ÌâÄ¿ÄÚÈÝ

£¨2010?Т¸Ðһģ£©ÔÚ×ø±êÔ­µãµÄ²¨Ô´²úÉúÒ»ÁÐÑØxÖáÕý·½Ïò´«²¥µÄ¼òгºá²¨£¬²¨ËÙv=200m/s£¬ÒÑÖªt=0ʱ£¬²¨¸ÕºÃ´«²¥µ½x=40m´¦£¬ÈçͼËùʾ£®ÔÚx=400m´¦ÓÐÒ»½ÓÊÕÆ÷£¨Í¼ÖÐδ»­³ö£©£®ÔòÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
·ÖÎö£º¼òг²¨´«²¥¹ý³ÌÖУ¬½éÖÊÖи÷ÖʵãµÄÆðÕñ·½ÏòÓ벨ԴµÄÆðÕñ·½ÏòÏàͬ£¬ÓÉͼÖÐx=40m´¦ÖʵãµÄÕñ¶¯·½Ïò¶Á³ö¸÷ÖʵãµÄÆðÕñ·½Ïò£¬¼´¿ÉÅжϳö²¨Ô´¿ªÊ¼Õñ¶¯Ê±µÄ·½Ïò£®²¨ÔÚ½éÖÊÖÐÔÈËÙ´«²¥£¬ÓÉt=
x
v
Çó³ö²¨´«µ½½ÓÊÕÆ÷µÄʱ¼ä£®ÖʵãÔÚÒ»¸öÖÜÆÚÄÚͨ¹ýµÄ·³ÌÊÇËĸöÕñ·ù£¬¸ù¾Ýʱ¼äÓëÖÜÆڵĹØϵ£¬Çó³öÖʵãÔ˶¯µÄ·³Ì£®Èô²¨Ô´ÏòxÖáÕý·½ÏòÔ˶¯£¬½ÓÊÕÆ÷ÊÕµ½²¨µÄƵÂʼõС£®
½â´ð£º½â£º
A¡¢²¨ÑØxÖáÕý·½Ïò´«²¥£¬ÔËÓò¨ÐÎƽÒÆ·¨¿ÉÖª£¬ÓÉͼÖÐx=40m´¦ÖʵãµÄÆðÕñ·½ÏòΪÑØyÖḺ·½Ïò£¬Ôò²¨Ô´¿ªÊ¼Õñ¶¯Ê±·½ÏòÑØyÖḺ·½Ïò£®¹ÊA´íÎó£®
B¡¢ÓÉͼ¶Á³ö²¨³¤Îª¦Ë=20m£¬ÖÜÆÚΪT=
¦Ë
v
=
20
200
s=0.1s£¬ÓÉÓÚt=0.15s=1.5T£¬´Ót=0¿ªÊ¼¾­0.15sʱ£¬x=40mµÄÖʵãÔ˶¯µÄ·³ÌS=1.5¡Á4A=6¡Á10cm=0.6m£®¹ÊBÕýÈ·£®
C¡¢½ÓÊÕÆ÷Óëx=40mµÄ¾àÀëΪ¡÷x=400m-40m=360m£¬²¨´«µ½½ÓÊÕÆ÷µÄʱ¼äΪt=
360
200
=1.8s£®¹ÊC´íÎó£®
D¡¢¸Ã²¨µÄƵÂÊΪf=
1
T
=10Hz£¬Èô²¨Ô´ÏòxÖáÕý·½ÏòÔ˶¯£¬²¨Ô´Óë½ÓÊÕÆ÷¼äµÄ¾àÀë¼õС£¬¸ù¾Ý¶àÆÕÀÕЧӦ¿ÉÖª£¬½ÓÊÕÆ÷ÊÕµ½²¨µÄƵÂÊÔö´ó£¬½«´óÓÚ10Hz£®¹ÊD´íÎó£®
¹ÊÑ¡B
µãÆÀ£º¼òг²¨Ò»¸ö»ù±¾ÌصãÊǽéÖÊÖи÷ÖʵãµÄÆðÕñ·½Ïò¶¼Ó벨ԴµÄÆðÕñ·½ÏòÏàͬ£®²¨Ô´Óë½ÓÊÕÆ÷µÄ¾àÀëÔö´óʱ£¬½ÓÊÕÆ÷½ÓÊÕµ½µÄ²¨µÄƵÂʽ«±äС£»²¨Ô´Óë½ÓÊÕÆ÷µÄ¾àÀë¼õСʱ£¬½ÓÊÕÆ÷½ÓÊÕµ½µÄ²¨µÄƵÂʽ«±ä´ó£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

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

¾«Ó¢¼Ò½ÌÍø