ÌâÄ¿ÄÚÈÝ
¹âµç¼ÆʱÆ÷ÊÇÒ»ÖÖÑо¿ÎïÌåÔ˶¯Çé¿öµÄ³£ÓüÆʱÒÇÆ÷£¬Æä½á¹¹ÈçÏÂͼ(a)Ëùʾ£¬a¡¢b·Ö±ðÊǹâµçÃŵļ¤¹â·¢ÉäºÍ½ÓÊÕ×°Ö㬵±ÓÐÎïÌå´Óa¡¢b¼äͨ¹ýʱ£¬¹âµç¼ÆʱÆ÷¾Í¿ÉÒÔ¾«È·µØ°ÑÎïÌå´Ó¿ªÊ¼µ²¹âµ½µ²¹â½áÊøµÄʱ¼ä¼Ç¼ÏÂÀ´£®ÏÖÀûÓÃͼ(b)ËùʾµÄ×°ÖòâÁ¿»¬¿éºÍ³¤Ä¾°å¼äµÄ¶¯Ä¦²ÁÒòÊý£¬Í¼ÖÐMNÊÇˮƽ×ÀÃ棬QÊdz¤Ä¾°åÓë×ÀÃæµÄ½Ó´¥µã£¬1ºÍ2Êǹ̶¨ÔÚ³¤Ä¾°åÉÏÊʵ±Î»ÖõÄÁ½¸ö¹âµçÃÅ£¬ÓëÖ®Á¬½ÓµÄÁ½¸ö¹âµç¼ÆʱÆ÷ûÓл³ö£¬³¤Ä¾°å¶¥¶ËPµãÐüÓÐһǦ´¸£¬ÊµÑéʱ£¬Èû¬¿é´Ó³¤Ä¾°åµÄ¶¥¶Ë»¬Ï£¬¹âµçÃÅ1¡¢2¸÷×ÔÁ¬½ÓµÄ¼ÆʱÆ÷ÏÔʾµÄµ²¹âʱ¼ä·Ö±ðΪ1.0¡Á10£2 sºÍ4.0¡Á10£3 s£®Óþ«¶ÈΪ0.05 mmµÄÓα꿨³ß²âÁ¿»¬¿éµÄ¿í¶ÈΪd£¬ÆäʾÊýÈçͼ(c)Ëùʾ£®
(1)»¬¿éµÄ¿í¶Èd£½________cm.
(2)»¬¿éͨ¹ý¹âµçÃÅ1ʱµÄËÙ¶Èv1£½________m/s£¬»¬¿éͨ¹ý¹âµçÃÅ2ʱµÄËÙ¶Èv2£½________m/s.(½á¹û±£ÁôÁ½Î»ÓÐЧÊý×Ö)
(3)Óɴ˲âµÃµÄ˲ʱËÙ¶Èv1ºÍv2Ö»ÊÇÒ»¸ö½üËÆÖµ£¬ËüÃÇʵÖÊÉÏÊÇͨ¹ý¹âµçÃÅ1ºÍ2ʱµÄ________£¬ÒªÊ¹Ë²Ê±ËٶȵIJâÁ¿Öµ¸ü½Ó½üÓÚÕæʵֵ£¬¿É½«________µÄ¿í¶È¼õСһЩ£®
½âÎö£º¡¡(1)d£½10 mm£«0.05 mm¡Á2£½10.10 mm£½1.010 cm
(2)v1£½£½ m/s£½1.0 m/s
v2£½£½ m/s£½2.5 m/s
(3)v1¡¢v2ʵÖÊÉÏÊÇͨ¹ý¹âµçÃÅ1ºÍ2ʱµÄƽ¾ùËٶȣ¬ÒªÊ¹Ë²Ê±ËٶȵIJâÁ¿Öµ¸ü½Ó½üÓÚÕæʵֵ£¬¿É½«»¬¿éµÄ¿í¶È¼õСһЩ£®
´ð°¸£º¡¡(1)1.010¡¡(2)1.0¡¡2.5¡¡(3)ƽ¾ùËٶȡ¡»¬¿é