ÌâÄ¿ÄÚÈÝ
Ò»Áмòгºá²¨£¬Ä³Ê±¿ÌµÄ²¨ÐÎͼÏóÈçͼ¼×Ëùʾ£¬´Ó¸Ãʱ¿Ì¿ªÊ¼¼Æʱ£¬²¨ÉÏAÖʵãµÄÕñ¶¯Í¼ÏóÈçͼÒÒËùʾ£¬Ôò£¨¡¡¡¡£©
·ÖÎö£ºÖʵãÕñ¶¯µÄÖÜÆÚµÈÓÚ²¨µÄÖÜÆÚ£¬¸ù¾Ý¸ÉÉæµÄÌõ¼þÅжÏÄÜ·ñ·¢ÉúÎȶ¨µÄ¸ÉÉæÏÖÏó£®µ±²¨µÄ²¨³¤´óÓÚÕÏ°ÎïµÄ³ß´ç£¬»òÓëÕÏ°Îï³ß´çÏ൱£¬¿ÉÒÔ·¢ÉúÃ÷ÏÔµÄÑÜÉäÏÖÏó£®
½â´ð£º½â£ºA¡¢²¨µÄ²¨³¤¦Ë=20m£¬ÖÜÆÚT=0.8s£¬Ôò²¨µÄƵÂÊf=
=1.25Hz£®²úÉúÎȶ¨¸ÉÉæÏÖÏóµÄÌõ¼þÊÇÁ½Áв¨µÄƵÂÊÏàµÈ£®¹ÊAÕýÈ·£®
B¡¢ÈôËùÓöµÄ²¨µÄ²¨³¤µÈÓÚ20m£¬ÒòΪ²¨ËÙ²»Ò»¶¨ÏàµÈ£¬ÔòƵÂʲ»Ò»¶¨ÏàµÈ£®¹ÊB´íÎó£®
C¡¢µ±²¨µÄ²¨³¤´óÓÚÕÏ°ÎïµÄ³ß´ç£¬»òÓëÕÏ°Îï³ß´çÏ൱£¬¿ÉÒÔ·¢ÉúÃ÷ÏÔµÄÑÜÉäÏÖÏó£®Ôò¸Ã²¨ËùÓöµ½µÄÕÏ°ÎïµÄ³ß´çСÓÚ20m£®¹ÊC´íÎó£®
D¡¢ÒòΪAÖʵãµÄÕñ¶¯·½ÏòÏòÉÏ£¬Ôò²¨ÑØxÖḺ·½Ïò´«²¥£¬ÖªPÖʵãÏòÏÂÕñ¶¯£¬ÖªÖʵãP±ÈÖʵãQÏȻص½Æ½ºâλÖ㮹ÊDÕýÈ·£®
¹ÊÑ¡AD£®
1 |
T |
B¡¢ÈôËùÓöµÄ²¨µÄ²¨³¤µÈÓÚ20m£¬ÒòΪ²¨ËÙ²»Ò»¶¨ÏàµÈ£¬ÔòƵÂʲ»Ò»¶¨ÏàµÈ£®¹ÊB´íÎó£®
C¡¢µ±²¨µÄ²¨³¤´óÓÚÕÏ°ÎïµÄ³ß´ç£¬»òÓëÕÏ°Îï³ß´çÏ൱£¬¿ÉÒÔ·¢ÉúÃ÷ÏÔµÄÑÜÉäÏÖÏó£®Ôò¸Ã²¨ËùÓöµ½µÄÕÏ°ÎïµÄ³ß´çСÓÚ20m£®¹ÊC´íÎó£®
D¡¢ÒòΪAÖʵãµÄÕñ¶¯·½ÏòÏòÉÏ£¬Ôò²¨ÑØxÖḺ·½Ïò´«²¥£¬ÖªPÖʵãÏòÏÂÕñ¶¯£¬ÖªÖʵãP±ÈÖʵãQÏȻص½Æ½ºâλÖ㮹ÊDÕýÈ·£®
¹ÊÑ¡AD£®
µãÆÀ£º½â¾ö±¾ÌâµÄ¹Ø¼üÖªµÀÕñ¶¯Ó벨¶¯µÄ¹Øϵ£¬ÒÔ¼°ÖªµÀ²úÉúÎȶ¨¸ÉÉæºÍÑÜÉäµÄÌõ¼þ£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
ÈçͼÖÐʵÏßÊÇÒ»Áмòгºá²¨ÔÚijʱ¿ÌµÄ²¨ÐÎͼ£¬ÐéÏßÊǾ¹ý 0.2s ʱ¸Ã²¨µÄ²¨ÐÎͼ£®ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A¡¢²¨Ô´µÄÕñ¶¯ÖÜÆÚ¿ÉÄÜÊÇ0.8s | B¡¢²¨Ô´µÄÕñ¶¯ÖÜÆÚ¿ÉÄÜÊÇ1.6s | C¡¢²¨ËÙÒ»¶¨Îª5m/s | D¡¢ÔÚÈκÎÒ»¸öÖÜÆÚÄÚÕñ¶¯ÖʵãµÄλÒƶ¼Îª8m |