ÌâÄ¿ÄÚÈÝ
£¨1£©ÓÐÒ»Óα꿨³ß£¬Ö÷³ßµÄ×îС·Ö¶ÈÊÇ1mm£¬ÓαêÉÏÓÐ20¸öСµÄµÈ·Ö¿Ì¶È£®ÓÃËü²âÁ¿Ò»Ð¡ÇòµÄÖ±¾¶£¬Èçͼ¼×ËùʾµÄ¶ÁÊýÊÇ______mm£®ÓÃÂÝÐý²â΢Æ÷²âÁ¿Ò»¸ù½ðÊôË¿µÄÖ±¾¶£¬ÈçͼÒÒËùʾµÄ¶ÁÊýÊÇ______mm£®
£¨2£©Ä³ÊµÑéС×éÀûÓÃÈçͼ1ËùʾµÄʵÑé×°ÖÃÀ´ÑéÖ¤¹³ÂëºÍ»¬¿éËù×é³ÉµÄϵͳ»úеÄÜÊغ㣮
¢ÙʵÑéÇ°ÐèÒªµ÷ÕûÆøµæµ¼¹ìµ××ùʹ֮ˮƽ£¬ÀûÓÃÏÖÓÐÆ÷²ÄÈçºÎÅжϵ¼¹ìÊÇ·ñˮƽ£¿______£®
¢Ú²âµÃÕÚ¹âÌõµÄ¿í¶Èd=0.50cm£»ÊµÑéʱ½«»¬¿é´ÓͼʾλÖÃÓɾ²Ö¹ÊÍ·Å£¬ÓÉÊý×Ö¼ÆʱÆ÷¶Á³öÕÚ¹âÌõͨ¹ý¹âµçÃŵÄʱ¼ä¡÷t=2.0¡Á10-2s£¬Ôò»¬¿é¾¹ý¹âµçÃÅʱµÄ˲ʱËÙ¶ÈΪ______m/s£®ÔÚ±¾´ÎʵÑéÖл¹ÐèÒª²âÁ¿µÄÎïÀíÁ¿ÓУº¹³ÂëµÄÖÊÁ¿m¡¢______ºÍ______£¨ÎÄ×Ö˵Ã÷²¢ÓÃÏàÓ¦µÄ×Öĸ±íʾ£©£®
¢Û±¾ÊµÑéͨ¹ý±È½Ï______ºÍ______ÔÚʵÑéÎó²îÔÊÐíµÄ·¶Î§ÄÚÏàµÈ£¨ÓòâÁ¿µÄÎïÀíÁ¿·ûºÅ±íʾ£©£¬´Ó¶øÑéÖ¤ÁËϵͳµÄ»úеÄÜÊغ㣮
£¨2£©Ä³ÊµÑéС×éÀûÓÃÈçͼ1ËùʾµÄʵÑé×°ÖÃÀ´ÑéÖ¤¹³ÂëºÍ»¬¿éËù×é³ÉµÄϵͳ»úеÄÜÊغ㣮
¢ÙʵÑéÇ°ÐèÒªµ÷ÕûÆøµæµ¼¹ìµ××ùʹ֮ˮƽ£¬ÀûÓÃÏÖÓÐÆ÷²ÄÈçºÎÅжϵ¼¹ìÊÇ·ñˮƽ£¿______£®
¢Ú²âµÃÕÚ¹âÌõµÄ¿í¶Èd=0.50cm£»ÊµÑéʱ½«»¬¿é´ÓͼʾλÖÃÓɾ²Ö¹ÊÍ·Å£¬ÓÉÊý×Ö¼ÆʱÆ÷¶Á³öÕÚ¹âÌõͨ¹ý¹âµçÃŵÄʱ¼ä¡÷t=2.0¡Á10-2s£¬Ôò»¬¿é¾¹ý¹âµçÃÅʱµÄ˲ʱËÙ¶ÈΪ______m/s£®ÔÚ±¾´ÎʵÑéÖл¹ÐèÒª²âÁ¿µÄÎïÀíÁ¿ÓУº¹³ÂëµÄÖÊÁ¿m¡¢______ºÍ______£¨ÎÄ×Ö˵Ã÷²¢ÓÃÏàÓ¦µÄ×Öĸ±íʾ£©£®
¢Û±¾ÊµÑéͨ¹ý±È½Ï______ºÍ______ÔÚʵÑéÎó²îÔÊÐíµÄ·¶Î§ÄÚÏàµÈ£¨ÓòâÁ¿µÄÎïÀíÁ¿·ûºÅ±íʾ£©£¬´Ó¶øÑéÖ¤ÁËϵͳµÄ»úеÄÜÊغ㣮
£¨1£©Óα꿨³ßµÄ¶ÁÊýµÈÓÚ10mm+0.50¡Á10mm=10.50mm£¬ÂÝÐý²â΢Æ÷µÄ¶ÁÊýµÈÓÚ7.5mm+0.01¡Á0.0mm=7.500mm£®
£¨2£©¿ªÍ¨ÆøÔ´£¬»¬¿é·ÅÖÃÔÚµ¼¹ìÉÏÄܱ£³Ö¾²Ö¹£¬ÔòÖªµ¼¹ìˮƽ£®
»¬¿é¾¹ý¹âµçÃÅʱµÄ˲ʱËÙ¶Èv=
=
m/s=0.25m/s£®
ʵÑéÑé֤ϵͳ»úеÄÜÊغ㣬ϵͳ¶¯ÄܵÄÔö¼ÓÁ¿¡÷Ek=
(M+m)v2£¬¡÷Ep=mgL£¬ÅжÏ
(M+m)v2ÓëmgLÔÚÎó²îÔÊÐíµÄ·¶Î§ÄÚÊÇ·ñÏàµÈ£¬ËùÒÔ±¾ÊµÑ黹ÐèÒª²âÁ¿µÄÎïÀíÁ¿ÓУº¹³ÂëµÄÖÊÁ¿m£¬»¬¿éµÄÖÊÁ¿M£¬³õʱ»¬¿éÓë¹âµçÃżä¾àÀëL£®
¹Ê´ð°¸Îª£º£¨1£©10.50 7.500
£¨2£©¢Ù¿ªÍ¨ÆøÔ´£¬»¬¿é·ÅÖÃÔÚµ¼¹ìÉÏÄܱ£³Ö¾²Ö¹
¢Ú0.25 »¬¿éÖÊÁ¿M ³õʱ»¬¿éÓë¹âµçÃżä¾àÀëL
¢Û
£¨m+M£©v2 mgL
£¨2£©¿ªÍ¨ÆøÔ´£¬»¬¿é·ÅÖÃÔÚµ¼¹ìÉÏÄܱ£³Ö¾²Ö¹£¬ÔòÖªµ¼¹ìˮƽ£®
»¬¿é¾¹ý¹âµçÃÅʱµÄ˲ʱËÙ¶Èv=
d |
¡÷t |
0.50¡Á10-2 |
2¡Á10-2 |
ʵÑéÑé֤ϵͳ»úеÄÜÊغ㣬ϵͳ¶¯ÄܵÄÔö¼ÓÁ¿¡÷Ek=
1 |
2 |
1 |
2 |
¹Ê´ð°¸Îª£º£¨1£©10.50 7.500
£¨2£©¢Ù¿ªÍ¨ÆøÔ´£¬»¬¿é·ÅÖÃÔÚµ¼¹ìÉÏÄܱ£³Ö¾²Ö¹
¢Ú0.25 »¬¿éÖÊÁ¿M ³õʱ»¬¿éÓë¹âµçÃżä¾àÀëL
¢Û
1 |
2 |
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿