ÌâÄ¿ÄÚÈÝ

£¨1£©ÈçͼËùʾΪÓôòµã¼ÆʱÆ÷ÑéÖ¤»úеÄÜÊغ㶨ÂɵÄʵÑé×°Ö㮹ØÓÚÕâһʵÑ飬ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ______
A£®´òµã¼ÆʱÆ÷Ó¦½ÓÖ±Á÷µçÔ´
B£®Ó¦ÏÈÊÍ·ÅÖ½´ø£¬ºó½ÓͨµçÔ´´òµã
C£®ÐèʹÓÃÃë±í²â³öÖØÎïÏÂÂäµÄʱ¼ä
D£®²â³öÖ½´øÉÏÁ½µã¼£¼äµÄ¾àÀ룬¿ÉÖªÖØÎïÏàÓ¦µÄÏÂÂä¸ß¶È
£¨2£©ÔÚÓõç»ð»¨¼ÆʱÆ÷£¨»òµç´Å´òµã¼ÆʱÆ÷£©Ñо¿ÔȱäËÙÖ±¡¡¡¡ÏßÔ˶¯µÄʵÑéÖУ¬Ä³Í¬Ñ§´ò³öÁËÒ»ÌõÖ½´ø£®ÒÑÖª¼ÆʱÆ÷´òµãµÄʱ¼ä¼ä¸ôΪ0.02s£¬Ëû°´´òµãÏȺó˳Ðòÿ5¸öµãÈ¡1¸ö¼ÆÊýµã£¬µÃµ½ÁËO¡¢A¡¢B¡¢C¡¢DµÈ¼¸¸ö¼ÆÊýµã£¬ÈçͼËùʾ£¬ÔòÏàÁÚÁ½¸ö¼ÆÊýµãÖ®¼äµÄʱ¼ä¼ä¸ôΪ______s£®Óÿ̶ȳßÁ¿µÃOA=1.50cm¡¢AB=1.90cm¡¢BC=2.30cm¡¢CD=2.70cm£®ÓÉ´Ë¿ÉÖª£¬Ö½´ø×ö______Ô˶¯£¨Ñ¡Ìî¡°ÔȼÓËÙ¡±»ò¡°ÔȼõËÙ¡±£©£¬´òCµãʱֽ´øµÄËٶȴóСΪ______m/s£®

¾«Ó¢¼Ò½ÌÍø
¾«Ó¢¼Ò½ÌÍø
£¨1£©A¡¢´òµã¼ÆʱÆ÷Ó¦½Ó½»Á÷µçÔ´£¬¹ÊA´íÎó£®
B¡¢¿ªÊ¼¼Ç¼ʱ£¬Ó¦Ïȸø´òµã¼ÆʱÆ÷ͨµç´òµã£¬È»ºóÔÙÊÍ·ÅÖØ´¸£¬ÈÃËü´ø×ÅÖ½´øһͬÂäÏ£¬Èç¹ûÏÈ·Å¿ªÖ½´øÈÃÖØÎïÏÂÂ䣬ÔÙ½Óͨ´òµã¼ÆʱʱÆ÷µÄµçÔ´£¬ÓÉÓÚÖØÎïÔ˶¯½Ï¿ì£¬²»ÀûÓÚÊý¾ÝµÄ²É¼¯ºÍ´¦Àí£¬»á¶ÔʵÑé²úÉú½Ï´óµÄÎó²î£®¹ÊB´íÎó£®
C¡¢ÎÒÃÇ¿ÉÒÔͨ¹ý´òµã¼ÆʱÆ÷¼ÆËãʱ¼ä£¬²»ÐèÒªÃë±í£®¹ÊC´íÎó£®
D¡¢²â³öÖ½´øÉÏÁ½µã¼£¼äµÄ¾àÀ룬¿ÉÖªÖØÎïÏàÓ¦µÄÏÂÂä¸ß¶È£¬¹ÊDÕýÈ·£®
¹ÊÑ¡D£®
£¨2£©°´´òµãÏȺó˳Ðòÿ5¸öµãÈ¡1¸ö¼ÆÊýµã£¬ÔòÏàÁÚÁ½¸ö¼ÆÊýµãÖ®¼äµÄʱ¼ä¼ä¸ôΪ0.1s£®
ÓÉÓÚÏàÁڵļÆÊýµãµÄλÒÆÖ®²îÏàµÈ£¬ËùÒÔÖ½´ø×öÔȼÓËÙÖ±ÏßÔ˶¯£®
ÀûÓÃÔȱäËÙÖ±ÏßÔ˶¯µÄÍÆÂÛ
vc=
xBD
tBD
=
(2.30+2.70)cm
2¡Á0.1s
=0.25m/s£®
¹Ê´ð°¸Îª£º£¨1£©D
£¨2£©0.1¡¢ÔȼÓËÙ¡¢0.25£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø