ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿²â»ð³µËÙ¶È
Ìá³öÎÊÌâ ¹úÇì½ÚÆڼ䣬С·¼ºÍͬѧÃdz˻𳵴ÓÏå·®»ØÖØÇ죬µ±»ð³µÐÐÖÁÏåÓåÌú·´ó°ÍɽÀäË®ËíµÀÇ°Ò»¶Îƽֱ¹ìµÀʱ£¬Ð¡·¼¶ÔÆäËûͬѧ˵£º¡°ÎÒÃÇÄÜ·ñÓÃÊֱߵÄÆ÷²Ä¹À²â»ð³µµÄËٶȣ¿¡±
½øÐÐʵÑé Ðí¶àͬѧ²Î¼ÓÁ˲âÁ¿£¬ËûÃǸ÷×ÔµÄ×ö·¨ÈçÏ£º
(1)С·¼Ìýµ½ÁгµÉϹ㲥£º¡°Ç°·½s=3 km±ãÊÇ´ó°ÍɽÀäË®ËíµÀ¡£¡±Ç¡ºÃ´Ëʱ»ð³µÃùµÑ£¬Ð¡·¼²âµÃ¾tÃëºóÌýµ½´Ó´ó°Íɽ·´ÉäÀ´µÄ»ØÉùºó˵£º¡°ÎÒÒÑÄÜËã³ö»ð³µµÄËٶȡ£¡±
(2)×øÔÚ´°ÅÔµÄС¾ü²»¶¯ÉùÉ«£¬¿´×Å´°Íâÿ¸ôs=100 mµÄµçÏ߸ˣ¬²¢Êý×Å×Ô¼ºÂö²«Ìø¶¯µÄ´ÎÊý£¬Êý³öÿͨ¹ýÁ½¸ùµçÏ߸Ëʱ×Ô¼ºÂö²«Ìø¶¯ÁËN´Î£¬Ð¡¾üͻȻÐû²¼£º¡°ÎÒÒѲâ³ö»ð³µµÄËٶȡ£¡±ÉèС¾ü×Ô¼ºÆ½Ê±Ã¿·ÖÖÓÂö²«Ìø¶¯n´Î¡£
(3)СǿÅܵ½Áгµ¼ÝÊ»ÊÒ£¬»ØÀ´ºóЦ×Å˵£º¡°ÎÒÒÑÖªµÀÁ˻𳵵ÄËٶȡ£¡±
(4)С»Û¿´×Å×Ô¼ºµÄÊÖ±í£¬ÎÊÁËһϳËÎñԱÿ¸ùÌú¹ì³¤L£¬Êý³ötÃëÄÚÌú¹ìÏìÁËN´Î£¬Ð¡»Û˵×Ô¼ºµÄ·½·¨¿ÉÒÔ²â»ð³µµÄËٶȡ£
ʵÑé·½·¨½»Á÷
С·¼²âÁ¿Ëٶȵıí´ïʽ£º_____________£»Ð¡¾üµÄ²âÁ¿Ëٶȵıí´ïʽ£º___________ £»
Сǿ²âÁ¿·½·¨ÊÇ_____________________ £»Ð¡»ÛµÄ²âÁ¿·½·¨ÊÇ__________________ £»
¡¾´ð°¸¡¿¹Û²ìÁгµÉϵÄËٶȼƵÄʾÊýÖªµÀÁгµµÄËٶȵÄͨ¹ý¿´¼ÝÊ»ÊÒÀïµÄËÙ¶ÈÏÔʾ±íµÄʾÊýÖªµÀ»ð³µËٶȵĸù¾Ý
¡¾½âÎö¡¿tÃëÉùÒô´«²¥µÄ¾àÀësÉù=vÉùt£¬tÃëÁгµ×ߵľàÀës³µ=v³µt£¬
ÓÉÌâÒâ¿ÉÖª£ºsÉù+s³µ=2s£¬¼´£ºvÉùt + v³µt =2s£¬
ËùÒÔÁгµµÄËÙ¶ÈΪ£ºv³µ= ÆäÖÐs=3 000 m£¬v=340 m/s
£¨2£©Ð¡¾üÂö²«Ìø¶¯1´ÎµÄʱ¼ä: £¬Âö²«Ìø¶¯ÁËN´ÎµÄʱ¼ät=
ÿͨ¹ýÁ½¸ùµçÏ߸Ëͨ¹ýµÄ¾àÀëΪs=100 m£¬
ËùÒÔÁгµµÄËÙ¶ÈΪ£º
£¨3£©Ð¡Ç¿µÄ²âÁ¿·½·¨ÊÇ£º¹Û²ìÁгµÉϵÄËٶȼƵÄʾÊýÖªµÀÁгµµÄËٶȵģ»
£¨4£©Ð¡»ÛÊý³ötÃëÄÚÌú¹ìÏìÁËN´Î£¬±íʾ×ß¹ýµÄ·³ÌΪs=£¨N-1£©L£¬Ê±¼äΪt,ËùÒÔÁгµµÄËÙ¶ÈΪ£º
v³µ=
¡¾ÌâÄ¿¡¿Ð¡¸ÕÊÇ°àÉÏÓÐÃûµÄ¶ÌÅÜÔ˶¯Ô±¡£ÓÐÒ»Ì죬´ó¼ÒΪС¸ÕÅܲ½µÄËÙ¶ÈÊÇ·ñ±ÈСÁáÆï×ÔÐгµËٶȸü¿ìµÄÊÂÕùÂÛÆðÀ´£¬´ó¼Ò³³×ÅÒªÔÚ²Ù³¡ÉϽøÐбÈÈü¡£ÕýÔÚÕâʱ£¬Ð¡Áá˵£¬Èç¹û±ÈÈüʱ¼ä×ã¹»³¤£¬ÎÒµÄËٶȿ϶¨±ÈС¸Õ¿ì£»Èç¹û±ÈÈüµÄ¾àÀëÌ«¶Ì£¬ÎÒµÄËٶȿÉÄܱÈËûµÄÂý¡£
(1)СÁáËùÖ¸µÄËÙ¶ÈÊÇʲôËٶȣ¿
(2)ÇëÄãÉè¼ÆÒ»¸ö±ÈÈü·½°¸£¬À´Ö¤Ã÷СÁáÅÐ¶ÏµÄ¶Ô´í£»
(3)Èç¹ûС¸ÕÓëСÁáÒò¹Ê²»ÄÜͬʱµ½´ï±ÈÈü³¡µØ½øÐбÈÈü£¬ÕⳡËٶȵıȽϻ¹ÄܽøÐÐÂð£¿
(4)ÒÔÏÂÁ½±íÊÇÌåÓýÀÏʦΪС¸Õ¡¢Ð¡Áá²âÊԵijɼ¨±í£¬ÇëÄã·ÖÎö±íÖеÄÊý¾Ý£¬»Ø´ðÒÔÏÂÎÊÌ⣺
±í1£ºÐ¡¸ÕÅܲ½µÄ³É¼¨±í
·³Ì£¯m | 10 | 20 | 50 | 80 | 120 | 160 | 200 | 240 | 300 | 400 |
ʱ¼ä/s | 2.8 | 5.1 | 8.6 | 11.5 | 18.8 | 30.3 | 45.2 | 58.5 | 82.5 | 122.5 |
±í2£ºÐ¡ÁáÆï×ÔÐгµµÄ³É¼¨±í
·³Ì£¯m | 10 | 20 | 50 | 80 | 120 | 160 | 200 | 240 | 300 | 400 | |
ʱ¼ä/s | 5.0 | 7.5 | 10.0 | 15.0 | 26.0 | 34.2 | 42.0 | 50.0 | 62.0 | 82.0 | |
¢ÙÔÚ400 mÈ«³ÌÖУ¬Ð¡¸ÕºÍСÁáµÄƽ¾ùËٶȷֱðÊǶàÉÙ£¿
¢Ú´Ó±íÖпÉÒÔ¿´³ö£¬ÖÁÉÙÔÚ¶àÉÙ·³ÌÄÚ£¬Ð¡¸ÕµÄƽ¾ùËٶȱÈСÁáµÄƽ¾ùËٶȴó£¿
¢Û´Ó±íÖпÉÒÔ¿´³ö£®ÖÁÉÙÔÚ¶àÉÙÃëÒÔºó£¬Ð¡ÁáµÄƽ¾ùËٶȱÈС¸ÕµÄƽ¾ùËٶȴó£¿
¢ÜÎÒÃǰѱí¸ñÖÐÁ½¸öÏàÁÚµÄÊý¾ÝÖ®¼äµÄ·³Ì³ÆΪһ¸ö½×¶Î¡£ÎÊ£º´ÓÆðµã¿ªÊ¼£¬ÔÚÄÄÒ»¸ö
·¶ÎСÁáµÄËٶȵÚÒ»´Î³¬¹ýС¸ÕÔÚÕâ¸ö·¶ÎµÄËٶȣ¿