°à¼¶ÐËȤС×é¼Æ»®Ì½¾¿µ¥°ÚÖÜÆÚÓë°Ú³¤µÄ¹Øϵ£º
£¨1£©ÒÑÖª°ÚÇòµÄÖ±¾¶Îª2cm£¬²âµÃij´Îµ¥°ÚÊúÖ±Ðü¹Òʱ£¬Ðüµã¶ÔÆë¡°0¡±¿Ì¶È£¬Ï¶˿̶ȳ߶ÁÊýÈçͼ1£¬Ôò¸Ãµ¥°Ú°Ú³¤Îª
874.0
874.0
mm£®
£¨2£©ÔÚij´Î²âÁ¿ÖÜÆÚʱ£¬ÔÚÍ£±íÉϼǼÁË°Ú¶¯50´ÎµÄʱ¼äÈçͼ2£¬Ôò°Ú¶¯ÖÜÆÚÊÇ
1.94
1.94
s£¨±£ÁôÈýλÓÐЧÊý×Ö£©
£¨3£©½«¼Ç¼Êý¾ÝÃè»æµ½T2-LͼÏó3ÉÏ£¬¸ÃͼÏóбÂʵÄÒâÒåÊÇ
k=
4¦Ð2
g
k=
4¦Ð2
g
£¬µ±µØµÄÖØÁ¦¼ÓËÙ¶Èg=
9.86
9.86
m/s2
·ÖÎö£º£¨1£©°ÚÏß³¤¶ÈÓë°ÚÇò°ë¾¶Ö®ºÍÊǵ¥°ÚµÄ°Ú³¤£¬ÓÉͼ1Ëùʾ¿Ì¶È³ß¶Á³öµ¥°ÚµÄ°Ú³¤£»
£¨2£©Ãë±í·ÖÕëÓëÃëÕëʾÊýÖ®ºÍÊÇÃë±íʾÊý£¬¶Á³öÃë±íʾÊý£¬È»ºóÇó³öµ¥°ÚÖÜÆÚ£»
£¨3£©¸ù¾Ýµ¥°ÚÖÜÆÚ¹«Ê½Çó³öͼÏóµÄº¯Êý±í´ïʽ£¬È»ºó´ðÌ⣮
½â´ð£º½â£º£¨1£©°ÚÇòϱßÔµÓëÐü¹ÒµãµÄ¾àÀëΪ88.40cm£¬°ë¾¶1cm£¬¹Ê°Ú³¤Îª87.40cm=874.0mm£»
£¨2£©ÓÉͼʾÃë±í¿ÉÖª£¬ÆäËùʾΪ£º90+6.8s=96.8s£¬
µ¥°ÚµÄÖÜÆÚΪ£ºT=
t
n
=
96.8s
50
=1.936s¡Ö1.94s£»
£¨3£©ÓÉT=2¦Ð
L
g
µÃ£ºT2=
4¦Ð2
g
L£¬ÔòT2-LͼÏóµÄбÂÊk=
4¦Ð2
g
£¬
ÓÉͼÏó¿ÉÖªk=
4¦Ð2
g
=4£¬½âµÃ£ºg¡Ö9.86m/s2£»
¹Ê´ð°¸Îª£º£¨1£©874.0£»£¨2£©1.94£»£¨3£©k=
4¦Ð2
g
£»9.86£®
µãÆÀ£ºÓ¦Óõ¥°ÚÇó³ö¹«Ê½Çó³öͼÏóµÄº¯Êý±í´ïʽÊÇÕýÈ·½âÌâµÄ¹Ø¼ü£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2012-2013ѧÄê½­Î÷Ê¡¾°µÂÕòÊи߶þÏÂѧÆÚÆÚÖÐÖÊÁ¿¼ì²âÎïÀíÊÔ¾í£¨´ø½âÎö£© ÌâÐÍ£ºÌî¿ÕÌâ

°à¼¶ÐËȤС×é¼Æ»®Ì½¾¿µ¥°ÚÖÜÆÚÓë°Ú³¤µÄ¹Øϵ£º
£¨1£©ÒÑÖª°ÚÇòµÄÖ±¾¶Îª2cm£¬²âµÃij´Îµ¥°ÚÊúÖ±Ðü¹Òʱ£¬Ðüµã¶ÔÆë¡°0¡±¿Ì¶È£¬Ï¶˿̶ȳ߶ÁÊýÈçͼ£¬Ôò¸Ãµ¥°Ú°Ú³¤Îª             mm ¡£

£¨2£©ÔÚij´Î²âÁ¿ÖÜÆÚʱ£¬ÔÚÍ£±íÉϼǼÁË°Ú¶¯50´ÎµÄʱ¼äÈçͼ£¬Ôò°Ú¶¯ÖÜÆÚÊÇ        s£¨±£ÁôÈýλÓÐЧÊý×Ö£©
£¨3£©½«¼Ç¼Êý¾ÝÃè»æµ½T2¡ªLͼÏñÉÏ£¬¸ÃͼÏñбÂʵÄÒâÒåÊÇ              £¬µ±µØµÄÖØÁ¦¼ÓËÙ¶Èg =                m/s2

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2014½ì½­Î÷Ê¡¾°µÂÕòÊи߶þÏÂѧÆÚÆÚÖÐÖÊÁ¿¼ì²âÎïÀíÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£ºÌî¿ÕÌâ

°à¼¶ÐËȤС×é¼Æ»®Ì½¾¿µ¥°ÚÖÜÆÚÓë°Ú³¤µÄ¹Øϵ£º

£¨1£©ÒÑÖª°ÚÇòµÄÖ±¾¶Îª2cm£¬²âµÃij´Îµ¥°ÚÊúÖ±Ðü¹Òʱ£¬Ðüµã¶ÔÆë¡°0¡±¿Ì¶È£¬Ï¶˿̶ȳ߶ÁÊýÈçͼ£¬Ôò¸Ãµ¥°Ú°Ú³¤Îª             mm ¡£

£¨2£©ÔÚij´Î²âÁ¿ÖÜÆÚʱ£¬ÔÚÍ£±íÉϼǼÁË°Ú¶¯50´ÎµÄʱ¼äÈçͼ£¬Ôò°Ú¶¯ÖÜÆÚÊÇ        s£¨±£ÁôÈýλÓÐЧÊý×Ö£©

£¨3£©½«¼Ç¼Êý¾ÝÃè»æµ½T2¡ªLͼÏñÉÏ£¬¸ÃͼÏñбÂʵÄÒâÒåÊÇ              £¬µ±µØµÄÖØÁ¦¼ÓËÙ¶Èg =                m/s2

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸