8£®Á½±¾ÍêÈ«ÏàͬµÄÊéAºÍB£¬ÖؾùΪ10N£¬Ã¿ÕÅÖ½¼äµÄ¶¯Ä¦²ÁÒòÊý¾ùΪ0.2£¬Ã¿±¾Êé¾ùÓÐ200Ò³£®×ÀÃæ¹â»¬£®
¢ÙÈçͼA·ÅÔÚBµÄÉÏÃ棬ÓÃÁ¦°ÑBÏòÓÒ»ºÂý³é³ö£¬ÇóB¶ÔAµÄÖ§³ÖÁ¦ÊǶàÉÙ£¿µ¯»ÉµÄµ¯Á¦ÊǶàÉÙ£¿
¢ÚÈôABÁ½Êé¸÷ÓÐÒ»°ë½»²æµþ·ÅÔÚÒ»Æ𣬰ÑBÀ­³öʱ£¬BÊéÉϰ벿·ÖµÄÉÏϱíÃæÊܵ½µÄµ¯Á¦·Ö±ðÊǶàÉÙ£¿µ¯»ÉµÄµ¯Á¦ÓÖÊǶàÉÙ£¿
¢ÛÈôÁ½ÊéµÄÿһҳ¶¼½»´íµþ·Å£¬BÊéµÄµÚ5¡¢µÚ6Ò³£¨¼´µÚÈýÕÅÖ½ÉÏϱíÃ棩Êܵ½µÄµ¯Á¦¸÷ÊǶàÉÙ£¿°ÑBÀ­³öʱµ¯»ÉµÄµ¯Á¦ÊǶàÉÙ£¿

·ÖÎö £¨1£©¶ÔA½øÐÐÊÜÁ¦·ÖÎö£¬ÊúÖ±·½ÏòºÍˮƽ·½ÏòÓÉƽºâÌõ¼þ£¬½áºÏºú¿Ë¶¨Âɼ´¿ÉÇó½âB¶ÔAµÄÖ§³ÖÁ¦ºÍµ¯»ÉµÄµ¯Á¦
£¨2£©Çó³öBÊéÉÏϱíÃæµÄѹÁ¦£¬Çó³öBÊéËùÊܵ½µÄ×ÜĦ²ÁÁ¦¼´µ¯»ÉµÄµ¯Á¦£»
£¨3£©¸ù¾ÝÓ°ÏìĦ²ÁÁ¦´óСµÄÒòÊýд³öĦ²ÁÁ¦µÄ´óСÓëѹÁ¦µÄ¹Øϵʽ£¬Çó³öĦ²ÁÁ¦µÄ´óС£¬µ±À­Á¦µÈÓÚĦ²ÁÁ¦Ê±²Å¿ÉÒÔ°ÑËûÃÇÀ­¿ª£®

½â´ð ½â£º¢ÙÒÔAΪÑо¿¶ÔÏ󣬶ÔAÊÜÁ¦·ÖÎö£¬¶ÔAÊÜÁ¦·ÖÎö£¬B¶ÔAµÄÖ§³ÖÁ¦µÈÓÚAµÄÖØÁ¦10N
µ¯»ÉµÄµ¯Á¦µÈÓÚB¶ÔAµÄĦ²ÁÁ¦Îª£º${F}_{1µ¯}^{\;}=f=¦Ì{F}_{N}^{\;}=0.2¡Á10=2N$
¢ÚBÊéÉϰ벿·ÖµÄÉϱíÃæÊܵ½µÄµ¯Á¦Îª£º${F}_{N1}^{\;}=\frac{{G}_{A}^{\;}}{2}=\frac{10}{2}=5N$
BÊéÉϰ벿·ÖµÄϱíÃæÊܵ½µÄµ¯Á¦Îª£º${F}_{N2}^{\;}=\frac{{G}_{A}^{\;}+{G}_{B}^{\;}}{2}=10N$
B¶ÔAµÄÖ§³ÖÁ¦ÊÇ10N µ¯»ÉµÄµ¯Á¦ÊÇ2N£»
µ¯»ÉµÄµ¯Á¦Îª£º${F}_{µ¯}^{\;}=¦Ì\frac{{G}_{A}^{\;}}{2}+¦Ì\frac{{G}_{A}^{\;}+{G}_{B}^{\;}}{2}$$+¦Ì£¨{G}_{A}^{\;}+\frac{{G}_{B}^{\;}}{2}£©$=6N
¢ÛÿÕÅÖ½µÄÖØÁ¦Îª£º${G}_{0}^{\;}=\frac{10}{100}=0.1N$
BÊéµÄµÚ5Ò³Êܵ½µÄµ¯Á¦Îª£º$5{G}_{0}^{\;}=0.5N$
µÚ6Ò³£¨¼´µÚÈýÕÅÖ½ÉÏϱíÃ棩Êܵ½µÄµ¯Á¦Îª£º$6{G}_{0}^{\;}=0.6N$
ÓÉÌ⣬Á½±¾Êé×ܹ²400ÕÅ£®
´ÓÉϵ½Ï£º
µÚÒ»Õź͵ڶþÕż们¶¯Ä¦²ÁÁ¦Îª 1¡Á0.1¡Á0.2N
µÚ¶þÕź͵ÚÈýÕż们¶¯Ä¦²ÁÁ¦Îª 2¡Á0.1¡Á0.2N
   ¡­
µÚ399Õź͵Ú400Õż䶯Ħ²ÁÁ¦Îª 399¡Á0.1¡Á0.2N
×ÜĦ²ÁÁ¦f=£¨1+2+¡­+399£©¡Á0.1¡Á0.2N=1596N
ËùÒÔ°ÑBÀ­³öʱµ¯»ÉµÄµ¯Á¦Îª1596N
´ð£º¢ÙÈçͼA·ÅÔÚBµÄÉÏÃ棬ÓÃÁ¦°ÑBÏòÓÒ»ºÂý³é³ö£¬ÇóB¶ÔAµÄÖ§³ÖÁ¦ÊÇ10N£¬µ¯»ÉµÄµ¯Á¦ÊÇ2N
¢ÚÈôABÁ½Êé¸÷ÓÐÒ»°ë½»²æµþ·ÅÔÚÒ»Æ𣬰ÑBÀ­³öʱ£¬BÊéÉϰ벿·ÖµÄÉÏϱíÃæÊܵ½µÄµ¯Á¦·Ö±ðÊÇ5N¡¢10N£¬µ¯»ÉµÄµ¯Á¦ÓÖÊÇ6N
¢ÛÈôÁ½ÊéµÄÿһҳ¶¼½»´íµþ·Å£¬BÊéµÄµÚ5¡¢µÚ6Ò³£¨¼´µÚÈýÕÅÖ½ÉÏϱíÃ棩Êܵ½µÄµ¯Á¦¸÷ÊÇ0.5N¡¢0.6N£¬°ÑBÀ­³öʱµ¯»ÉµÄµ¯Á¦ÊÇ1596N

µãÆÀ ±¾Ì⿼²éÁËÓ°ÏìĦ²ÁÁ¦´óСµÄÒòËØ£¬¹Ø¼üÊǸù¾Ýˮƽ·½ÏòÎïÌåµÄѹÁ¦ºÍ×ÔÉíµÄѹÁ¦ÏàµÈµÃ³öĦ²ÁÁ¦ºÍѹÁ¦µÄ¹Øϵ½øÐÐÇó½â£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ

18£®ÔÑÊýn=100µÄÔ²ÐνðÊôÏßȦµÄµç×èR=2¦¸£¬ÏßȦÓëR1=2¦¸µÄµç×èÁ¬½á³É±ÕºÏ»Ø·£¬Æä¼ò»¯µç·Èçͼ1Ëùʾ£¬A£®BΪÏßȦÁ½¶Ëµã£®ÏßȦµÄ°ë¾¶r1=15cm£¬ÔÚÏßȦÖа뾶r2=10cmµÄÔ²ÐÎÇøÓò´æÔÚ´¹Ö±ÓÚÏßȦƽÃæÏòÀïµÄÔÈÇ¿´Å³¡£¬´Å¸ÐӦǿ¶ÈBËæʱ¼ät±ä»¯µÄ¹ØϵÈçͼ2Ëùʾ£®ÔòÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£®R1Á½¶ËµçѹΪ¦ÐVB£®AµãµçÊƱÈBµãµçÊƸß
C£®ÏßȦÖвúÉúµÄ¸ÐÓ¦µç¶¯ÊÆΪ4.5¦ÐVD£®0¡«2sÄÚÁ÷¹ýR1µÄµçÁ¿Îª1.125¦ÐC

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ

19£®²¨ÔÚ½éÖÊÖд«²¥Ê±£¬Ëæ×Å´«²¥¾àÀëµÄÔö¼Ó£¬ÆäÄÜÁ¿ÍùÍùÖð½¥¼õÈõ£®Í¼¼×ÊÇijʱ¿ÌÒ»ÁÐÖ±Ïß´«²¥µÄ»úе²¨´«²¥Â·¾¶ÉÏA¡¢BÁ½µã¸½½üµÄÁ½¸öÍêÕû²¨ÐΣ¨Á½¸ö²¨ÐÎÖ®¼äµÄ¾àÀëÔÚºáÖáÉÏ×÷ѹËõ´¦Àí£©£®Aµã×ø±êx=0£¬Bµã×ø±êx=22m£¬Cµã×ø±ê x=2m£¬D×ø±êxδ֪£®A¡¢BÁ½µãÕñ·ù²»Í¬£¬C¡¢DÊÇÍêÕû²¨Ðζ˵㣬Á½¸öÍêÕû²¨Ðΰ´Ïàͬ±ÈÀý»­³ö£®Í¼ÒÒÊÇBµãµÄÕñ¶¯Í¼Ïó£®ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£®ÕâÁв¨ÓÉAÏòB´«²¥BB£®Dµã×ø±êx£¼24m
C£®Í¼¼×¿ÉÄÜÊÇt=2sʱ¿ÌµÄ²¨¶¯Í¼ÏóD£®Í¼¼×¿ÉÄÜÊÇt=0sʱ¿ÌµÄ²¨¶¯Í¼Ïó
E£®ÕâÁв¨¾­BµãʱµÄ´«²¥ËÙ¶ÈΪ1m/s   

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ

16£®ÈçͼËùʾ£¬ÓÃϸÏßAO¡¢BOÐü¹ÒÖØÎBOˮƽ£¬AOÓëÊúÖ±Ïß³É30¡ã½Ç£¬ÈôAO¡¢BOÄܳÐÊܵÄ×î´óÀ­Á¦¸÷Ϊ10NºÍ6N£¬ÈôOCÄܳÐÊÜ×ã¹»´óµÄÀ­Á¦£¬ÎªÊ¹Ï¸Ïß²»±»À­¶Ï£¬ÖØÎïÔÊÐíµÄ×î´óÖØÁ¦Îª¶àÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ

3£®ÈçͼËùʾ£¬LCÕñµ´»Ø·ÖÐÕñµ´µçÁ÷µÄÖÜÆÚΪ2¡Á10-2s£¬×ÔÕñµ´µçÁ÷ÑØÄæʱÕë·½Ïò´ïµ½×î´óÖµ¿ªÊ¼¼Æʱt=3.14¡Á10-2sʱ£¬µçÈÝÆ÷Õý´¦ÓÚ״̬³äµç£¨Ìî³äµç¡¢·Åµç¡¢³äµçÍê±Ï»ò·ÅµçÍê±Ï£©£®ÕâʱµçÈÝÆ÷µÄϼ«°å´ø¸ºµç£¨Ìî´øÕýµç¡¢´ø¸ºµç»ò²»´øµç£©£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

13£®ÏÂÁйØÓÚµç´Å²¨ºÍÏà¶ÔÂÛ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£®Âó¿Ë˹ΤÌá³öÁ˵ç´Å²¨ÀíÂÛ£¬²¢ÓÃʵÑé֤ʵÁ˵ç´Å²¨µÄ´æÔÚ
B£®±ä»¯µÄµç³¡Ò»¶¨²úÉú±ä»¯µÄ´Å³¡£¬±ä»¯µÄ´Å³¡Ò»¶¨²úÉú±ä»¯µÄµç³¡
C£®¹âËÙ²»±äÔ­ÀíÊÇ£ºÕæ¿ÕÖеĹâËÙÔÚ²»Í¬µÄ¹ßÐԲο¼ÏµÖж¼ÊÇÏàͬµÄ
D£®¡÷E=¡÷mc2±íÃ÷ÔÚÒ»¶¨Ìõ¼þϼõÉÙµÄÖÊÁ¿¡÷m¿ÉÒÔת»¯ÎªÄÜÁ¿¡÷EÊͷųöÀ´

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ

20£®Èçͼ¼×Ëùʾ£¬Ë®Æ½´«ËÍ´øÒÔ5.0m/sºã¶¨µÄËÙÂÊÔËת£¬Á½Æ¤´øÂÖÖ®¼äµÄ¾àÀël=6m£¬Æ¤´øÂֵİ뾶´óС¿ÉºöÂÔ²»¼Æ£®ÑØˮƽ´«ËÍ´øµÄÉϱíÃ潨Á¢xOy×ø±êϵ£¬×ø±êÔ­µãOÔÚ´«ËÍ´øµÄ×î×ó¶Ë£®°ë¾¶ÎªRµÄ¹â»¬Ô²¹ìµÀABCµÄ×îµÍµãAµãÓëCµãÔ­À´ÏàÁ¬£¬Î»ÓÚÊúֱƽÃæÄÚ£¨ÈçͼÒÒËùʾ£©£¬ÏÖ°ÑËü´Ó×îµÍµã´¦Çпª£¬²¢Ê¹C¶ËÑØyÖḺ·½Ïò´í¿ªÉÙÐí£¬°ÑËüÖÃÓÚˮƽ´«ËÍ´øµÄ×îÓҶˣ¬AµãλÓÚxÖáÉÏÇÒÓë´«ËÍ´øµÄ×îÓÒ¶ËÖ®¼äµÄ¾àÀë¿ÉºöÂÔ²»¼Æ£¬¹ìµÀµÄA¡¢CÁ½¶Ë¾ùλÓÚ×îµÍµã£¬C¶ËÓëһˮƽֱ¹ìµÀƽ»¬Á¬½Ó£®ÓÉÓÚA¡¢CÁ½µã¼äÑØyÖá·½Ïò´í¿ªµÄ¾àÀëºÜС£¬¿É°ÑABCÈÔ¿´×÷λÓÚÊúֱƽÃæÄÚµÄÔ²¹ìµÀ£®½«Ò»ÖÊÁ¿m=1kgµÄСÎï¿éP£¨¿ÉÊÓΪÖʵ㣩ÑØxÖáÇá·ÅÔÚ´«ËÍ´øÉÏij´¦£¬Ð¡Îï¿éËæ´«ËÍ´øÔ˶¯µ½Aµã½øÈë¹â»¬Ô²¹ìµÀ£¬Ç¡ºÃÄܹ»Í¨¹ýÔ²¹ìµÀµÄ×î¸ßµãB£¬²¢ÑØÊúÖ±Ô²¹ìµÀABC×öÍêÕûµÄÔ²ÖÜÔ˶¯ºóÓÉCµã¾­Ë®Æ½Ö±¹ìµÀ»¬³ö£®ÒÑ֪СÎï¿éÓë´«ËÍ´ø¼äµÄ¶¯Ä¦²ÁÒòÊý¦Ì=0.5£¬Ô²¹ìµÀµÄ°ë¾¶R=0.5m£¬È¡ÖØÁ¦¼ÓËÙ¶Èg=10m/s2£®Çó£º
£¨1£©Îï¿éͨ¹ýÔ²¹ìµÀ×îµÍµãAʱ¶Ô¹ìµÀѹÁ¦µÄ´óС£»
£¨2£©Çá·ÅСÎï¿éλÖõÄx×ø±êÓ¦Âú×ãʲôÌõ¼þ£¬²ÅÄÜÍê³ÉÉÏÊöÔ˶¯£»
£¨3£©´«ËÍ´øÓɵ綯»ú´ø¶¯£¬ÆäÓëÂÖ×Ó¼äÎÞÏà¶Ô»¬¶¯£¬²»¼ÆÂÖÖá´¦µÄĦ²Á£®Èô½«Ð¡Îï¿éÇá·ÅÔÚ´«ËÍ´øÉÏOµã£¬Çó½«Ð¡Îï¿é´ÓOµãÔËËÍÖÁAµã¹ý³ÌÖе綯»ú¶à×öµÄ¹¦£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ

17£®¸ù¾Ý´òµã¼ÆʱÆ÷´ò³öµÄÖ½´ø£¬ÎÒÃÇ¿ÉÒÔ²»ÀûÓù«Ê½¼ÆËã¾ÍÄÜÖ±½ÓµÃµ½»òÖ±½Ó²âÁ¿µÃµ½µÄÎïÀíÁ¿ÊÇ£¨¡¡¡¡£©
A£®Ê±¼ä¼ä¸ôB£®Î»ÒÆC£®ËÙ¶ÈD£®Æ½¾ùËÙ¶È

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÊµÑéÌâ

18£®Ä³Í¬Ñ§ÀûÓÃÈçͼËùʾµÄ×°ÖÃ̽¾¿Á¦µÄƽÐÐËıßÐζ¨Ôò£ºÊúÖ±·ÅÖÃÆÌÓа×Ö½µÄľ°åÉϹ̶¨ÓÐÁ½¸öÇáÖÊС»¬ÂÖ£¬Ï¸ÏßABºÍOCÁ¬½ÓÓÚ£®µã£¬Ï¸ÏßABÈƹýÁ½»¬ÂÖ£¬D¡¢EÊÇϸÏßÓ뻬ÂÖµÄÁ½¸ö½Ó´¥µã£®ÔÚϸÏßÄ©¶ËA¡¢B¡¢CÈý´¦·Ö±ð¹ÒÓв»Í¬ÊýÁ¿µÄÏàͬ¹³Â룬ÉèËù¹Ò¹³ÂëÊý·Ö±ðÓÃNl¡¢N2¡¢N3±íʾ£®¹ÒÉÏÊʵ±ÊýÁ¿µÄ¹³Â룬µ±ÏµÍ³Æ½ºâʱ½øÐÐÏà¹Ø¼Ç¼£®¸Ä±äËù¹Ò¹³ÂëµÄÊýÁ¿£¬Öظ´½øÐжà´ÎʵÑ飮

£¨1£©ÏÂÁÐÄÜÂú×ãϵͳƽºâµÄNl¡¢N2¡¢N3µÄÈ¡Öµ¿ÉÄÜΪ£ºAC
£¨A£©N1=N2=3£¬N3=4                               £¨B£©N1=N2=3£¬N3=6
£¨C£© N1=N2=N3=3                                   £¨D£©N1=3£¬N2=4£¬N3=8
£¨2£©ÏÂÁйØÓÚ±¾ÊµÑé²Ù×÷µÄÃèÊö£¬ÕýÈ·µÄÓУºBC
£¨A£©ÐèÒªÀûÓÃÌìƽ²â³ö¹³ÂëµÄÖÊÁ¿
£¨B£©¡ÏEOD²»Ò˹ý´ó
£¨C£©Á½»¬ÂÖµÄÖáÐIJ»±Ø´¦ÓÚͬһÌõˮƽÏßÉÏ
£¨D£©Ã¿´ÎʵÑ鶼ӦʹϸÏߵĽáµãD´¦ÓÚͬһλÖÃ
£¨3£©Ã¿´ÎʵÑé½áÊøºó£¬ÐèÒª¼Ç¼µÄÏîÄ¿ÓÐNl¡¢N2¡¢N3µÄÊýÖµºÍOC¡¢ODºÍOEÈý¶ÎϸÏߵķ½Ïò£º
£¨4£©¸ÃͬѧÀûÓÃij´ÎʵÑé½á¹ûÔÚ°×Ö½ÉÏ»æÖÆÁËÈçͼËùʾµÄʵÑé½á¹û´¦Àíͼ£¬Ôò¸ù¾ÝÄã¶Ô±¾ÊµÑéµÄÀí½â£¬À­Á¦FODºÍFOEµÄºÏÁ¦µÄ²âÁ¿ÖµÓ¦ÊÇͼÖеÄF£¨Ñ¡Ìî¡°F¡±»ò¡°F¡ä¡±£©£®

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸