ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÓÃÈçͼËùʾµÄʵÑé×°ÖÃ×ö¡°Ì½¾¿¼ÓËÙ¶ÈÓëÁ¦¡¢ÖÊÁ¿¹Øϵ¡±µÄʵÑ飺
£¨1£©ÏÂÃæÁгöÁËһЩʵÑéÆ÷²Ä£ºµç´Å´òµã¼ÆʱÆ÷¡¢Ö½´ø¡¢´ø»¬Âֵij¤Ä¾°å¡¢µæ¿é¡¢Ð¡³µºÍíÀÂ롢ɰºÍÉ°Í°¡£³ýÒÔÉÏÆ÷²ÄÍ⣬»¹ÐèÒªµÄʵÑéÆ÷²ÄÓУº__________¡£
A£®Ììƽ£¨¸½íÀÂ룩 B£®Ãë±í C£®¿Ì¶È³ß£¨×îС¿Ì¶ÈΪmm£© D£®µÍѹ½»Á÷µçÔ´
£¨2£©ÊµÑéÖУ¬ÎªÁ˱£Ö¤É°ºÍÉ°Í°ËùÊܵÄÖØÁ¦½üËƵÈÓÚʹС³µ×öÔȼÓËÙÔ˶¯µÄÀÁ¦£¬É°ºÍÉ°Í°µÄ×ÜÖÊÁ¿mÓëС³µºÍ³µÉÏíÀÂëµÄ×ÜÖÊÁ¿MÖ®¼äÓ¦Âú×ãµÄÌõ¼þÊÇ___________¡£ÕâÑù£¬ÔڸıäС³µÉÏíÀÂëµÄÖÊÁ¿Ê±£¬Ö»ÒªÉ°ºÍÉ°Í°ÖÊÁ¿²»±ä£¬¾Í¿ÉÒÔÈÏΪС³µËùÊÜÀÁ¦¼¸ºõ²»±ä¡£
£¨3£©ÈçͼΪij´ÎʵÑéÖ½´ø£¬ÔÚÏàÁÚÁ½¼ÆÊýµã¼ä¶¼ÓÐËĸö´òµãδ»³ö£¬Óÿ̶ȳ߲âµÃ£ºS1£½0.55 cm£¬S2£½0.94 cm£¬S3£½1.35 cm£¬S4£½1.76 cm£¬S5£½2.15 cm£¬S6£½2.54 cm¡£
¢ÙÏàÁÚÁ½¼ÆÊýµã¼äµÄʱ¼ä¼ä¸ôΪ____________ s£»
¢Ú¼ÆÊýµã¡°6¡±ºÍ¡°7¡±µÄλÒÆS7±È½Ï½Ó½üÓÚ____________£¨Ìî¡°A¡¢B¡¢C¡¢D¡±ÐòºÅ£©
A£®2.76 cm B£®2.85 cm C£®2.96 cm D£®3.03 cm
¡¾´ð°¸¡¿ACD m<<M£» 0.1 C
¡¾½âÎö¡¿
£¨1£©±¾ÊµÑéµÄÄ¿µÄÊÇ̽¾¿¼ÓËÙ¶ÈÓëÁ¦¡¢ÖÊÁ¿¹Øϵ£¬ÓÃÉ°Í°µÄÖØÁ¦´ú±íС³µÊܵ½µÄºÏÍâÁ¦£¬ÐèÒªÓÃÌìƽ²âÉ°Í°ºÍС³µµÄÖÊÁ¿£¬¹ÊÑ¡AÏ
´òµã¼ÆʱÆ÷µÄ¹¤×÷µçԴΪµÍѹ½»Á÷µçÔ´£¨4-6V£©£¬¹¤×÷ƵÂÊΪ50Hz£¬ÖÜÆÚΪ0.02s£¬¿ÉÒÔ¼Æʱ£¬²»ÐèÒªÃë±í£¬¹ÊÑ¡DÏî¡¢²»Ñ¡BÏ´òµã¼ÆʱÆ÷´òÏÂÖ½´ø£¬ÐèÓÿ̶ȳ߲âÁ¿¾àÀ룬ÒÔÇó¼ÓËٶȺÍ˲ʱËٶȣ¬¹ÊÑ¡CÏî¡£¹ÊÑ¡ACD£»
£¨2£©É°Í°ºÍС³µÒ»ÆðÔ˶¯£¬¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉ£¬¶ÔÉ°Í°£ºmg-F=ma£¬¶ÔС³µ£ºF=Ma£¬¿ÉµÃС³µÊܵ½µÄÀÁ¦£¬±¾ÊµÑéÓÃÉ°Í°µÄÖØÁ¦´ú±íС³µÊܵ½µÄºÏÍâÁ¦£¨ÀÁ¦£©£¬Ö»ÓÐm£¼£¼Mʱ£¬²ÅÓÐF¡Ömg£¬ËùÒÔÉ°ºÍÉ°Í°µÄ×ÜÖÊÁ¿mÓëС³µºÍ³µÉÏíÀÂëµÄ×ÜÖÊÁ¿MÖ®¼äÓ¦Âú×ãµÄÌõ¼þÊÇm£¼£¼M£»
£¨3£©¢Ù´òµã¼ÆʱÆ÷µÄ¹¤×÷ÖÜÆÚΪT0=0.02s£¬ÏàÁÚÁ½¼ÆÊýµã¼ä¶¼ÓÐËĸö´òµãδ»³ö£¬ËùÒÔÁ½¼ÆÊýµãÖ®¼äµÄʱ¼ä¼ä¸ôΪT=5T0=0.1s¡£
¢Ú¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯µÄ¹æÂÉ£¬¿ÉÖª£ºS7=2S6-S5=2¡Á2.54-2.15=2.93cm£¬±È½Ï½Ó½üÓÚ2.96cm£¬¹ÊÑ¡CÏî¡£