ÈçͼËùʾ£¬Ò»´òµã¼ÆʱÆ÷¹Ì¶¨ÔÚбÃæÉ϶ˣ¬Ò»Ð¡³µÍÏ×Å´©¹ý´òµã¼ÆʱÆ÷µÄÖ½´ø´ÓбÃæÉÏÔȼÓËÙÖ±Ïß»¬Ï£®ÓÉÓÚʵÑéÕß´ÖÐÄ£¬²»Ð¡ÐÄ°ÑÖ½´øŪ³ÉÁËÈý¶Î£¬²¢°ÑÖмäÒ»¶Î¶ªÊ§ÁË£¬ÏÂͼÊÇ´ò³öµÄÍêÕûÖ½´øÖÐʣϵÄÁ½¶Î£®ÕâÁ½¶ÎÖ½´øÊÇС³µÔ˶¯µÄ×î³õºÍ×îºóÁ½¶Îʱ¼ä·Ö±ð´ò³öµÄÖ½´ø£¬ÒÑÖª´òµã¼ÆʱÆ÷ʹÓõĽ»Á÷µçƵÂÊΪ50Hz£¬¼´ÏÂͼÿÁ½¸ö¼ÆʱµãµÄʱ¼ä¼ä¸ôΪ0.02Ã룮Çë¸ù¾ÝÏÂͼ¸ø³öµÄÊý¾Ý»Ø´ðÏÂÁÐÎÊÌ⣺
£¨1£©Ö½´øµÄ
 
£¨¿ÕÖÐÑ¡Ìî¡°ÓҶˡ±»ò¡°×ó¶Ë¡±£©ÓëС³µÏàÁ¬£®£¨3·Ö£©
£¨2£©Ð¡³µÍ¨¹ýAµãµÄ˲ʱËٶȦÔA=
 
m/s£®£¨´ð°¸±£ÁôÈýλÓÐЧÊý×Ö£©£¨3·Ö£©
£¨3£©Ö½´øÉÏDEÖ®¼äµÄ¾àÀëxDE=
 
cm£®£¨´ð°¸±£ÁôÈýλÓÐЧÊý×Ö£©£¨3·Ö£©
£¨4£©Ð¡³µµÄ¼ÓËÙ¶Èa=
 
m/s2£®£¨´ð°¸±£ÁôÈýλÓÐЧÊý×Ö£©£¨3·Ö£©
¾«Ó¢¼Ò½ÌÍø
·ÖÎö£º£¨1£©Ð¡³µ×ö¼ÓËÙÔ˶¯£¬Ëù´òµãÖ®¼ä¾àÀëÔ½À´Ô½´ó£¬ÓÉ´Ë¿ÉÅжÏÖ½´øµÄÄǶËÓëС³µÏàÁ¬£»
£¨2£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯ÖÐʱ¼äÖеãµÄËٶȵÈÓڸùý³ÌÖеÄƽ¾ùËٶȣ¬¿ÉÒÔÇó³ö´òÖ½´øÉÏAµãʱС³µµÄ˲ʱËٶȴóС£»
£¨3£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯ÖÐÁ¬ÐøÏàµÈʱ¼äÄÚµÄλÒƲîΪ³£Êý£¬¼´¡÷x=aT2=³£Êý£¬¿ÉÒÔÇó³öxDEµÄ´óС£»
£¨4£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯µÄÍÆÂÛ¹«Ê½¡÷x=aT2¿ÉÒÔÇó³ö¼ÓËٶȵĴóС£®
½â´ð£º½â£º£¨1£©ÓÉÌâÒâ¿ÉÖª£¬Ð¡³µ×ö¼ÓËÙÔ˶¯£¬¼ÆÊýµãÖ®¼äµÄ¾àÀëÔ½À´Ô½´ó£¬¹ÊС³µÓëÖ½´øµÄ×ó²àÏàÁ¬£®
£¨2£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯ÖÐʱ¼äÖеãµÄËٶȵÈÓڸùý³ÌÖеÄƽ¾ùËٶȣ¬¿ÉÒÔÇó³ö´òÖ½´øÉÏAµãʱС³µµÄ˲ʱËٶȴóСΪ£º
vA=
x
t
=
(5.12+5.74)¡Á10-2m
4¡Á0.02s
¡Ö1.36m/s

£¨3£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯ÖÐÁ¬ÐøÏàµÈʱ¼äÄÚµÄλÒƲîΪ³£Êý£¬¼´¡÷x=aT2=³£Êý£¬ÓУº
xEF-xDE=xFG-xEF
¼´8.85cm-xDE=9.47cm-8.85cm
xDE=8.23cm
£¨4£©ÓÉÌâÒâ¿ÉÖª£º¡÷x=0.62cmΪ³£Êý£¬¸ù¾Ý¡÷x=aT2¿ÉµÃ£º
a=
¡÷x
T2
=
0.62¡Á10-2m
(2¡Á0.02s)2
¡Ö3.88m/s2

¹Ê´ð°¸Îª£º£¨1£©×ó¶Ë£»£¨2£©1.36£»£¨3£©8.23£»£¨4£©3.88£®
µãÆÀ£º±¾Ì⿼²éÁË¡°Ì½¾¿ÔȱäËÙÖ±ÏßÔ˶¯¡±µÄʵÑéÖÐËùÐèʵÑéÆ÷²Ä£¬ÒÔ¼°ÀûÓÃÔȱäËÙÖ±ÏߵĹæÂÉÒÔ¼°ÍÆÂÛ½â´ðʵÑéÎÊÌâµÄÄÜÁ¦£¬ÔÚƽʱÁ·Ï°ÖÐÒª¼ÓÇ¿»ù´¡ÖªÊ¶µÄÀí½âÓëÓ¦Óã¬Ìá¸ß½â¾öÎÊÌâÄÜÁ¦£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÈçͼËùʾ£¬Ò»´òµã¼ÆʱÆ÷¹Ì¶¨ÔÚбÃæÉ϶ˣ¬Ò»Ð¡³µÍÏ×Å´©¹ý´òµã¼ÆʱÆ÷µÄÖ½´ø´ÓбÃæÉÏ»¬Ï£®ÏÂͼÊÇ´ò³öµÄÖ½´øµÄÒ»¶Î£®£¨1£©ÒÑÖª´òµã¼ÆʱÆ÷ʹÓõĽ»Á÷µçƵÂÊΪ50Hz£¬ÀûÓÃÏÂͼ¸ø³öµÄÊý¾Ý¿ÉÇó³öС³µÏ»¬µÄ¼ÓËÙ¶Èa=
 
£®£¨2£©ÎªÁËÇó³öС³µÔÚÏ»¬¹ý³ÌÖÐËùÊܵÄ×èÁ¦£¬»¹ÐèÒª²âÁ¿µÄÎïÀíÁ¿ÓÐ
 
£®ÓòâµÃµÄÁ¿¼°¼ÓËÙ¶Èa±íʾ×èÁ¦´óСµÄ¼ÆËãʽΪf=
 
£®£¨Í¼Öе¥Î»£ºcm£©
¾«Ó¢¼Ò½ÌÍø

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2011-2012ѧÄêɽ¶«Ê¡Ý·ÏØʵÑé¸ßÖи߶þÏÂѧÆÚÆÚÄ©¿¼ÊÔÎïÀíÊÔ¾í£¨´ø½âÎö£© ÌâÐÍ£ºÊµÑéÌâ

ÈçͼËùʾ£¬Ò»´òµã¼ÆʱÆ÷¹Ì¶¨ÔÚбÃæÉ϶ˣ¬Ò»Ð¡³µÍÏ×Å´©¹ý´òµã¼ÆʱÆ÷µÄÖ½´ø´ÓбÃæÉÏ»¬Ï¡£ÏÂͼÊÇ´ò³öµÄÖ½´øµÄÒ»¶Î¡£¢ÅÒÑÖª´òµã¼ÆʱÆ÷ʹÓõĽ»Á÷µçƵÂÊΪ50Hz£¬ÀûÓÃÏÂͼ¸ø³öµÄÊý¾Ý¿ÉÇó³öС³µÏ»¬µÄ¼ÓËÙ¶Èa=_____¡£¢ÆΪÁËÇó³öС³µÔÚÏ»¬¹ý³ÌÖÐËùÊܵÄ×èÁ¦£¬»¹ÐèÒª²âÁ¿µÄÎïÀíÁ¿ÓÐ_______¡£ÓòâµÃµÄÁ¿¼°¼ÓËÙ¶Èa±íʾ×èÁ¦´óСµÄ¼ÆËãʽΪf=_________¡££¨Í¼Öе¥Î»£ºcm£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2013½ìɽ¶«Ê¡¸ß¶þÏÂѧÆÚÆÚÄ©¿¼ÊÔÎïÀíÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£ºÊµÑéÌâ

ÈçͼËùʾ£¬Ò»´òµã¼ÆʱÆ÷¹Ì¶¨ÔÚбÃæÉ϶ˣ¬Ò»Ð¡³µÍÏ×Å´©¹ý´òµã¼ÆʱÆ÷µÄÖ½´ø´ÓбÃæÉÏ»¬Ï¡£ÏÂͼÊÇ´ò³öµÄÖ½´øµÄÒ»¶Î¡£¢ÅÒÑÖª´òµã¼ÆʱÆ÷ʹÓõĽ»Á÷µçƵÂÊΪ50Hz£¬ÀûÓÃÏÂͼ¸ø³öµÄÊý¾Ý¿ÉÇó³öС³µÏ»¬µÄ¼ÓËÙ¶Èa=_____¡£¢ÆΪÁËÇó³öС³µÔÚÏ»¬¹ý³ÌÖÐËùÊܵÄ×èÁ¦£¬»¹ÐèÒª²âÁ¿µÄÎïÀíÁ¿ÓÐ_______¡£ÓòâµÃµÄÁ¿¼°¼ÓËÙ¶Èa±íʾ×èÁ¦´óСµÄ¼ÆËãʽΪf=_________¡££¨Í¼Öе¥Î»£ºcm£©

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨6·Ö£©ÈçͼËùʾ£¬Ò»´òµã¼ÆʱÆ÷¹Ì¶¨ÔÚбÃæÉ϶ˣ¬Ò»Ð¡³µÍÏ×Å´©¹ý´òµã¼ÆʱÆ÷µÄÖ½´ø´ÓбÃæÉÏ»¬Ï¡£ÏÂͼÊÇ´ò³öµÄÖ½´øµÄÒ»¶Î¡£¢ÅÒÑÖª´òµã¼ÆʱÆ÷ʹÓõĽ»Á÷µçƵÂÊΪ50Hz£¬ÀûÓÃÏÂͼ¸ø³öµÄÊý¾Ý¿ÉÇó³öС³µÏ»¬µÄ¼ÓËÙ¶Èa=_____¡£¢ÆΪÁËÇó³öС³µÔÚÏ»¬¹ý³ÌÖÐËùÊܵÄ×èÁ¦£¬»¹ÐèÒª²âÁ¿µÄÎïÀíÁ¿ÓÐ_______¡£ÓòâµÃµÄÁ¿¼°¼ÓËÙ¶Èa±íʾ×èÁ¦´óСµÄ¼ÆËãʽΪf=_________¡££¨Í¼Öе¥Î»£ºcm£©

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸