Èçͼ12-3-7Ëùʾ£¬1£¬2£¬3£¬¡­¡­£¬10¸÷µãÖ®¼äµÄ¾àÀë¾ùÊÇ1 m£¬µ±t=0ʱ£¬µã1¿ªÊ¼ÏòÉÏÕñ¶¯£¬¾­0.1 sµÚÒ»´Î´ïµ½×î´óλÒÆ£¬¶øÕñ¶¯ÏòÓÒ´«²¥ÖÁµã3£¬ÔòÒÔϽáÂÛÕýÈ·µÄÊÇ(    )

ͼ12-3-7

A.²¨µÄ´«²¥ËÙ¶ÈÊÇ10 m/s£¬ÖÜÆÚÊÇ0.4 s

B.²¨µÄƵÂÊÊÇ2.5 Hz£¬²¨³¤ÊÇ8 m

C.ÔÙ¾­0.1 s²¨´«²¥µ½µã5£¬µã4´ïµ½×î´óλÒÆ

D.´Óµã1¿ªÊ¼¼´Õñ¶¯¼Æʱ£¬²¨´«²¥µ½µã10ʱ£¬¾­¹ý0.45 s£¬¾­¹ý0.45 s£¬µã8´ïµ½×î´óλÒÆ

½âÎö£ºÓÉÌâÒâÖª£º=0.1  ¡àT=0.4 s  f==2.5 Hz²¨³¤Îª£º¦Ë=4¡Á2 m=8 m

    ²¨ËÙΪ£ºv==20 m/s¿É¼ûA´íB¶Ô£¬ÔÙ¾­0.1 s£¬Ðγɰë¸ö²¨£¬²¨Ó¦Ê¹µ½µã5£¬µã3Ó¦ÔÚ×î´óλÒÆ£¬¹ÊC´í¡£²¨Ê¹µ½µã10ÓÃʱΪ£ºt==0.45 s£¬µã8¾àµã10 Ϊ¦Ë£¬Ó¦´¦ÓÚ²¨·å£¬¹ÊD¶Ô¡£

´ð°¸£ºBD

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

Èçͼ12-3-7Ëùʾ£¬Ò»¸ùÕŽôµÄˮƽµ¯ÐÔ³¤ÉþÉϵÄa¡¢bÁ½µãÏà¾à14.0 cm,bµãÔÚaµãµÄÓÒ·½£¬µ±Ò»Áмòгºá²¨Ñش˳¤ÉþÏòÓÒ´«²¥Ê±£¬ÈôaµãµÄλÒÆ´ïµ½Õý·½Ïò×î´óʱ£¬bµãµÄλÒÆǡΪÁ㣬ÇÒÏòÏÂÔ˶¯£¬¾­¹ý1.00 sºó£¬aµãµÄλÒÆΪÁ㣬ÇÒÏòÏÂÔ˶¯£¬¶øbµãµÄλÒÆ´ïµ½¸º¼«´ó.ÔòÕâ

Ò»¼òг²¨µÄ²¨ËÙ¿ÉÄÜÊÇ£¨    £©

ͼ12-3-7

A.4.67 m/s        B.6 m/s          C.10 m/s           D.14 m/s

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

Èçͼ12-3-7Ëùʾ£¬LÊǵç¸Ð×ã¹»´óµÄÏßȦ£¬ÆäÖ±Á÷µç×è¿ÉºöÂÔ²»¼Æ£¬D1ºÍD2ÊÇÁ½¸öÏàͬµÄµÆÅÝ.Èô½«¿ª¹ØS±ÕºÏ£¬´ýµÆÅÝÁÁ¶ÈÎȶ¨ºó£¬ÔٶϿª¿ª¹ØS£¬Ôò£¨    £©

ͼ12-3-7

A.S±ÕºÏʱ£¬D2ÏÈÁÁ£¬È»ºóD1ÔÙÁÁ

B.S±ÕºÏʱ£¬D1ºÜÁÁ£¬D2Öð½¥ÁÁ£¬×îºóD1ºÍD2Ò»ÑùÁÁ

C.S¶Ï¿ªÊ±£¬D2Á¢¼´Ï¨Ãð£¬D1»á¸üÁÁһϲÅϨÃð

D.S¶Ï¿ªÊ±£¬D1Á¢¼´Ï¨Ãð£¬D2»á¸üÁÁÒ»ÏÂÔÙϨÃð

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

Èçͼ12-3-7Ëùʾ£¬1£¬2£¬3£¬¡­¡­£¬10¸÷µãÖ®¼äµÄ¾àÀë¾ùÊÇ1 m£¬µ±t=0ʱ£¬µã1¿ªÊ¼ÏòÉÏÕñ¶¯£¬¾­0.1 sµÚÒ»´Î´ïµ½×î´óλÒÆ£¬¶øÕñ¶¯ÏòÓÒ´«²¥ÖÁµã3£¬ÔòÒÔϽáÂÛÕýÈ·µÄÊÇ(    )

ͼ12-3-7

A.²¨µÄ´«²¥ËÙ¶ÈÊÇ10 m/s£¬ÖÜÆÚÊÇ0.4 s

B.²¨µÄƵÂÊÊÇ2.5 Hz£¬²¨³¤ÊÇ8 m

C.ÔÙ¾­0.1 s²¨´«²¥µ½µã5£¬µã4´ïµ½×î´óλÒÆ

D.´Óµã1¿ªÊ¼¼´Õñ¶¯¼Æʱ£¬²¨´«²¥µ½µã10ʱ£¬¾­¹ý0.45 s£¬¾­¹ý0.45 s£¬µã8´ïµ½×î´óλÒÆ

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

Èçͼ12-3-7Ëùʾ£¬Ò»¸ùÕŽôµÄˮƽµ¯ÐÔ³¤ÉþÉϵÄa¡¢bÁ½µãÏà¾à14.0 cm,bµãÔÚaµãµÄÓÒ·½£¬µ±Ò»Áмòгºá²¨Ñش˳¤ÉþÏòÓÒ´«²¥Ê±£¬ÈôaµãµÄλÒÆ´ïµ½Õý·½Ïò×î´óʱ£¬bµãµÄλÒÆǡΪÁ㣬ÇÒÏòÏÂÔ˶¯£¬¾­¹ý1.00 sºó£¬aµãµÄλÒÆΪÁ㣬ÇÒÏòÏÂÔ˶¯£¬¶øbµãµÄλÒÆ´ïµ½¸º¼«´ó.ÔòÕâ

Ò»¼òг²¨µÄ²¨ËÙ¿ÉÄÜÊÇ£¨    )

ͼ12-3-7

A.4.67 m/s        B.6 m/s          C.10 m/s           D.14 m/s

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸