ÔÚ¡¶Ñо¿ÔȱäËÙÖ±ÏßÔ˶¯¡·µÄʵÑéÖУ¬
£¨1£©ËùÓÃʵÑéÆ÷²ÄÓУºµç»ð»¨´òµã¼ÆʱÆ÷¡¢Ö½´ø¡¢Ð¡³µ¡¢´ø»¬Âֵij¤Ä¾°å£®íÀÂ룮¿Ì¶È³ß¡¢µ¼Ïß¡¢µçÔ´µÈ£¬ÆäÖеçÔ´±ØÐëÊÇ
D
D

A£®4¡«6VµÄÐîµç³Ø           B£®4¡«6VµÄµÍѹ½»Á÷µç
C£®4¡«6VµÄ¸Éµç³Ø           D£®220V½»Á÷µç
£¨2£©ÈçͼËùʾΪij´Î¼Ç¼С³µÔ˶¯Çé¿öµÄÖ½´ø£¬µã»ð»¨´òµã¼ÆʱÆ÷ÒÀ´ÎÔÚÖ½´øÉÏ´ò³öͼÖÐA¡¢B¡¢C¡¢D¡¢EÏàÁڵļÆÊýµã£¬ÒÑÖªÏàÁڵļÆÊýµãµÄʱ¼ä¼ä¸ôΪ0.1s£®¸ù¾ÝÖ½´øÉÏËù¸ø³öµÄÊý¾Ý£¬¿ÉÒÔÅжϸÃС³µ×ö
ÔȼÓËÙ
ÔȼÓËÙ
Ô˶¯£»ÔÚ´òCµãʱС³µµÄËٶȴóСvC=
1.0
1.0
m/s£¬Ð¡³µµÄÔ˶¯¼ÓËٶȴóСa=
2.0
2.0
m/s2£¬·½ÏòÊÇ
´ÓEÖ¸ÏòA
´ÓEÖ¸ÏòA
£¨Ì¡°´ÓAÖ¸ÏòE¡±»ò¡°´ÓEÖ¸ÏòA¡±£©
·ÖÎö£º£¨1£©µç»ð»¨´òµã¼ÆʱÆ÷ʹÓõÄÊÇ220V½»Á÷µçÔ´£¬¶øµç´Å´òµã¼ÆʱÆ÷ʹÓõÄÊǵÍѹ½»Á÷µçÔ´£®
£¨2£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯ÖÐʱ¼äÖеãµÄËٶȵÈÓڸùý³ÌÖеÄƽ¾ùËٶȣ¬¿ÉÒÔÇó³ö´òÖ½´øÉÏDµãʱС³µµÄ˲ʱËٶȴóС£®¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯µÄÍÆÂÛ¹«Ê½¡÷x=aT2¿ÉÒÔÇó³ö¼ÓËٶȵĴóС£®
½â´ð£º½â£º£¨1£©µç»ð»¨´òµã¼ÆʱÆ÷ʹÓõÄÊÇ220V½»Á÷µçÔ´£¬²»ÄÜʹÓÃÖ±Á÷µçÔ´£¬¹ÊABC´íÎó£¬DÕýÈ·£®
¹Ê´ð°¸Îª£ºD£®
£¨2£©¸ù¾ÝͼÖÐÊý¾Ý¿ÉÖªÁ¬ÐøÏàµÈʱ¼äÄÚµÄλÒƲîΪ¡÷x=2cm£¬Òò´ËС³µ×öÔȼÓËÙÖ±ÏßÔ˶¯£»
¸ù¾Ý¡÷x=aT2µÃ£º
a=
¡÷x
T2
=
2.0cm
(0.1s)2
=2.0m/s
£¬Ð¡³µ×÷¼ÓËÙÔ˶¯£¬Òò´Ë¼ÓËٶȵķ½ÏòÓëËٶȷ½ÏòÏàͬ¼´´ÓEÖ¸ÏòA£®
¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯ÖÐʱ¼äÖеãµÄËٶȵÈÓڸùý³ÌÖеÄƽ¾ùËٶȣ¬ÓУº
vc=
xBD
2T
=
(27.00-7.00)cm
2¡Á0.1s
=1.0m/s

¹Ê´ð°¸Îª£ºÔȼÓËÙÖ±Ïߣ¬1.0£¬2.0£¬´ÓEÖ¸ÏòA£®
µãÆÀ£ºÒªÌá¸ßÓ¦ÓÃÔȱäËÙÖ±ÏߵĹæÂÉÒÔ¼°ÍÆÂÛ½â´ðʵÑéÎÊÌâµÄÄÜÁ¦£¬ÔÚƽʱÁ·Ï°ÖÐÒª¼ÓÇ¿»ù´¡ÖªÊ¶µÄÀí½âÓëÓ¦Óã®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

Èçͼ7Ëùʾ£¬Ä³Í¬Ñ§ÔÚ×ö¡°Ñо¿ÔȱäËÙÖ±ÏßÔ˶¯¡±ÊµÑéÖУ¬ÓÉ´òµã¼ÆʱÆ÷µÃµ½±íʾС³µÔË

¶¯¹ý³ÌµÄÒ»ÌõÇåÎúÖ½´ø£¬Ö½´øÉÏÁ½ÏàÁÚ¼ÆÊýµãµÄʱ¼ä¼ä¸ôΪT=0.10s£¬ÆäÖÐS1=7.05cm¡¢

S2=7.68cm¡¢S3=8.33cm¡¢S4=8.95cm¡¢S5=9.61cm¡¢S6=10.26cm£¬ÔòAµã´¦Ë²Ê±ËٶȵĴóСÊÇ

_______m/s£¬Ð¡³µÔ˶¯µÄ¼ÓËٶȼÆËã±í´ïʽΪ________________£¬¼ÓËٶȵĴóСÊÇ

_______m/s2£¨¼ÆËã½á¹û±£ÁôÁ½Î»ÓÐЧÊý×Ö£©¡£

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸