Ò»Áмòгºá²¨ÑØxÖáÕý·½Ïò´«²¥£¬tʱ¿Ì²¨ÐÎͼÈçͼÖеÄʵÏßËùʾ£¬´Ëʱ²¨¸ÕºÃ´«µ½Pµã£¬t£«0.6sʱ¿ÌµÄ²¨ÐÎÈçͼÖеÄÐéÏßËùʾ£¬a¡¢b¡¢c¡¢P¡¢QÊǽéÖÊÖеÄÖʵ㣬ÔòÒÔÏÂ˵·¨ÕýÈ·µÄÊÇ£¨   £©
A£®ÕâÁв¨µÄ²¨ËÙ¿ÉÄÜΪ50m/s
B£®ÖʵãaÔÚÕâ¶Îʱ¼äÄÚͨ¹ýµÄ·³ÌÒ»¶¨Ð¡ÓÚ30cm
C£®ÖʵãcÔÚÕâ¶Îʱ¼äÄÚͨ¹ýµÄ·³Ì¿ÉÄÜΪ60cm
D£®Èç¹ûT=0.8s£¬Ôòµ±t+0.5sʱ¿Ì£¬Öʵãb¡¢PµÄλÒÆÏàͬ
ACD
·ÖÎö£ºÓÉͼ¿ÉÖª²¨µÄ²¨³¤£¬¶øÓÉÁ½Áв¨µÄ²¨ÐÎͼ¿ÉµÃÁ½²¨ÐÎÏà¾àµÄʱ¼äÓëÖÜÆڵĹØϵ£¬Ôò¿ÉµÃ³ö²¨Ëٵıí´ïʽ£»Óɲ¨ËÙ¿ÉÖªÖÜÆڵıí´ïʽ£¬Ôò¿ÉµÃ³öÖʵãµÄ·³Ì¼°Î»ÒÆ£®
½â´ð£º½â£ºA¡¢ÓÉͼ¿ÉÖª£¬²¨µÄ²¨³¤Îª40m£»Á½Áв¨Ïà¾à0.6s=£¨n+£©T£¬¹ÊÖÜÆÚT=£» 
²¨ËÙv=£¨4n+3£©m/s=£¨4n+3£©£¬µ±n=0ʱ£¬v=50m/sʱ£¬¹ÊAÕýÈ·£»
B¡¢ÖʵãaÔÚƽºâλÖÃÉÏÏÂÕñ¶¯£¬Õñ¶¯µÄ×îÉÙʱ¼äΪT£¬¹ÊÕñ·ù×îСΪ30cm£¬¹ÊB´íÎó£»
C¡¢cµÄ·³ÌΪ60cm˵Ã÷cÕñ¶¯ÁË1.5¸öÖÜÆÚ£¬Ôò¿ÉÓУº+1.5T=0.6£¬¼´+=0.6£¬½âµÃ£¬n=0ʱÂú×ãÌõ¼þ£¬¹ÊCÕýÈ·£»
D¡¢ÔÚ t ʱ¿Ì£¬Òò²¨ÑØXÖáÕý·½Ïò´«²¥£¬ËùÒÔ´ËʱÖʵãPÊÇÏòÉÏÕñ¶¯µÄ£¬¾­0.5Ãëºó£¬PÊÇÕýÔÚÏòÏÂÕñ¶¯£¨¸ºÎ»ÒÆ£©£¬ÊǾ­¹ýƽºâλÖúóÏòÏÂÔ˶¯0.1Ã룻
¶øÖʵãbÊÇÕýÔÚÏòÉÏÕñ¶¯µÄ£¨¸ºÎ»ÒÆ£©£¬Êǵ½´ï×îµÍµãºóÏòÉÏÔ˶¯0.1Ã룬ÒòΪ0.2ÃëµÈÓÚ£¬¿É¼û´ËʱÁ½¸öÖʵãµÄλÒÆÊÇÏàͬµÄ£® ¹ÊDÕýÈ·£»
¹ÊÑ¡ACD£®
µãÆÀ£º±¾Ì⿼²éÁ˲¨µÄ¶à½âÐÔÒÔ¼°Õñ¶¯µÄÐÔÖÊ£¬ÄѶȽϴó£¬ÌرðҪעÒâÀí½âD´ð°¸ÖмòгÔ˶¯µÄ¶Ô³ÆÐÔ£¬PºÍbÕýºÃ´¦ÔÚÁËͬһµã£¬µ«ÊÇ·½ÏòÇ¡ºÃÏà·´£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºµ¥Ñ¡Ìâ

Ò»ÁкᲨ£¬Ä³Ê±¿ÌµÄ²¨ÐÎͼÈçͼËùʾ¡£Èô´ËʱֻÓÐM¡¢NÖ®¼äµÄÖʵãÔÚÕñ¶¯£¬ÖÜÆÚΪT£¬ÆäÖÐQµãÏòÏÂÔ˶¯£¬ÔòÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ
A£®²¨Ô´ÊÇM£¬Óɲ¨Ô´ÆðÕñʱ¿Ì¿ªÊ¼¼Æʱ£¬PµãÒÑÕñ¶¯ÁË3T/4
B£®²¨Ô´ÊÇM£¬Óɲ¨Ô´ÆðÕñʱ¿Ì¿ªÊ¼¼Æʱ£¬PµãÒÑÕñ¶¯ÁËT/4
C£®²¨Ô´ÊÇN£¬Óɲ¨Ô´ÆðÕñʱ¿Ì¿ªÊ¼¼Æʱ£¬PµãÒÑÕñ¶¯ÁËT/4
D£®²¨Ô´ÊÇN£¬Óɲ¨Ô´ÆðÕñʱ¿Ì¿ªÊ¼¼Æʱ£¬PµãÒÑÕñ¶¯ÁË3T/4

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£º¼ÆËãÌâ

£¨13·Ö£©Ò»ÁкᲨÑØÖ±ÏßÔڿռ䴫²¥£¬Ä³Ò»Ê±¿ÌÖ±ÏßÉÏÏà¾àΪdµÄM¡¢NÁ½µã¾ù´¦ÔÚƽºâλÖã¬ÇÒM¡¢NÖ®¼ä½öÓÐÒ»¸ö²¨·å£¬Èô¾­¹ýʱ¼ät£¬NÖʵãÇ¡ºÃµ½´ï²¨·åλÖã¬Ôò¸ÃÁв¨¿ÉÄܵIJ¨ËÙÊǶàÉÙ

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºµ¥Ñ¡Ìâ

ÈçͼËùʾΪһÁÐÑØXÖáÕý·½Ïò´«²¥µÄ¼òгºá²¨ÔÚt=0ʱµÄ²¨ÐÎͼ£¬ÖʵãP¡¢QµÄƽºâλÖ÷ֱðλÓÚx=0.20mºÍx=0.60m´¦¡£Èô²¨µÄ´«²¥ËÙ¶ÈΪ2.0m/s£¬ÔòÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ
A£®ÔÙ¾­¹ýt=-0.40s£¬ÖʵãPÏòÓÒÒƶ¯0.80m
B£®ÔÙ¾­¹ýt=0.40s£¬ÖʵãPÕýͨ¹ý×Ô¼ºµÄƽºâλÖã¬Õâ¶Îʱ¼äÄÚËüͨ¹ýµÄ·³ÌΪ0.40m
C£®ÔÚt=0ʱ¿ÌÖ®ºó£¬ÖʵãQºÍPµÄλÒƺÍËٶȵķ½Ïò×ÜÊÇÏà·´µÄ
D£®ÔÙ¾­¹ýt=0.10s£¬ÔÚxÖáÉÏ0~0.60m·¶Î§ÄÚ²¨ÐÎͼÓët=0ʱµÄ²¨ÐÎͼÏàͬ

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºµ¥Ñ¡Ìâ

Ò»Áмòгºá²¨ÒÔµÄËÙ¶ÈÑØxÖḺ·½Ïò´«²¥£¬ÏÂͼÊÇʱ¿ÌµÄ²¨ÐÎͼ£¬ÏÂÁÐÃèÊöijÖʵãÕñ¶¯µÄͼÏóÕýÈ·µÄÊÇ£¨    £©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºµ¥Ñ¡Ìâ

Ò»Áмòгºá²¨ÔÚt=0ʱµÄ²¨ÐÎͼÈçÏ£¬Èô´Ë²¨µÄÖÜÆÚΪ0.2s£¬ÔòÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ                      
A£®ÔÙ¾­¹ý¡÷t=0.4sÖʵãPÏòÓÒÒƶ¯0.8m
B£®ÔÙ¾­¹ý¡÷t="0." 4sÖʵãPÈÔÔÚ×Ô¼ºÆ½ºâλÖÃ
C£®ÔÚ²¨µÄ´«²¥¹ý³ÌÖÐÖʵãQÓëPµÄÕñ¶¯Çé¿ö×ÜÊÇÏàͬµÄ
D£®ÔÙ¾­¹ý¡÷t=0.2sºóµÄ²¨ÐÎÓët=0ʱµÄ²¨ÐÎÊDz»Í¬µÄ

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºµ¥Ñ¡Ìâ

ͼΪһÁмòгºá²¨µÄ²¨ÐÎͼ£¬ÆäÖÐʵÏßÊÇt1=1.0sʱµÄ²¨ÐΣ¬ÐéÏßÊÇt2=2.0sʱµÄ²¨ÐΣ¬ÒÑÖª£¨t2 -t1£©Ð¡ÓÚÒ»¸öÖÜÆÚ¡£¹ØÓÚÕâÁв¨£¬ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ
A£®ËüµÄÕñ·ùΪ10cm£¬²¨³¤Îª8m
B£®ËüÒ»¶¨ÊÇÏòxÖáÕý·½Ïò´«²¥
C£®ËüµÄÖÜÆÚ¿ÉÄÜÊÇ0.8s
D£®ËüµÄ´«²¥ËٶȿÉÄÜÊÇ2 m/ s

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£º¼ÆËãÌâ

Èçͼ¼×ËùʾΪһÁмòгºá²¨ÔÚt=6.0¡Á10£­2sʱµÄ²¨ÐÎͼ£¬Í¼ÒÒÊÇÕâÁв¨ÖÐPÖʵãµÄÕñ¶¯Í¼Ïó¡£PµãµÄƽºâλÖÃ×ø±êÊÇx=10m¡£

£¨1£©ÊÔÇóÕâÁв¨µÄ´«²¥ËٶȺʹ«²¥·½Ïò£»
£¨2£©ÊÔÇóPÖʵãÔÚt=4¡Á10£­2sʱ¿ÌµÄλÒÆ£»
£¨3£©ÊÔÔÚͼ¼×Öл­³öt=9.5¡Á10£­2sʱµÄ²¨ÐÎͼÏó¡£               

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºµ¥Ñ¡Ìâ

´¦ÓÚ×ø±êÔ­µãµÄ²¨Ô´²úÉúÒ»ÁÐÑØxÖáÕý·½Ïò´«²¥µÄ¼òгºá²¨£¬²¨ËÙv=200m/s¡£ÒÑÖªt=0ʱ£¬²¨¸Õ´«²¥µ½x=40m´¦£¬²¨ÐÎÈçͼËùʾ¡£ÔÚx=400m´¦ÓÐÒ»½ÓÊÜÆ÷(ͼ2ÖÐδ»­³ö)£¬ÔòÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ
A£®²¨Ô´¿ªÊ¼Õñ¶¯Ê±·½ÏòÑØyÖáÕý·½Ïò
B£®½ÓÊÜÆ÷ÔÚt=2sʱ²ÅÄܽÓÊܴ˲¨
C£®´Ót=0¿ªÊ¼¾­0.15s£¬x=40mµÄÖʵãÔ˶¯µÄ·³ÌΪ0.6m
D£®Èô²¨Ô´ÏòxÖáÕý·½ÏòÔÈËÙÔ˶¯£¬½ÓÊÜÆ÷ÊÕµ½²¨µÄƵÂÊΪ10Hz

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸