ÌâÄ¿ÄÚÈÝ
£¨1£©ÔÚÑо¿Æ½Å×Ô˶¯µÄʵÑéÖУ¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ______
A£®±ØÐë³Æ³öСÇòµÄÖÊÁ¿
B£®Ð±²Û¹ìµÀ±ØÐëÊǹ⻬µÄ
C£®Ð±²Û¹ìµÀÄ©¶Ë±ØÐëÊÇˮƽµÄ
D£®Ó¦¸ÃʹСÇòÿ´Î´Óб²ÛÉϲ»Í¬Î»ÖôӾ²Ö¹¿ªÊ¼»¬ÏÂ
£¨2£©Í¼aΪ¼×ͬѧÃè»æµÄƽÅ×Ô˶¯¹ì¼££¬OΪÅ׳öµã£¬°´Í¼ÉϵÄÊý¾Ý£¬ÇóµÃСÇòµÄ³õËÙ¶Èv0=______m/s£®
£¨3£©ÒÒͬѧÔÚÑо¿Æ½Å×Ô˶¯Ê±Ö»ÔÚÊúÖ±°åÃæÉϼÇÏÂÁËÖØ´¸ÏßyµÄ·½Ïò£¬µ«ÍüÁ˼ÇÏÂƽÅ׵ijõλÖã¬ÔÚ×ø±êÖ½ÉÏÃè³öÁËÒ»¶ÎÇúÏߵĹ켣£¬ÈçͼËùʾ£¬ÔÚÇúÏßÉÏÈ¡A¡¢BÁ½µãÁ¿³öËüÃǵ½yÖáµÄ¾àÀ룬AAµÄ¾àÀëx1=10cm£¬BB¾àÀëx2=20cm£¬ÒÔ¼°ABµÄÊúÖ±¾àÀëh=15cm£¬ÓÃÕâЩ¿ÉÒÔÇóµÃСÇòƽÅ×ʱ³õËÙ¶ÈΪ______m/s£®
A£®±ØÐë³Æ³öСÇòµÄÖÊÁ¿
B£®Ð±²Û¹ìµÀ±ØÐëÊǹ⻬µÄ
C£®Ð±²Û¹ìµÀÄ©¶Ë±ØÐëÊÇˮƽµÄ
D£®Ó¦¸ÃʹСÇòÿ´Î´Óб²ÛÉϲ»Í¬Î»ÖôӾ²Ö¹¿ªÊ¼»¬ÏÂ
£¨2£©Í¼aΪ¼×ͬѧÃè»æµÄƽÅ×Ô˶¯¹ì¼££¬OΪÅ׳öµã£¬°´Í¼ÉϵÄÊý¾Ý£¬ÇóµÃСÇòµÄ³õËÙ¶Èv0=______m/s£®
£¨3£©ÒÒͬѧÔÚÑо¿Æ½Å×Ô˶¯Ê±Ö»ÔÚÊúÖ±°åÃæÉϼÇÏÂÁËÖØ´¸ÏßyµÄ·½Ïò£¬µ«ÍüÁ˼ÇÏÂƽÅ׵ijõλÖã¬ÔÚ×ø±êÖ½ÉÏÃè³öÁËÒ»¶ÎÇúÏߵĹ켣£¬ÈçͼËùʾ£¬ÔÚÇúÏßÉÏÈ¡A¡¢BÁ½µãÁ¿³öËüÃǵ½yÖáµÄ¾àÀ룬AAµÄ¾àÀëx1=10cm£¬BB¾àÀëx2=20cm£¬ÒÔ¼°ABµÄÊúÖ±¾àÀëh=15cm£¬ÓÃÕâЩ¿ÉÒÔÇóµÃСÇòƽÅ×ʱ³õËÙ¶ÈΪ______m/s£®
£¨1£©A¡¢Ì½¾¿Æ½Å×Ô˶¯µÄ¹ì¼££¬ÎÞÐè²âÁ¿Ð¡ÇòµÄÖÊÁ¿£¬¹ÊA´íÎó£»
B¡¢Ð¡ÇòÓëб²ÛÖ®¼äµÄĦ²ÁÁ¦Ò»¶¨¶ÔʵÑé½á¹ûûÓÐÓ°Ï죬ֻҪ±£Ö¤µ½´ïб²Ûµ×¶ËµÄËÙ¶ÈÏàͬ¼´ÐУ¬¹ÊB´íÎó£»
C¡¢Ð±²Ûƽֱ²¿·ÖÄ©¶ËµÄÇÐÏßµ÷³Éˮƽ£¬Ê¹µÃСÇòµÄ³õËÙ¶Èˮƽ£¬ÕâÑùСÇò²ÅÄÜ×öƽÅ×Ô˶¯£¬¹ÊCÕýÈ·£»
D¡¢ÎªÊ¹Ð¡Çòÿ´ÎƽÅ×µÄÔ˶¯¹ì¼£Ïàͬ£¬Ð¡ÇòƽÅ׵ijõËÙ¶ÈÓ¦¸ÃÏàͬ£¬¹ÊÒªÇóСÇò×ÜÊÇ´ÓͬһλÖÃÊÍ·Å£¬ÕâÑù²ÅÄÜÕÒµ½Í¬Ò»Ô˶¯¹ì¼£Éϵļ¸¸öµã£¬È»ºó½«Õ⼸¸öµãƽ»¬Á¬½ÓÆðÀ´£¬¹ÊD´íÎó£®
¹ÊÑ¡£ºC£®
£¨2£©OΪÅ׳öµã£¬¸ù¾ÝƽÅ×Ô˶¯¹æÂɵãº
h=
gt2
t=
=
=0.2s
x=v0t
v0=
=
=0.6m/s
£¨3£©Ë®Æ½·½ÏòСÇò×öÔÈËÙÖ±ÏßÔ˶¯£¬ÔòÓɳõʼµãOµ½A¹ý³ÌÓУºx1=v0t0¡¢Ù
ÓɳõʼµãOµ½B¹ý³Ì£ºx2=v0t¡¢Ú
ÊúÖ±·½Ïò×ö×ÔÓÉÂäÌåÔ˶¯£¬ÔòÓУº
h=
gt2-
g
¢Û
ÁªÁ¢¢Ù¢Ú¢ÛµÃ£ºv0=
=
m/s=1.0m/s
¹Ê´ð°¸Îª£º£¨1£©C£»£¨2£©0.6£»£¨3£©1.0£®
B¡¢Ð¡ÇòÓëб²ÛÖ®¼äµÄĦ²ÁÁ¦Ò»¶¨¶ÔʵÑé½á¹ûûÓÐÓ°Ï죬ֻҪ±£Ö¤µ½´ïб²Ûµ×¶ËµÄËÙ¶ÈÏàͬ¼´ÐУ¬¹ÊB´íÎó£»
C¡¢Ð±²Ûƽֱ²¿·ÖÄ©¶ËµÄÇÐÏßµ÷³Éˮƽ£¬Ê¹µÃСÇòµÄ³õËÙ¶Èˮƽ£¬ÕâÑùСÇò²ÅÄÜ×öƽÅ×Ô˶¯£¬¹ÊCÕýÈ·£»
D¡¢ÎªÊ¹Ð¡Çòÿ´ÎƽÅ×µÄÔ˶¯¹ì¼£Ïàͬ£¬Ð¡ÇòƽÅ׵ijõËÙ¶ÈÓ¦¸ÃÏàͬ£¬¹ÊÒªÇóСÇò×ÜÊÇ´ÓͬһλÖÃÊÍ·Å£¬ÕâÑù²ÅÄÜÕÒµ½Í¬Ò»Ô˶¯¹ì¼£Éϵļ¸¸öµã£¬È»ºó½«Õ⼸¸öµãƽ»¬Á¬½ÓÆðÀ´£¬¹ÊD´íÎó£®
¹ÊÑ¡£ºC£®
£¨2£©OΪÅ׳öµã£¬¸ù¾ÝƽÅ×Ô˶¯¹æÂɵãº
h=
1 |
2 |
t=
|
|
x=v0t
v0=
x |
t |
12¡Á10-2m |
0.2s |
£¨3£©Ë®Æ½·½ÏòСÇò×öÔÈËÙÖ±ÏßÔ˶¯£¬ÔòÓɳõʼµãOµ½A¹ý³ÌÓУºx1=v0t0¡¢Ù
ÓɳõʼµãOµ½B¹ý³Ì£ºx2=v0t¡¢Ú
ÊúÖ±·½Ïò×ö×ÔÓÉÂäÌåÔ˶¯£¬ÔòÓУº
h=
1 |
2 |
1 |
2 |
t | 20 |
ÁªÁ¢¢Ù¢Ú¢ÛµÃ£ºv0=
|
|
¹Ê´ð°¸Îª£º£¨1£©C£»£¨2£©0.6£»£¨3£©1.0£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿