ÌâÄ¿ÄÚÈÝ
![](http://thumb.1010pic.com/pic3/upload/images/201405/170/dbdd2d99.png)
A¡¢¸ÃÁв¨ÑØxÖáÕý·½Ïò´«²¥ | B¡¢ÔÚ0.2s¡«0.4sµÄʱ¼äÄÚAÖʵãµÄËÙ¶ÈÏÈÔö´óºó¼õС | C¡¢Èô´Ë²¨Óöµ½ÁíÒ»Áмòгºá²¨²¢·¢ÉúÎȶ¨¸ÉÉæÏÖÏó£¬ÔòËùÓöµ½µÄ²¨µÄƵÂÊΪ2.5Hz | D¡¢Èô¸Ã²¨Óöµ½Ò»ÕÏ°ÎïÄÜ·¢ÉúÃ÷ÏÔµÄÑÜÉäÏÖÏó£¬Ôò¸ÃÕÏ°ÎïµÄ³ß´çÒ»¶¨±È40cm´óºÜ¶à | E¡¢´Ó¸Ãʱ¿Ìʱ£¬ÔÙ 0.4sÖʵãAͨ¹ýµÄ·³ÌΪ40cm |
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
![](http://thumb.1010pic.com/pic3/upload/images/201405/52/803b4fb8.png)
A¡¢ÕâÁв¨µÄÕñ·ùÊÇ20cm | B¡¢ÕâÁв¨ÑØxÖáÕý·½Ïò´«²¥µÄ | C¡¢ÔÚt=0.1sʱ£¬x=2cm´¦µÄÖʵãpËÙ¶ÈÑØyÖḺ·½Ïò | D¡¢¾¹ý0.18s£¬x=2cm´¦µÄÖʵãpͨ¹ý·³ÌΪ0.6m |
![](http://thumb.1010pic.com/pic3/upload/images/201406/30/627565ce.png)
A¡¢²¨µÄÖÜÆÚΪ0.56s | B¡¢²¨µÄËÙ¶ÈΪ60cm/s | C¡¢t=0ʱcÖʵãµÄ»Ø¸´·½ÏòÊÇyÖḺÏò | D¡¢t=0.7sʱa£¬bÁ½ÖʵãËٶȷ½ÏòÏàͬ |
Ò»Õñ¶¯ÖÜÆÚΪT£¬Î»ÓÚx=0´¦µÄ²¨Ô´´ÓƽºâλÖÿªÊ¼ÑØyÖáÕý·½Ïò×ö¼òгÔ˶¯£¬¸Ã²¨Ô´²úÉúµÄ¼òгºá²¨ÑØxÖáÕý·½Ïò´«²¥£¬²¨ËÙΪv£¬¹ØÓÚÔÚx=
´¦µÄÖʵãP£¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
5vT |
2 |
A¡¢ÖʵãPÕñ¶¯ÖÜÆÚΪT£¬ËٶȵÄ×î´óֵΪv |
B¡¢Èôijʱ¿ÌÖʵãPµÄËٶȷ½ÏòÑØyÖḺ·½Ïò£¬Ôò¸Ãʱ¿Ì²¨Ô´Ëٶȷ½ÏòÑØyÖáÕý·½Ïò |
C¡¢ÖʵãP¿ªÊ¼Õñ¶¯µÄ·½ÏòÑØyÖḺ·½Ïò |
D¡¢Èôijʱ¿Ì²¨Ô´ÔÚ²¨·å£¬ÔòÖʵãPÒ»¶¨ÔÚ²¨¹È |
E¡¢Èôijʱ¿Ì²¨Ô´ÔÚ²¨¹È£¬ÔòÖʵãPÒ»¶¨ÔÚ²¨¹È |
ºþÃæÉÏÍ£×ÅABÁ½ÌõС´¬£¬ËüÃÇÏà¾à30m£¬Ò»ÁÐË®²¨ÕýÔÚºþÃæÉÏÑØABÁ¬Ïߵķ½Ïò´«²¥£¬Ã¿ÌõС´¬Ã¿·ÖÖÓÉÏϸ¡¶¯20´Î£®µ±A´¬Î»ÓÚ²¨·åʱ£¬B´¬ÔÚ²¨¹È£¬Á½´¬Ö®¼ä»¹ÓÐÒ»¸ö²¨·å£¬£¨¡¡¡¡£©
A¡¢Ë®²¨µÄ²¨³¤Îª60m | ||
B¡¢Ë®²¨µÄ²¨³¤Îª20m | ||
C¡¢Ë®²¨µÄ²¨ËÙΪ20m/s | ||
D¡¢Ë®²¨µÄ²¨ËÙΪ
|
![](http://thumb.1010pic.com/pic3/upload/images/201405/30/c08db496.png)
A¡¢t=0.5sʱSµã¿ªÊ¼Õñ¶¯ | B¡¢Qµã¿ªÊ¼Õñ¶¯Ê±£¬Sµã¸ÕºÃ´¦ÓÚƽºâλÖà | C¡¢Sµã¿ªÊ¼Õñ¶¯ºó£¬SÓëPµÄÕñ¶¯Çé¿öʱ¿ÌÏà·´ | D¡¢ÈôQ´¦ÖÃÒ»ÓëPµãÕñ¶¯Çé¿öÍêÈ«ÏàͬµÄ²¨Ô´£¬ÔòSµãΪÕñ¶¯¼ÓÇ¿µã |
¹«Â·ÉϵÄÀ×´ï²âËÙÒǵŤ×÷ÔÀíÊÇÀûÓ㨡¡¡¡£©
A¡¢²¨µÄ·´ÉäºÍ¶àÆÕÀÕЧӦ | B¡¢²¨µÄ¸ÉÉæºÍ¶àÆÕÀÕЧӦ | C¡¢²¨µÄ¸ÉÉæºÍ²¨µÄ·´Éä | D¡¢²¨µÄ·´ÉäºÍ¹²Õñ |