ÌâÄ¿ÄÚÈÝ
1£®ÈçͼËùʾ£¬Ð¡³µ¡¢´òµã¼ÆʱÆ÷µÈÆ÷²ÄÖÃÓڸ߶ȿɵ÷½ÚµÄ³¤Ä¾°åÉÏ£®£¨1£©ÔÚÑé֤ţ¶ÙµÚ¶þ¶¨ÂɵÄʵÑéÖУ¬³ý´òµã¼ÆʱÆ÷£¨¸½Ö½´ø£¬¸´Ð´Ö½£©¡¢Ð¡³µ£¨ÆäÉÏ¿É·ÅÖÃíÀÂ룩¡¢Ï¸Ïß¡¢¹³Â루ÖÊÁ¿ÒÑÖª£©¡¢¸½»¬Âֵij¤Ä¾°å¡¢µ¼ÏßÍ⣬ÔÚÏÂÃæµÄÒÇÆ÷ºÍÆ÷²ÄÖУ¬±ØÐëʹÓõÄÓТ٢ۢݣ®£¨ÌîдÐòºÅ£©
¢ÙµçѹºÏÊʵÄ50Hz½»Á÷µçÔ´ ¢Úµçѹ¿Éµ÷½ÚµÄÖ±Á÷µçÔ´ ¢Û¿Ì¶È³ß ¢ÜÃë±í ¢ÝÌìƽ
ʵÑéͨ¹ý¸Ä±ä¹³Âë¸öÊý£¬¿ÉÑéÖ¤ÖÊÁ¿Ò»¶¨Ê±£¬¼ÓËÙ¶ÈÓëÁ¦³ÉÕý±ÈµÄ¹Øϵ£¬Í¨¹ýÔÚС³µÉÏÌí¼Ó¹³ÂëµÄ¸öÊý£¬¿ÉÑéÖ¤Á¦Ò»¶¨Ê±¼ÓËÙ¶ÈÓëÖÊÁ¿³É·´±ÈµÄ¹Øϵ
£¨2£©ÔÚÑé֤ţ¶ÙµÚ¶þ¶¨ÂɵÄʵÑéÖУ¬ÈôƽºâĦ²ÁÁ¦Ê±£¬³¤Ä¾°åµÄÒ»¶Ëµ÷½Ú¹ý¸ß£¬Ê¹µÃÆ«½ÇÆ«´ó£¬ÔòËùµÃµ½µÄa-F¹ØϵͼÏóΪͼ2ÖеÄC£®£¨aÊÇС³µµÄ¼ÓËٶȣ¬FÊÇϸÏß×÷ÓÃÓëС³µµÄÀÁ¦£©
£¨3£©ÊµÑéÖеõ½Èçͼ3µÄÒ»ÌõÖ½´ø£¬ÔÚÖ½´øÉϱãÓÚ²âÁ¿µÄµØ·½Ñ¡È¡µÚ1¸ö¼ÆÊýµã£¬ÆäϱíÃæA£¬µÚ6¸ö¼ÆÊýµãϱêÃ÷B£¬µÚ11¸ö¼ÆÊýµãϱêÃ÷C£¬µÚ16¸ö¼ÆÊýµãϱêÃ÷D£¬µÚ21¸ö¼ÆÊýµãϱíÃæE£®Èô²âµÃAC³¤Îª14.56cm£¬CD³¤11.15cm£¬DE³¤Îª13.73cm£¬ÔòС³µÔ˶¯µÄ¼ÓËٶȴóСΪ2.58m/s2£¬´òCµãʱС³µµÄ˲ʱËٶȴóСΪ0.986m/s£®£¨½á¹û±£ÁôÈýλÓÐЧÊý×Ö£©
·ÖÎö £¨1£©¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂɵÄʵÑéÔÀí¿É֪ʵÑéÖÐÐèÒªµÄÆ÷²Ä£»
£¨2£©»á·ÖÎö¼ÓËÙ¶Èʱ¼äͼÏ󣬲¢Äܸù¾ÝͼÏóÅж¨ÊµÑéÖгöÏÖµÄÎó²îÔÒò£»
£¨3£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯ÖÐʱ¼äÖеãµÄËٶȵÈÓڸùý³ÌÖеÄƽ¾ùËٶȣ¬¿ÉÒÔÇó³ö´òÖ½´øÉÏCµãʱС³µµÄ˲ʱËٶȴóС£»¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯µÄÍÆÂÛ¹«Ê½¡÷x=aT2¿ÉÒÔÇó³ö¼ÓËٶȵĴóС£®
½â´ð ½â£º£¨1£©ÊµÑéÖÐͨ¹ý´òµã¼ÆʱÆ÷ÕÒ³öÎïÌåÔ˶¯µÄλÒƺÍʱ¼ä£¬Í¨¹ý¶ÔÖ½´øµÄ´¦ÀíµÃ³ö¼ÓËٶȣ»
¹ÊʵÑéÖÐÐèÒªÓÃС³µ¡¢´òµã¼ÆʱÆ÷¡¢Ö½´ø¡¢íÀÂ롢СͰ¡¢Éþ×Ó¡¢µ¼Ïߣ»ÓÃÌìƽ²âÁ¿ÎïÌåµÄÖÊÁ¿£¬¿Ì¶È³ß²âÁ¿³¤¶È£»
µçÔ´Ó¦²ÉÓÃ50Hz½»Á÷µçÁ÷£¬´òµã¼ÆʱÆ÷±¾Éí¿ÉÒԼǼʱ¼ä£¬ËùÒÔ²»ÐèÒªÃë±í£¬¹ÊÐèÒª¢Ù¢Û¢Ý£»
¸ÃʵÑé²ÉÓÿØÖƱäÁ¿·¨½øÐÐʵÑ飬ʵÑéʱͨ¹ý¸Ä±ä ¹³ÂëµÄ¸öÊý£¬¿ÉÑéÖ¤ÖÊÁ¿Ò»¶¨Ê±£¬¼ÓËÙ¶ÈÓëÁ¦³ÉÕý±ÈµÄ¹Øϵ£»Í¨¹ý ÔÚС³µÉÏÌí¼Ó¹³ÂëµÄ¸öÊý£¬¿ÉÑéÖ¤Á¦Ò»¶¨Ê±£¬¼ÓËÙ¶ÈÓëÖÊÁ¿³É·´±ÈµÄ¹Øϵ£®
£¨2£©ÈôƽºâĦ²ÁÁ¦Ê±£¬³¤Ä¾°åµÄÒ»¶Ëµ÷½Ú¹ý¸ß£¬Ê¹µÃÇã½ÇÆ«´ó£¬Ð¡³µµÄÖØÁ¦ÑØбÃæÏòϵķÖÁ¦´óÓÚĦ²ÁÁ¦£¬ÔòÔÚ¼Ó¹³ÂëÇ°£¬Ð¡³µÄÜÓмÓËٶȣ¬ËùÒÔÔòËùµÃµ½Í¼Ïó×Ý×ø±êµÄ½Ø¾à²»Îª0£¬Ôòͼ2µÄa-F¹ØϵͼÏóΪC£®
£¨3£©ÎïÌå×öÔȱäËÙ¶ÈÖ±ÏßÔ˶¯£¬¸ù¾ÝÔ˶¯¹æÂÉÓУ¬Æ½¾ùËٶȵÈÓÚÖмäʱ¿ÌµÄ˲ʱËٶȣ®ËùÒÔCµãµÄËٶȵÈÓÚAE¾àÀëµÄƽ¾ùËٶȣ®ËùÒÔÓУº
vc=$\frac{AC+CD+DE}{4T}=\frac{0.1456+0.1115+0.1373}{4¡Á0.1}$m/s=0.986m/s£»
ÔÚ¼ÆËã¼ÓËÙ¶Èʱ£¬ÎªµÃµ½µÄʵÑéÊý¾Ý¸ü׼ȷ£¬Ó¦¸Ã²ÉÓÃÖð²î·¨£º
a1=$\frac{{x}_{CD}-{x}_{AB}}{2{T}^{2}}$£¬
a2=$\frac{{x}_{DE}-{x}_{BC}}{2{T}^{2}}$£¬
ÓÉÖð²î·¨¿ÉµÃ¼ÓËÙ¶ÈΪ£º
a=$\frac{BD-AC}{2{T}^{2}}$=$\frac{0.1972-0.1456}{2¡Á0£®{1}^{2}}$ m/s2=2.58m/s2
¹Ê´ð°¸Îª£º£¨1£©¢Ù¢Û¢Ý£¬¹³Âë¸öÊý£¬ÔÚС³µÉÏÌí¼Ó¹³ÂëµÄ¸öÊý£»£¨2£©C£»£¨3£©2.58£¬0.986
µãÆÀ ¶ÔÓÚʵÑéÌâҪעÒâʵÄѵÄÔÀíµÄ°ÑÎÕ£¬¸ù¾ÝÔÀí¼´¿É·ÖÎöʵÑéµÄ¹ý³Ì¡¢ÒÇÆ÷¶øÊý¾Ý·ÖÎö£»ÒªÌá¸ßÓ¦ÓÃÔȱäËÙÖ±ÏߵĹæÂÉÒÔ¼°ÍÆÂÛ½â´ðʵÑéÎÊÌâµÄÄÜÁ¦£¬ÔÚƽʱÁ·Ï°ÖÐÒª¼ÓÇ¿»ù´¡ÖªÊ¶µÄÀí½âÓëÓ¦Óã®Ö½´øÎÊÌâÒ»¶¨ÒªÕÆÎÕºÃƽ¾ùËٶȱíʾÖмäʱ¿ÌµÄ˲ʱËٶȣ¬ºÍÖð²î·¨µÄÓ¦Óã®
A£® | ÓÐFʱ£¬BÎï¿éÊܵ½·½ÏòÏòÓÒµÄĦ²ÁÁ¦£¬ÎÞFʱ£¬BÎï¿éÊܵ½·½ÏòÏò×óµÄĦ²ÁÁ¦ | |
B£® | ÓÐFʱ£¬BÎï¿éÊܵ½·½ÏòÏò×óµÄĦ²ÁÁ¦£¬ÎÞFʱ£¬BÎï¿é²»Êܵ½Ä¦²ÁÁ¦µÄ×÷Óà | |
C£® | ÓÐFʱ£¬BÎï¿éÊܵ½µÄĦ²ÁÁ¦´óСΪ$\frac{mF-¦Ìm£¨M+m£©g}{M+m}$ | |
D£® | ÎÞFʱ£¬BÎï¿éµÄ¼ÓËÙ¶ÈÖð½¥±äС |
A£® | ΪÁ˼ÆË㶯ÄܺÍÊÆÄÜ£¬ÒªÓÃÌìƽ²âÁ¿ÎïÌåµÄÖÊÁ¿ | |
B£® | ΪÁ˼õС³¤¶È²âÁ¿µÄÎó²î£¬Òª´Ó¼£µã¼ä¾à´óÓÚ4mm¿ªÊ¼Ñ¡È¡¼ÇÊýµã | |
C£® | ΪÁ˱£Ö¤³õËÙΪÁ㣬ҪѡȡµÚÒ»¡¢¶þÁ½µã¼äµÄ¾àÀë½Ó½ü2mmµÄÖ½´ø½øÐвâÁ¿ | |
D£® | ΪÁ˼õС³¤¶È²âÁ¿µÄÎó²î£¬Òª´Ó¼£µã¼ä¾à´óÓÚ4mmijµã¿ªÊ¼²âÁ¿h |
A£® | ²âÁ¿µç×èÇ°Òª°Ñºì¡¢ºÚ±í±ÊÏà½Ó£¬µ÷Õûµ÷ÁãÐýÅ¥£¬Ê¹Ö¸ÕëÖ¸ÔÚµç×è¿Ì¶ÈµÄÁãλÉÏ | |
B£® | ²âÁ¿µç×èʱ£¬Èç¹ûÖ¸ÕëÆ«½Ç¹ýС£¬Ó¦»»Óø߱¶Âʵµ | |
C£® | ²âÁ¿µç×èʱ£¬±íÕëƫת½Ç¶ÈÔ½´ó£¬ËµÃ÷±»²âµç×èµÄ×èÖµÔ½´ó | |
D£® | ²âÁ¿µç×èʱ£¬Ã¿´Î¸ü»»±¶Âʺ󣬲»ÐèÒªÖØе÷Áã |
A£® | ½»Á÷µçµÄƵÂÊΪ50 Hz | B£® | µçÁ÷±íµÄʾÊýΪ0.2 A | ||
C£® | µçÁ÷±íµÄʾÊýΪ$\sqrt{2}$ A | D£® | µçѹ±íµÄʾÊýΪ44 V |
A£® | ¼××öÖ±ÏßÔ˶¯£¬ÒÒ×öÇúÏßÔ˶¯ | |
B£® | t1ʱ¿Ì£¬¼×¡¢ÒÒÁ½³µÏàÓö | |
C£® | t1ʱ¿Ì£¬ÒÒ³µµÄ¼ÓËٶȴóÓڼ׳µµÄ¼ÓËÙ¶È | |
D£® | 0µ½Aʱ¼äÄÚ£¬ÒÒ³µµÄƽ¾ùËٶȴóÓڼ׳µµÄƽ¾ùËÙ¶È |