£¨2009?ÄÏͨģÄ⣩²â»¬ÂÖ×éµÄ»úеЧÂÊ£¬¶¯»¬ÂÖµÄÖÊÁ¿Îªm£¬Èçͼ°²×°ºÃ»¬ÂÖ×飬¼ÇϹ³Âë¼°µ¯»É²âÁ¦¼ÆµÄλÖã¬À­¶¯µ¯»É²âÁ¦¼ÆʹÖØΪGµÄ¹³ÂëÉý¸ß£¬¶Á³öµ¯»É²âÁ¦¼ÆµÄʾÊýF£¬Óÿ̶ȳ߷ֱð²â³ö¹³Âë±»Ìá¸ßµÄ¸ß¶ÈhºÍµ¯»É²âÁ¦¼ÆÒƶ¯µÄ¾àÀës£¬¼Ç¼Êý¾Ý£®
£¨1£©ÊúÖ±ÏòÉÏÀ­¶¯µ¯»É²âÁ¦¼Æ£¬²»¿¼ÂÇÉþ×ÓµÄÉ쳤£¬µ¯»É²âÁ¦¼ÆÒƶ¯µÄ¾àÀëÓë¹³Âë±»ÌáÉýµÄ¸ß¶ÈµÄ¹ØϵÊÇs=
3
3
h£®
£¨2£©Óù«Ê½¦Ç=
Gh
(mg+G)h
¼ÆËã»úеЧÂʵÄÌõ¼þÊÇ
²»¼ÆÉþÖغÍĦ²Á
²»¼ÆÉþÖغÍĦ²Á
£¬Ëü±ÈÓù«Ê½¦Ç=
Gh
Fs
¼ÆËã³öµÄ½á¹û
Æ«´ó
Æ«´ó
£¨Ìî¡°Æ«´ó¡±¡°Æ«Ð¡¡±»ò¡°²»±ä¡±£©£®
£¨3£©±£³Ö´Ë×°Öò»±ä£®½«¹³ÂëÔö¼ÓΪ2G£¬»¬ÂÖ×éµÄ»úеЧÂʽ«
Ôö´ó
Ôö´ó
£®£¨Ìî¡°Ôö´ó¡±¡°¼õС¡±»ò¡°²»±ä¡±£©
·ÖÎö£º£¨1£©ÓÉͼ֪£¬³Ðµ£ÎïÖصÄÉþ×Ó¹ÉÊýn=3£¬Ôòs=3h£»
£¨2£©¦Ç=
Gh
(mg+G)h
£¬Ö»¿¼ÂǶ¯»¬ÂÖµÄÖØ£¬Ã»Óп¼ÂÇÉþÖغÍĦ²Á£»¦Ç=
Gh
Fs
£¬Í¬Ê±¿¼Âǵ½¶¯»¬ÂÖÖØ¡¢ÉþÖØ¡¢Ä¦²Á£¬ÓÐÓù¦²»±ä£¬ºóÕß×ܹ¦Ôö´ó£¬ËùÒÔºóÕß»úеЧÂÊƫС£®
£¨3£©»¬ÂÖ×éÒ»¶¨Ê±£¬Ôö´óÌáÉýÎïÌåµÄÖØ£¬ÓÐÓù¦ÔÚ×ܹ¦ÖбÈÖµÔö´ó£¬»úеЧÂÊÔö´ó£®
½â´ð£º½â£º£¨1£©ÓÉͼ֪£¬n=3£¬Ôòs=3h£»
£¨2£©¦Ç=
Gh
(mg+G)h
£¬×ܹ¦µÈÓÚÌáÉý¶¯»¬ÂÖºÍÖØÎï×öµÄ¹¦£¬Ìõ¼þ£º²»¿¼ÂÇÉþÖغÍĦ²Á£»
¦Ç=
Gh
Fs
£¬Í¬Ê±¿¼Âǵ½¶¯»¬ÂÖÖØ¡¢ÉþÖØ¡¢Ä¦²Á£»
Á½¸ö¹«Ê½ÖУ¬ÌáÆðÎïÌåʱÓÐÓù¦Ïàͬ£¬¸ù¾Ý¦Ç=
Gh
(mg+G)h
¼ÆËãʱ×ܹ¦Æ«Ð¡£¬»úеЧÂÊÆ«´ó£®
£¨3£©Í¬Ò»»¬ÂÖ×éÌáÆð¹³ÂëµÄÖØÔö¼Ó£¬¶îÍ⹦¼¸ºõ²»±ä£¬ÓÐÓù¦ÔÚ×ܹ¦µÄ±ÈÖµÔö´ó£¬ËùÒÔͬһ»¬ÂÖ×éÌáÆðµÄÎïÌåÔ½ÖØ£¬»úеЧÂÊÔ½¸ß£®
¹Ê´ð°¸Îª£º£¨1£©3£» £¨2£©²»¼ÆÉþÖغÍĦ²Á£¬Æ«´ó£» £¨3£©Ôö´ó£®
µãÆÀ£º»¬ÂÖ×éµÄ»úеЧÂʸúÌáÆðÎïÌåµÄÖØÁ¦¡¢ÉþÖØ¡¢Ä¦²Á¡¢¶¯»¬ÂÖÖØÓйأ¬¸úÎïÌåÉý¸ßµÄ¾àÀë¡¢ÌáÆðµÄËÙ¶ÈûÓйØϵ£¬¼ÆËãʱҪעÒâÌõ¼þ£»»¬ÂÖ×éÒ»¶¨Ê±£¬Ôö´óÌáÉýÎïÌåµÄÖØ£¬ÓÐÓù¦ÔÚ×ܹ¦ÖбÈÖµÔö´ó£¬»úеЧÂÊÉý¸ß£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2009?ÄÏͨģÄ⣩СÃ÷×øÔÚÐÐÊ»µÄÆû³µÉÏ£¬Óû¹À²âÇ°·½ËíµÀµÄ³¤¶È£®ËûÊÖ³ÖÃë±í£¬²¢½«Ãë±íÖ¸Õëµ÷Á㣮ÔÚÆû³µ¸Õ½øËìµÀʱ°´ÏÂÃë±í£¬¿ªÊ¼¼Æʱ£¬Æû³µ³öËíµÀ¿ÚʱÓÖ°´ÏÂÃë±í£¬Ê¾ÊýÈçͼËùʾ£¬ÈôÆû³µÍ¨¹ýËíµÀʱµÄƽ¾ùËÙ¶ÈÊÇ36km/h£¬ÓÉ´Ë¿ÉÖªÆû³µÍ¨¹ýËíµÀʱ¼äΪ
234
234
s£¬ËíµÀµÄ³¤¶ÈΪ
2340
2340
m£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2009?ÄÏͨģÄ⣩Èçͼ¼×Ëùʾ£¬·ÅÔÚˮƽµØÃæÉϵÄÎïÌ壬Êܵ½·½Ïò²»±äµÄˮƽÀ­Á¦FµÄ×÷Óã¬FµÄ´óСÓëʱ¼ätµÄ¹ØϵÈçͼÒÒËùʾ£¬¶ÔÓ¦µÄÎïÌåÔ˶¯ËÙ¶ÈvÓëʱ¼ätµÄ¹ØϵÈçͼ±ûËùʾ£¬·ÖÎöͼÏó¿ÉÖª£¬µ±t=1sʱ£¬ÎïÌåÊܵ½µÄĦ²ÁÁ¦Îª
2
2
N£¬µ±t=3sʱ£¬ÎïÌåÊܵ½µÄĦ²ÁÁ¦Îª
4
4
N£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2009?ÄÏͨģÄ⣩ijͬѧÔÚ̽¾¿µ¯»ÉµÄÌصãʱ£¬µÃ³öÁ˵¯»ÉµÄ³¤¶ÈÓ뵯»ÉÊܵ½µÄÀ­Á¦µÄ¹ØϵÈçͼ£¬Çë»Ø´ðÏÂÁÐÎÊÌ⣺
£¨1£©Õâ¸ùµ¯»ÉµÄÔ­³¤ÊÇ
2
2
cm£»
£¨2£©µ¯»ÉÔÚÊܵ½6NµÄÀ­Á¦Ê±£¬µ¯»É±ÈÔ­À´É쳤ÁË
6
6
cm£¬´Ëʱµ¯»É¾ßÓÐ
µ¯ÐÔÊÆ
µ¯ÐÔÊÆ
ÄÜ£®
£¨3£©·ÖÎöͼÏó¼°ÓйØÊý¾Ý£¬Äã¿ÉµÃ³öµÄ½áÂÛÊÇÔÚÒ»¶¨·¶Î§ÄÚ£¬µ¯»ÉµÄÉ쳤Á¿ÓëÀ­Á¦³É
Õý
Õý
±È£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2009?ÄÏͨģÄ⣩Èçͼ£¬Íù±£ÎÂÆ¿ÖÐ×°Èë´ó°ëÆ¿¿ªË®£¬¸ÇÉÏÈíľÈûºó£¬¹Û²ìµ½Ä¾ÈûºÜÈÝÒ×ÌøÆð£¬Ì½¾¿ÆäÔ­Òò£¬Ò»ÊÇÆ¿ÄÚË®
Æû»¯
Æû»¯
£¨ÌîÎï̬±ä»¯£©³ÉË®ÕôÆø£¬¶þÊÇÆ¿ÄÚÆøÌåÊÜÈÈÅòÕÍ£¬Ê¹Æ¿ÄÚÆøѹ
´óÓÚ
´óÓÚ
£¨´óÓÚ/СÓÚ/µÈÓÚ£©Íâ½çÆøѹ£»µ«µÚ¶þÌìÓÖ»á³öÏÖ½ÏÄѰγöľÈûµÄÏÖÏó£¬ÕâÊÇÒòΪ
Æ¿ÄÚÆøѹ½µµÍ£¬Ð¡ÓÚÍâ½çµÄ´óÆøѹ
Æ¿ÄÚÆøѹ½µµÍ£¬Ð¡ÓÚÍâ½çµÄ´óÆøѹ
£®

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸