ÌâÄ¿ÄÚÈÝ

¡¾ÌâÄ¿¡¿Ð¡Ã÷ÔÚ¡°²âС³µµÄƽ¾ùËÙ¶È¡±µÄʵÑéÖУ¬Éè¼ÆÁËÈçͼ9ËùʾµÄʵÑé×°ÖãºÐ¡³µ´Ó´ø¿Ì¶È£¨Ã¿Ð¡Ò»¸ñΪ1 cm£©µÄÐ±Ãæ¶¥¶ËÓɾ²Ö¹Ï»¬£¬Í¼ÖеÄԲȦÊÇС³µµ½´ïA¡¢B¡¢CÈý´¦Ê±µç×Ó±íµÄÏÔʾ£¨Êý×Ö·Ö±ð±íʾ¡°·Ö£ºÃ롱£©£¬Ôò

£¨1£©¸ÃʵÑéÊǸù¾Ý¹«Ê½½øÐвâÁ¿µÄ.
£¨2£©ÊµÑéÖÐΪÁË·½±ã¼ÆÊ±£¬Ó¦Ê¹Ð±ÃæµÄÆÂ¶È½Ï£¨Ìî¡°´ó¡±»ò¡°Ð¡¡±£©.
£¨3£©SAB£½cm£¬tAB£½s£¬vAB£½m/s.
£¨4£©ÊµÑéǰ±ØÐëѧ»áÊìÁ·Ê¹Óõç×Ó±í.Èç¹ûÈÃС³µ¹ýÁËAµãºó²Å¿ªÊ¼¼ÆÊ±£¬Ôò»áʹËù²âAC¶ÎµÄƽ¾ùËÙ¶ÈvACÆ«£¨Ìî¡°´ó¡±»ò¡°Ð¡¡±£©.

¡¾´ð°¸¡¿
£¨1£©v=
£¨2£©Ð¡
£¨3£©4,2,0.02
£¨4£©´ó
¡¾½âÎö¡¿£¨1£©¸ÃʵÑé²âС³µÆ½¾ùËٶȵÄʵÑéÔ­ÀíÊÇv=£»
£¨2£©Ð±ÃæÆÂ¶ÈÔ½´ó£¬Ð¡³µÑØÐ±ÃæÏòϼÓËÙÔ˶¯Ô½¿ì£¬¹ýijµãµÄʱ¼ä»áÔ½¶Ì£¬¼ÆÊ±»áÔ½À§ÄÑ£¬ËùÒÔΪʹ¼ÆÊ±·½±ã£¬Ð±ÃæÆÂ¶ÈÓ¦½ÏС£»
£¨3£©ÓÉͼ֪£¬Ð¡³µÍ¨¹ýABµÄ·³ÌΪsAB =4cm£»Ð¡³µÍ¨¹ýAB¶ÎµÄʱ¼ätAB=5£º08-5£º06=2s£»Ð¡³µÍ¨¹ýABµÄƽ¾ùËÙ¶ÈΪvAB =sAB/tAB=0.04m/2s=0.02m/s£»
£¨4£©Èç¹ûÈÃС³µµÄ³µÎ²¹ýÁËAµã²Å¿ªÊ¼¼ÆÊ±£¬¼ÆÊ±Íí£¬Ëù¼ÆÊ±¼äƫС£¬Óɹ«Ê½v=s/t¿ÉÖª£¬Ëã³öµÄËÙ¶ÈÆ«´ó.
ËùÒÔ´ð°¸ÊÇ£º£¨1£©v=£¨2£©Ð¡£¨3£©4£»2£»0.02£¨4£©´ó

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø