ÈçͼËùʾ£¬Á½Áмòгºá²¨·Ö±ðÑØzÖáÕý·½ÏòºÍ¸º·½Ïò´«²¥£¬Á½²¨Ô´·Ö±ðλÓÚx="-0.2" mºÍx="l.2" m´¦£¬Á½Áв¨µÄËٶȾùΪv="0.4" m/s£¬Á½²¨Ô´µÄ
Õñ·ù¾ùΪA=2cm.ͼʾΪt=0ʱ¿ÌÁ½Áв¨µÄͼÏ󣨴«²¥·½ÏòÈçͼËùʾ£©£¬´Ë¿ÌƽºâλÖô¦ÓÚx="0.2" mºÍx="0.8" mµÄP¡¢QÁ½Öʵã¸Õ¿ªÊ¼Õñ¶¯£®ÖʵãMµÄƽºâλÖô¦ÓÚx="0.5" m´¦£¬¹ØÓÚ¸÷ÖʵãÔ˶¯Çé¿öÅжÏÕýÈ·µÄÊÇ£¨    £©£¨ÌîÕýÈ·´ð°¸±êºÅ£®Ñ¡¶Ô1¸öµÃ2·Ö£¬Ñ¡¶Ô2¸öµÃ4·Ö£¬Ñ¡¶Ô3¸öµÃ6·Ö£»Ã¿Ñ¡´í1¸ö¿Û3·Ö£¬×îµÍµÃ·ÖΪ0·Ö£©
A£®Á½Áв¨ÏàÓö¹ýºóÕñ·ùÈÔȻΪ2 cm
B£®t="l" sʱ¿Ì£¬ÖʵãMµÄλÒÆΪ-4 cm
C£®t="l" sʱ¿Ì£¬ÖʵãMµÄλÒÆΪ+4 cm
D£®t="0.75" sʱ¿Ì£¬ÖʵãP¡¢QÀÏʦ¶¼Ô˶¯µ½Mµã
E£®ÖʵãP¡¢QµÄÆðÕñ·½Ïò¶¼ÑØyÖḺ·½Ïò
ABE

ÊÔÌâ·ÖÎö£ºÁ½Áв¨ÏàÓö¹ýºó²»¸Ä±ä²¨µÄÐÔÖÊ£¬ËùÒÔÕñ·ù²»±ä£¬Õñ·ùÈÔȻΪ2cm£¬¹ÊAÕýÈ·£»ÓÉͼ֪²¨³¤£¬Óɵ㬲¨µÄÖÜÆÚΪ£¬Á½Öʵ㴫µ½MµÄʱ¼äΪ£¬µ±t=1sʱ¿Ì£¬Á½²¨µÄ²¨¹ÈÇ¡ºÃ´«µ½ÖʵãM£¬ËùÒÔλÒÆΪ-4cm£®¹ÊBÕýÈ·£¬C´íÎó£»Öʵ㲻Ë沨ǨÒÆ£¬Ö»ÔÚ¸÷×ÔµÄƽºâλÖø½½üÕñ¶¯£¬ËùÒÔÖʵãP¡¢Q¶¼²»»áÔ˶¯µ½Mµã£¬¹ÊC´íÎó£»Óɲ¨µÄ´«²¥·½Ïò¸ù¾Ý²¨ÐÎƽÒÆ·¨¿ÉÅжϳöÖʵãµÄÕñ¶¯·½Ïò£ºÁ½Áмòгºá²¨·Ö±ðÑØxÖáÕý·½ÏòºÍ¸º·½Ïò´«²¥£¬ÔòÖʵãP¡¢Q¾ùÑØyÖḺ·½ÏòÔ˶¯£¬¹ÊEÕýÈ·£»
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

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

Ò»ÁкᲨÔÚxÖáÏßÉÏ´«²¥×Å£¬ÔÚt1=0ºÍt2=0.04sʱµÄ²¨ÐÎÇúÏß·Ö±ðÈçͼËùʾ£º

¢Ù¶Á³ö¼òг²¨µÄ²¨³¤ÊÇ______m£»Õñ·ùÊÇ______m£®
¢ÚÉèÖÜÆÚ´óÓÚ£¨t2-t1£©£®Èç¹û²¨ÏòÓÒ´«²¥£¬²¨ËÙ¶à´ó£¿
¢ÛÈô²¨ËٵĴóСΪ2750m/s£¬Ç󲨵Ĵ«²¥·½Ïò£®

²é¿´´ð°¸ºÍ½âÎö>>

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

Èçͼ£¬Ò»ÁÐÏòÓÒ´«µÄ²¨£¬v=100m/s£¬µ±t=0ʱ£¬²¨ÕýºÃ´«µ½Aµã£®Aµãºá×ø±êΪ20m£¬Pµãºá×ø±êΪ200m£®Çó
£¨1£©PµãµÄÆðÕñ·½Ïò£»
£¨2£©ÖʵãP¿ªÊ¼ÆðÕñµÄʱ¿Ì£»
£¨3£©ÖʵãPµÚ¶þ´Î³öÏÖ²¨¹ÈµÄʱ¿Ì£®

²é¿´´ð°¸ºÍ½âÎö>>

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

ÈçͼËùʾ£¬ÑØxÖáÕý·½Ïò´«²¥µÄÒ»Áмòгºá²¨ÔÚijʱ¿ÌµÄ²¨ÐÎͼΪһÕýÏÒÇúÏߣ¬Æ䲨ËÙΪ200m/s£¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ( ¡¡¡¡)
A£®Í¼Ê¾Ê±¿ÌÖʵãbµÄ¼ÓËÙ¶ÈÕýÔÚÔö´ó
B£®´Óͼʾʱ¿Ì¿ªÊ¼£¬¾­¹ý0.01s£¬Öʵãbͨ¹ýµÄ·³ÌΪ2m
C£®Èô´Ë²¨Óöµ½ÁíÒ»Áмòгºá²¨²¢·¢ÉúÎȶ¨¸ÉÉæÏÖÏó£¬Ôò¸Ã²¨ËùÓöµ½µÄ²¨µÄƵÂÊΪ50Hz
D£®Èô¸Ã²¨·¢ÉúÃ÷ÏÔµÄÑÜÉäÏÖÏó£¬Ôò¸Ã²¨ËùÓöµ½µÄÕÏ°­Îï»ò¿×µÄ³ß´çÒ»¶¨±È4m´óµÃ¶à

²é¿´´ð°¸ºÍ½âÎö>>

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

Ò»ÁÐÑØxÖáÕý·½Ïò´«²¥µÄ¼òг»úеºá²¨£¬²¨ËÙΪ4 m/s.ijʱ¿Ì²¨ÐÎÈçͼËùʾ£¬ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ£¨ ¡¡¡¡£©
A£®ÕâÁв¨µÄÕñ·ùΪ4 cm
B£®ÕâÁв¨µÄÖÜÆÚΪ1 s
C£®´Ëʱx£½4 m´¦ÖʵãÑØyÖáÕý·½ÏòÔ˶¯
D£®´Ëʱx£½4 m´¦ÖʵãµÄ¼ÓËÙ¶ÈΪ0

²é¿´´ð°¸ºÍ½âÎö>>

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

Ò»¼òг²¨ÔÚÈçͼËùʾµÄxÖáÉÏ´«²¥£¬ÊµÏߺÍÐéÏß·Ö±ðÊÇt1=0ºÍt2 =0.2sʱ¿ÌµÄ²¨ÐÎͼ£®Ôò
A£®Èô¸Ã²¨ÔÚt1=0ʱ¿ÌÒÑÑØ+x·½ÏòÇ¡´«²¥µ½x=6m´¦£¬Ôò²¨Ô´ÆðÕñ·½ÏòÏòÏÂ
B£®Èô¸Ã²¨ÓëÁíһƵÂÊΪ1.25HzµÄ¼òг²¨ÏàÓöʱ·¢Éú¸ÉÉ棬Ôò¸Ã²¨ÑØ-x·½Ïò´«²¥
C£®Èô¸Ã²¨ÔÚt1=0.2sʱ¿Ì£¬x=2.5m´¦µÄÖʵãÏò£­y·½ÏòÔ˶¯£¬Ôò¸Ã²¨Ïò+x·½Ïò´«²¥
D£®Èô¸Ã²¨µÄ´«²¥ËÙ¶ÈÊÇ75m/s£¬Ôò¸Ã²¨ÑØ£­x·½Ïò´«²¥

²é¿´´ð°¸ºÍ½âÎö>>

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

Ò»Áмòгºá²¨ÑØÖ±ÏßÓÉaÏòb´«²¥£¬Ïà¾à21mµÄa¡¢bÁ½´¦µÄÖʵãÕñ¶¯Í¼ÏóÈçͼÖÐa¡¢bËùʾ£¬Ôò
A£®¸Ã²¨µÄÕñ·ùÊÇ20cm
B£®¸Ã²¨µÄ²¨³¤¿ÉÄÜÊÇ12m
C£®¸Ã²¨µÄ²¨ËÙ¿ÉÄÜÊÇ10 m/s
D£®¸Ã²¨ÓÉa´«²¥µ½b×î¶ÌÀúʱ3.5s

²é¿´´ð°¸ºÍ½âÎö>>

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

Ò»ÁÐÑØxÖá´«²¥µÄ¼òгºá²¨ÔÚijʱ¿Ì²¨µÄͼÏóÈçͼËùʾ£¬ÒÑÖª²¨ËÙΪ20 m/s£¬Í¼Ê¾Ê±¿Ì
x£½2.0m´¦µÄÖʵãÕñ¶¯Ëٶȷ½ÏòÑØyÖḺ·½Ïò£¬¿ÉÒÔÅжÏ
A£®ÖʵãÕñ¶¯µÄÖÜÆÚΪ0.20s
B£®ÖʵãÕñ¶¯µÄÕñ·ùΪ1.6cm
C£®²¨ÑØxÖáµÄÕý·½Ïò´«²¥
D£®Í¼Ê¾Ê±¿Ì£¬x£½1.5m´¦µÄÖʵã¼ÓËÙ¶ÈÑØyÖáÕý·½Ïò

²é¿´´ð°¸ºÍ½âÎö>>

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

£¨6·Ö£©²¨ËÙ¾ùΪv=2m/sµÄ¼×¡¢ÒÒÁ½Áмòгºá²¨¶¼ÑØxÖáÕý·½Ïò´«²¥£¬Ä³Ê±¿Ì²¨µÄͼÏó·Ö±ðÈçͼËùʾ£¬ÆäÖÐP¡¢Q´¦µÄÖʵã¾ù´¦ÓÚ²¨·å¡£¹ØÓÚÕâÁ½Áв¨£¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨  £©
A£®¼×²¨ÖеÄP´¦Öʵã±ÈM´¦ÖʵãÏÈ»ØƽºâλÖÃ
B£®´ÓͼʾµÄʱ¿Ì¿ªÊ¼£¬¾­¹ý1.0s£¬PÖʵãͨ¹ýµÄλÒÆΪ2m
C£®´ÓͼʾµÄʱ¿Ì¿ªÊ¼£¬P´¦Öʵã±ÈQ´¦ÖʵãÏÈ»ØƽºâλÖÃ
D£®´Ëʱ¿Ì£¬MµãµÄÔ˶¯·½ÏòÑØ£øÖáÕý·½Ïò
E£®Èç¹ûÕâÁ½Áв¨ÏàÓö²»¿ÉÄܲúÉúÎȶ¨µÄ¸ÉÉæͼÑù

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸