ÈçͼËùʾ£¬ AB¶ÎΪһ°ë¾¶R=0.2mµÄ¹â»¬Ô²ÐιìµÀ£¬EFΪһÇã½ÇΪ30¡ãµÄ¹â»¬Ð±Ãæ,бÃæÉÏÓÐÒ»ÖÊÁ¿Îª0.1KgµÄ±¡Ä¾°åCD, ľ°åµÄ϶ËDÀëбÃæµ×¶ËµÄ¾àÀëΪ15m,¿ªÊ¼Ê±Ä¾°å±»Ëø¶¨.Ò»ÖÊÁ¿Ò²Îª0.1KgµÄÎï¿é´ÓAµãÓɾ²Ö¹¿ªÊ¼Ï»¬,ͨ¹ýBµãºó±»Ë®Æ½Å׳ö,¾­¹ýÒ»¶Îʱ¼äºóÇ¡ºÃÒÔƽÐÐÓÚ±¡Ä¾°åµÄ·½Ïò»¬ÉÏľ°å,ÔÚÎï¿é»¬ÉÏľ°åµÄͬʱľ°å½â³ýËø¶¨.ÒÑÖªÎï¿éÓ뱡ľ°å¼äµÄ¶¯Ä¦²ÁÒòÊýΪ.È¡g=10m/s2£¬Çó£º

¢ÅÎï¿éµ½´ïBµãʱ¶ÔÔ²ÐιìµÀµÄѹÁ¦´óС;

¢ÆÎï¿é×öƽÅ×Ô˶¯µÄʱ¼ä;

¢ÇÈôÏ»¬¹ý³ÌÖÐijʱ¿ÌÎï¿éºÍľ°å´ïµ½¹²Í¬ËÙ¶È,ÔòÕâ¸öËÙ¶ÈΪ¶à´ó?

 

£¨1£©3N£¨2£©0.11s£¨3£©

½âÎö:£¨1£©Îï¿éÓÉAµ½B £º   ¡­¡­¡­¡­£¨2·Ö£©

ÔÚBµã£º¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨1·Ö£©

½âµÃ£º¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨1·Ö£©

ÓÉÅ£¶ÙµÚÈý¶¨ÂÉ¿É£ºÎï¿é¶Ô¹ìµÀµÄѹÁ¦Îª3N¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨1·Ö£©

£¨2£©ÉèÎï¿éµ½´ïбÃæµÄÊúÖ±ËÙ¶ÈΪ£¬Ôò¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©

¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£¨1·Ö£©

½âµÃ£º¡­¡­¡­¡­¡­¡­¡­¡­£¨1·Ö£©

£¨3£©Îï¿éÔÚEµãµÄËٶȣº¡­¡­¡­¡­¡­¡­¡­¡­£¨1·Ö£©

¶ÔÎï¿é; ,¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©

¶Ôľ°å£º£¬¡­¡­¡­¡­¡­¡­¡­¡­£¨2·Ö£©

½âµÃ£º ¡­¡­¡­¡­¡­¡­¡­¡­£¨1·Ö£©

 

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2013?µÂÖݶþÄ££©ÈçͼËùʾ£¬AB¶ÎΪһ°ë¾¶R=0.2mµÄ¹â»¬
1
4
Ô²»¡¹ìµÀ£¬EFΪһÇã½ÇÊÇ30¡ãµÄ×ã¹»³¤µÄ¹â»¬¹Ì¶¨Ð±Ã棬б¶øÉÏÓÐÒ»ÖÊÁ¿Îª0.1kgµÄ±¡Ä¾°åCD£¬¿ªÊ¼Ê±±¡Ä¾°å±»Ëø¶¨£®Ò»ÖÊÁ¿Ò²Îª0.1kgµÄÎï¿é´ÓÇÒµãÓɾ²Ö¹¿ªÊ¼Ï»¬£¬Í¨¹ýBµãºóˮƽÅ׳ö£¬¾­¹ýÒ»¶Îʱ¼äºóÇ¡ºÃÒÔƽÐÐÓÚ±¡Ä¾°åµÄ·½Ïò»¬Éϱ¡Ä¾°å£¬ÔÚÎï¿é»¬Éϱ¡Ä¾°åµÄͬʱ±¡Ä¾·¹£¬½â³ýËø¶¨£¬Ï»¬¹ý³ÌÖÐijʱ¿ÌÎï¿éºÍ±¡Ä¾°åÄÜ´ïµ½¹²Í¬Ëٶȣ®ÒÑÖªÎï¿éÓ뱡ľ°å¼äµÄ¶¯Ä¦²ÁÒòÊýΪ¦Ì=
3
6
£®£¨g=10m/s2£¬½á¹û¿É±£Áô¸ùºÅ£©Çó£º
£¨1£©Îï¿éµ½´ïBµãʱ¶ÔÔ²»¡¹ìµÀµÄѹÁ¦£»
£¨2£©Îï¿é»¬Éϱ¡Ä¾°åʱµÄËٶȴóС£»
£¨3£©´ïµ½¹²Í¬ËÙ¶ÈÇ°Îï¿éÏ»¬µÄ¼ÓËٶȴóС¼°´ÓÎï¿é»¬Éϱ¡Ä¾°åÖÁ´ïµ½¹²Í¬ËÙ¶ÈËùÓõÄʱ¼ä£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2012½ìɽ¶«Ê¡À³ÎßÊеÚÒ»ÖÐѧ¸ßÈý4ÔÂ×ÔÖ÷¼ì²âÀí¿Æ×ÛºÏÎïÀíÊÔÌ⣨´ø½âÎö£© ÌâÐÍ£º¼ÆËãÌâ

ÈçͼËùʾ£¬ AB¶ÎΪһ°ë¾¶R=0.2mµÄ¹â»¬Ô²ÐιìµÀ£¬EFΪһÇã½ÇΪ30¡ãµÄ¹â»¬Ð±Ãæ,бÃæÉÏÓÐÒ»ÖÊÁ¿Îª0.1KgµÄ±¡Ä¾°åCD, ľ°åµÄ϶ËDÀëбÃæµ×¶ËµÄ¾àÀëΪ15m,¿ªÊ¼Ê±Ä¾°å±»Ëø¶¨.Ò»ÖÊÁ¿Ò²Îª0.1KgµÄÎï¿é´ÓAµãÓɾ²Ö¹¿ªÊ¼Ï»¬,ͨ¹ýBµãºó±»Ë®Æ½Å׳ö,¾­¹ýÒ»¶Îʱ¼äºóÇ¡ºÃÒÔƽÐÐÓÚ±¡Ä¾°åµÄ·½Ïò»¬ÉÏľ°å,ÔÚÎï¿é»¬ÉÏľ°åµÄͬʱľ°å½â³ýËø¶¨.ÒÑÖªÎï¿éÓ뱡ľ°å¼äµÄ¶¯Ä¦²ÁÒòÊýΪ.È¡g=10m/s2£¬Çó£º
¢ÅÎï¿éµ½´ïBµãʱ¶ÔÔ²ÐιìµÀµÄѹÁ¦´óС;
¢ÆÎï¿é×öƽÅ×Ô˶¯µÄʱ¼ä;
¢ÇÈôÏ»¬¹ý³ÌÖÐijʱ¿ÌÎï¿éºÍľ°å´ïµ½¹²Í¬ËÙ¶È,ÔòÕâ¸öËÙ¶ÈΪ¶à´ó?

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2013-2014ɽ¶«¼ÃÄþÊиßÈýµÚÒ»´ÎÄ£Ä⿼ÊÔÀí¿Æ×ÛºÏÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£º¼ÆËãÌâ

(18·Ö)ÈçͼËùʾ£¬AB¶ÎΪһ°ë¾¶R=0£®2mµÄ¹â»¬Ô²»¡¹ìµÀ£¬EFΪһÇã½ÇÊÇ37¡ãµÄ×ã¹»³¤µÄ¹â»¬¹Ì¶¨Ð±Ã棬бÃæÉÏÓÐÒ»ÖÊÁ¿Îª0£®1kgµÄ±¡Ä¾°åCD£¬¿ªÊ¼Ê±Ä¾°å±»Ëø¶¨£®Ò»ÖÊÁ¿Ò²Îª0£®1kgµÄÎï¿é´ÓAµãÓɾ²Ö¹¿ªÊ¼Ï»¬£¬Í¨¹ýBµãºóˮƽÅ׳ö£¬¾­¹ýÒ»¶Îʱ¼äºóÇ¡ºÃÒÔƽÐÐÓÚľ°åµÄ·½Ïò»¬ÉÏľ°å£¬ÔÚÎï¿é»¬ÉÏľ°åµÄͬʱ£¬Ä¾°å½â³ýËø¶¨£¬Ï»¬¹ý³ÌÖÐijʱ¿ÌÎï¿éºÍľ°åÄÜ´ïµ½¹²Í¬Ëٶȣ®ÒÑÖªÎï¿éÓëľ°å¼äµÄ¶¯Ä¦²ÁÒòÊýΪ£¨gÈ¡£©£¬

Çó£º(1)Îï¿éµ½´ïBµãʱ¶ÔÔ²»¡¹ìµÀѹÁ¦µÄ´óС£»

(2)Îï¿é×öƽÅ×Ô˶¯µÄʱ¼ä£»

(3)ÈôÏ»¬¹ý³ÌÖÐijʱ¿ÌÎï¿éºÍľ°å´ïµ½¹²Í¬Ëٶȣ¬ÔòÕâ¸öËÙ¶ÈΪ¶à´ó?(ľ°å×ã¹»³¤)

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2011-2012ѧÄêɽ¶«Ê¡À³ÎßÊиßÈý4ÔÂ×ÔÖ÷¼ì²âÀí¿Æ×ÛºÏÎïÀíÊÔÌ⣨½âÎö°æ£© ÌâÐÍ£º¼ÆËãÌâ

ÈçͼËùʾ£¬ AB¶ÎΪһ°ë¾¶R=0.2mµÄ¹â»¬Ô²ÐιìµÀ£¬EFΪһÇã½ÇΪ30¡ãµÄ¹â»¬Ð±Ãæ,бÃæÉÏÓÐÒ»ÖÊÁ¿Îª0.1KgµÄ±¡Ä¾°åCD, ľ°åµÄ϶ËDÀëбÃæµ×¶ËµÄ¾àÀëΪ15m,¿ªÊ¼Ê±Ä¾°å±»Ëø¶¨.Ò»ÖÊÁ¿Ò²Îª0.1KgµÄÎï¿é´ÓAµãÓɾ²Ö¹¿ªÊ¼Ï»¬,ͨ¹ýBµãºó±»Ë®Æ½Å׳ö,¾­¹ýÒ»¶Îʱ¼äºóÇ¡ºÃÒÔƽÐÐÓÚ±¡Ä¾°åµÄ·½Ïò»¬ÉÏľ°å,ÔÚÎï¿é»¬ÉÏľ°åµÄͬʱľ°å½â³ýËø¶¨.ÒÑÖªÎï¿éÓ뱡ľ°å¼äµÄ¶¯Ä¦²ÁÒòÊýΪ.È¡g=10m/s2£¬Çó£º

¢ÅÎï¿éµ½´ïBµãʱ¶ÔÔ²ÐιìµÀµÄѹÁ¦´óС;

¢ÆÎï¿é×öƽÅ×Ô˶¯µÄʱ¼ä;

¢ÇÈôÏ»¬¹ý³ÌÖÐijʱ¿ÌÎï¿éºÍľ°å´ïµ½¹²Í¬ËÙ¶È,ÔòÕâ¸öËÙ¶ÈΪ¶à´ó?

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸