±±¾©Ê±¼ä2011Äê3ÔÂ11ÈÕ£¬ÈÕ±¾±¾Öݵº¸½½üº£Óò·¢ÉúÀïÊÏ9.0¼¶µØÕð£¬Ñо¿²¨¶¯¶ÔÔ¤±¨µØÕðÓÐÖØÒª×÷Óá£Í¼¼×ΪһÁмòгºá²¨ÔÚt=0.10sʱ¿ÌµÄ²¨ÐÎͼ£¬PÊÇƽºâλÖÃΪx="1" m´¦µÄÖʵ㣬QÊÇƽºâλÖÃΪx="4" m´¦µÄÖʵ㣬ͼÒÒΪÖʵãQµÄÕñ¶¯Í¼Ïó£¬Ôò
A£®t=0.05sʱ£¬ÖʵãQµÄ¼ÓËٶȴﵽÕýÏò×î´ó
B£®t=0.15sʱ£¬ÖʵãPµÄÔ˶¯·½ÏòÑØyÖḺ·½Ïò
C£®´Ót=0.10sµ½t=0.25s£¬¸Ã²¨ÑØxÖáÕý·½Ïò´«²¥ÁË6 m
D£®´Ót=0.10sµ½t=0.25s£¬ÖʵãPͨ¹ýµÄ·³ÌΪ30cm
B
ÓÉͼÒÒy-tͼÏñÖª£¬ÖÜÆÚT=0.20s£¬ÇÒÔÚt=0.10sʱQµãÔÚƽºâλÖÃÑØy¸º·½ÏòÔ˶¯£¬¿ÉÒÔÍƶϲ¨Ã»x¸º·½Ïò´«²¥£¬ËùÒÔC´í£»
t=0.05sʱ£¬ÖʵãQͼ¼×ËùʾÕýµÄ×î´óλÒÆ´¦£¬ÓÖÒò¼ÓËٶȷ½ÏòÓëλÒÆ·½ÏòÏà·´£¬´óСÓëλÒƵĴóС³ÉÕý±È£¬ËùÒÔ´ËʱQµÄ¼ÓËٶȴﵽ¸ºÏò×î´ó£¬ËùÒÔA´í£¨Ò²¿ÉÖ±½Ó´ÓͼÒÒy-tͼÏñ·ÖÎöµÃ³ö£©£»t=0.10sµ½t=0.15ʱ¼äÄÚ£¬¦¤t=0.05s=T/4£¬Pµã´Óͼ¼×ËùʾλÖÃÔ˶¯T/4ʱÕýÔÚÓÉÕý×î´óλÒÆ´¦ÏòƽºâλÖÃÔ˶¯µÄ;ÖУ¬ËÙ¶ÈÑØyÖḺ·½Ïò£¬ËùÒÔB¶Ô¡£Õñ¶¯µÄÖʵãÔÚt=1TÄÚ£¬ÖʵãÔ˶¯µÄ·³ÌΪ4A£»t=T/2£¬ÖʵãÔ˶¯µÄ·³ÌΪ2A£»µ«t=T/4£¬ÖʵãÔ˶¯µÄ·³Ì²»Ò»¶¨ÊÇ1A£»t=3T/4£¬ÖʵãÔ˶¯µÄ·³ÌÒ²²»Ò»¶¨ÊÇ3A¡£±¾ÌâÖдÓt=0.10sµ½t=0.25sÄÚ£¬¦¤t=0.15s=3T/4£¬PµãµÄÆðʼλÖüȲ»ÊÇƽºâλÖã¬ÓÖ²»ÊÇ×î´óλÒÆ´¦£¬ËùÒÔÔÚ3T/4ʱ¼äÄڵķ³Ì²»ÊÇ30cm£¬D´í¡£
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

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

Ò»Áмòгºá²¨ÔÚt=0ʱµÄ²¨ÐÎͼÈçͼËùʾ¡£½éÖÊÖÐx=3m´¦µÄÖʵãPÑØyÖá·½Ïò×ö¼òгÔ˶¯µÄ±í´ïʽΪcm¡£Ôò´Ë²¨ÑØxÖá      £¨Ñ¡Ìî¡°Õý¡±»ò¡°¸º¡±£©·½Ïò´«²¥£¬´«²¥ËÙ¶ÈΪ     m/s¡£

²é¿´´ð°¸ºÍ½âÎö>>

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

Ò»ÁкᲨÑØxÖáÕýÏò´«²¥,a?b?c?dΪ½éÖÊÖÐÑز¨´«²¥·½ÏòÉÏËĸöÖʵãµÄƽºâλÖÃ.ijʱ¿ÌµÄ²¨ÐÎÈçͼ¼×Ëùʾ,´Ëºó,Èô¾­¹ýÖÜÆÚ¿ªÊ¼¼Æʱ,ÔòͼÒÒÃèÊöµÄÊÇ(    )
A£®a´¦ÖʵãµÄÕñ¶¯Í¼ÏóB£®b´¦ÖʵãµÄÕñ¶¯Í¼Ïó
C£®c´¦ÖʵãµÄÕñ¶¯Í¼ÏóD£®d´¦ÖʵãµÄÕñ¶¯Í¼Ïó

²é¿´´ð°¸ºÍ½âÎö>>

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

(2011ÄêȪÖݼì²â)¾¢¶ÈϵÊýΪ20 N/cmµÄµ¯»ÉÕñ×Ó£¬ËüµÄÕñ¶¯Í¼ÏóÈçͼ11£­1£­13Ëùʾ£¬ÔÚͼÖÐAµã¶ÔÓ¦µÄʱ¿Ì(¡¡¡¡)

ͼ11£­1£­13
A£®Õñ×ÓËùÊܵĵ¯Á¦´óСΪ0.5 N£¬·½ÏòÖ¸ÏòxÖáµÄÕý·½Ïò
B£®Õñ×ÓµÄËٶȷ½ÏòÖ¸ÏòxÖáµÄÕý·½Ïò
C£®ÔÚ0¡«4 sÄÚÕñ×Ó×öÁË1.75´ÎÈ«Õñ¶¯
D£®ÔÚ0¡«4 sÄÚÕñ×Óͨ¹ýµÄ·³ÌΪ0.35 cm£¬Î»ÒÆΪ0

²é¿´´ð°¸ºÍ½âÎö>>

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

Ò»Áмòг²¨ÑØxÖáÕý·½Ïò´«²¥£¬Ä³Ê±¿Ì²¨ÐÎͼÈçͼ¼×Ëùʾ£¬a¡¢b¡¢c¡¢dÊDz¨´«²¥·½ÏòÉϵÄËĸöÕñ¶¯ÖʵãµÄƽºâλÖã®ÈçÔÙ¹ý¸öÖÜÆÚ£¬ÆäÖÐijÖʵã¼ÌÐøÕñ¶¯µÄͼÏóÈçͼÒÒËùʾ£¬Ôò¸ÃÖʵãÊÇ£¨  £©
A£®a´¦ÖʵãB£®b´¦ÖʵãC£®c´¦Öʵã D£®d´¦Öʵã

²é¿´´ð°¸ºÍ½âÎö>>

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

Ò»¼òгºá²¨ÔÚxÖáÉÏ´«²¥£¬Ä³Ê±¿ÌµÄ²¨ÐÎÈçͼËùʾ£¬ÒÑÖª´ËʱÖʵãFÑØyÖḺ·½ÏòÔ˶¯£¬Ôò£¨     £©
A£®´Ë²¨ÏòxÖḺ·½Ïò´«²¥
B£®ÖʵãD´ËʱÏòÏÂÔ˶¯
C£®ÖʵãEµÄÕñ·ùΪÁã
D£®ÖʵãB½«±ÈCÏȻص½Æ½ºâλÖÃ

²é¿´´ð°¸ºÍ½âÎö>>

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

ÈçͼËùʾÖÐʵÏßÊÇÒ»Áмòгºá²¨ÔÚʱ¿ÌµÄ²¨ÐΣ¬ÐéÏßÊÇÕâÁв¨ÔÚsʱ¿ÌµÄ²¨ÐΣ¬ÕâÁв¨µÄÖÜÆÚ·ûºÏ£º£¬ÊÔÎÊ£º

£¨1£©Èô²¨ÏòÓÒ´«²¥£¬²¨ËÙ¶à´ó£¿
£¨2£©Èô²¨Ïò×ó´«²¥£¬²¨ËÙºÍƵÂʸ÷¶à´ó£¿

²é¿´´ð°¸ºÍ½âÎö>>

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

Ò»Áмòгºá²¨Ä³Ê±¿Ì²¨ÐÎÈçͼËùʾ£¬´ËʱÖʵãPµÄËٶȷ½ÏòÑØÖḺ·½Ïò£¬Ôò
A£®ÕâÁв¨ÑØÖáÕý·½Ïò´«²¥
B£®Öʵã´Ëʱ¶¯ÄÜÕýÔÚÔö´ó£¬¼ÓËÙ¶ÈÒ²ÔÚÔö´ó
C£®ÔÙ¾­¹ýÒ»¸öÖÜÆÚʱ£¬ÖʵãÔ˶¯µ½´¦
D£®µ±ÖʵãPÔ˶¯µ½×îµÍµãʱ£¬ÖʵãÇ¡ºÃÔ˶¯µ½Æ½ºâλÖÃ

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸