñ¶¯Í¼Ïó£¬Ôò
A£®t=0.05sʱ£¬ÖʵãQµÄ¼ÓËٶȴﵽÕýÏò×î´ó |
B£®t=0.15sʱ£¬ÖʵãPµÄÔ˶¯·½ÏòÑØyÖḺ·½Ïò |
C£®´Ót=0.10sµ½t=0.25s£¬¸Ã²¨ÑØxÖáÕý·½Ïò´«²¥ÁË6 m |
D£®´Ót=0.10sµ½t=0.25s£¬ÖʵãPͨ¹ýµÄ·³ÌΪ30cm |
B
½âÎö
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
±±¾©Ê±¼ä2011Äê3ÔÂ11ÈÕ13ʱ46·Ö26Ã룬ÈÕ±¾ÔÚÎ÷̫ƽÑó¹ú¼Êº£Óò·¢ÉúÀïÊÏ9.0¼¶µØÕð£¬ÃÀ¹úº½Ìì¾ÖµØÇòÎïÀíѧ¼ÒÀí²éµÂ?¸ñÂÞ˹ָ³ö£¬ÒòµØÕðµ¼ÖµØÇò×Ôת¿ìÁË1.6¦Ìs£¨1sµÄ°ÙÍò·ÖÖ®Ò»£©£¬Í¨¹ýÀíÂÛ·ÖÎö£¨µØÇòÖÊÁ¿ºÍ°ë¾¶¾ùÈÏΪ²»±ä£©ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A¡¢µØÇò³àµÀÉÏÎïÌåµÄÖØÁ¦ÂÔ±ä´ó | B¡¢µÚÒ»ÓîÖæËÙ¶ÈÂÔ¼õС | C¡¢µØÇòͬ²½ÎÀÐǵĸ߶ÈÂÔµ÷С | D¡¢ÔËÔØ»ð¼ý³É¹¦·¢Éä¸÷ÖÖº½ÌìÌåʱÆä×îСÄÜÁ¿ÂÔÔö¼Ó |