ÁãÁã½ÌÓýÐÅÏ¢Íø Ê×Ò³ > ¿¼ÊÔ > ÎïÀí > ¸ßÖÐÎïÀí > ÊµÑ飺̽¾¿¼ÓËÙ¶ÈÓëÁ¦¡¢ÖÊÁ¿µÄ¹Øϵ > ÕýÎÄ ·µ»Ø¡¡´òÓ¡

ijͬѧΪ̽¾¿¡°ºÏÁ¦×ö¹¦ÓëÎïÌ嶯ÄܸıäµÄ¹Øϵ¡±£¬Éè¼ÆÁËÈçÏÂʵÑ飬ËûµÄ²Ù×÷²½ÖèÊÇ£º¢Ù°´Í¼£¨a£©°ÚºÃʵÑé×°Öã¬ÆäÖÐС³µÖÊÁ¿M=0£®20kg£¬¹³Âë×ÜÖÊÁ¿m=0£®05kg£®¢ÚÊÍ·ÅС³µ£¬È»ºó½Óͨ´òµã

ÍøÓÑͶ¸å  2022-10-27 00:00:00  »¥ÁªÍø

¡ò ÌâÄ¿

ijͬѧΪ̽¾¿¡°ºÏÁ¦×ö¹¦ÓëÎïÌ嶯ÄܸıäµÄ¹Øϵ¡±£¬Éè¼ÆÁËÈçÏÂʵÑ飬ËûµÄ²Ù×÷²½ÖèÊÇ£º   
¢Ù°´Í¼£¨a£©°ÚºÃʵÑé×°Öã¬ÆäÖÐС³µÖÊÁ¿M=0£®20kg£¬¹³Âë×ÜÖÊÁ¿m=0£®05kg£®
¢ÚÊÍ·ÅС³µ£¬È»ºó½Óͨ´òµã¼ÆʱÆ÷µÄµçÔ´£¨µçԴƵÂÊΪ=50Hz£©£¬´ò³öÒ»ÌõÖ½´ø£®

СÌâ1:ËûÔÚ¶à´ÎÖظ´ÊµÑéµÃµ½µÄÖ½´øÖÐÈ¡³ö×ÔÈÏΪÂúÒâµÄÒ»Ìõ£¬Èçͼ£¨b£©Ëùʾ£®°Ñ´òϵĵÚÒ»µã¼Ç×÷0£¬È»ºóÒÀ´ÎÈ¡Èô¸É¸ö¼ÆÊýµã£¬ÏàÁÚ¼ÆÊýµã¼ä»¹ÓÐ4¸öµãδ»­³ö£¬ÓÃÀåÃ׿̶ȳ߲âµÃ¸÷¼ÆÊýµãµ½0µã¾àÀë·Ö±ðΪ£¬¡­£¬Ëû°Ñ¹³ÂëÖØÁ¦£¨µ±µØÖØÁ¦¼ÓËÙ¶Èg=9£®8m£¯s2£©×÷ΪС³µËùÊܺÏÁ¦Ëã³ö´òÏÂ0µãµ½´òϵÚ5µãºÏÁ¦×ö¹¦£®

W=          J£¨½á¹û±£ÁôÈýλÓÐЧÊý×Ö£©£¬ÓÃÕýÈ·µÄ¹«Ê½=           £¨ÓÃÏà¹ØÊý¾ÝÇ°×ÖĸÁÐʽ£©°Ñ´òϵÚ5µãʱС³µ¶¯ÄÜ×÷ΪС³µ¶¯ÄܵĸıäÁ¿£¬ËãµÃ£®
СÌâ2:´Ë´ÎʵÑé̽¾¿µÄ½á¹û£¬ËûûÄܵõ½¡°ºÏÁ¦¶ÔÎïÌå×öµÄ¹¦£¬µÈÓÚÎïÌ嶯ÄܵÄÔöÁ¿¡±£¬ÇÒÎó²îºÜ´ó¡£Í¨¹ý·´Ë¼£¬ËûÈÏΪ²úÉúÎó²îµÄÔ­ÒòÈçÏ£¬ÆäÖÐÕýÈ·µÄÊÇ         £®
A£®¹³ÂëÖÊÁ¿Ì«´ó£¬Ê¹µÃºÏÁ¦¶ÔÎïÌå×ö¹¦µÄ²âÁ¿Öµ±ÈÕæʵֵƫ´óÌ«¶à
B£®Ã»ÓÐƽºâĦ²ÁÁ¦£¬Ê¹µÃºÏÁ¦¶ÔÎïÌå×ö¹¦µÄ²âÁ¿Öµ±ÈÕæʵֵƫ´óÌ«¶à
C£®ÊÍ·ÅС³µºÍ½ÓͨµçÔ´µÄ´ÎÐòÓÐÎó£¬Ê¹µÃ¶¯ÄÜÔöÁ¿µÄ²âÁ¿Öµ±ÈÕæʵֵƫС
D£®Ã»ÓÐʹÓÃ×îС¿Ì¶ÈΪºÁÃ׵Ŀ̶ȳ߲â¾àÀëÒ²ÊDzúÉú´ËÎó²îµÄÖØÒªÔ­Òò

¡ò ´ð°¸


СÌâ1:0.176  
СÌâ2:AB

¡ò ½âÎö

·ÖÎö£º£¨1£©½«íÀÂëÖØÁ¦µ±×÷С³µËùÊܺÏÍâÁ¦£¬¸ù¾Ý¹¦µÄ¶¨Òå¿ÉÒÔÕýÈ·½â´ð£¬¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯ÖÐʱ¼äÖеãµÄ˲ʱËٶȵÈÓڸùý³ÌÖеÄƽ¾ùËٶȿÉÒÔÇó³öµÚ5¸öµãµÄËٶȴóС£¬½øÒ»²½Çó³öÆ䶯ÄÜ´óС£»
£¨2£©ÊµÑéÎó²îÖ÷ÒªÀ´×ÔÁ½¸ö·½ÃæÒ»ÊÇÓÉʵÑéÔ­Àí²»ÍêÉƵ¼ÖµÄϵͳÎó²î£¬Ò»ÊÇÓÉÊý¾Ý²âÁ¿Èç²âÁ¿¾àÀëµÈµ¼ÖµÄżȻÎó²î£¬¿ÉÒÔ´ÓÕâÁ½¸ö·½Ãæ½øÐзÖÎö£®
½â´ð£º½â£º£¨1£©¸ù¾ÝÌâÒâÎïÌåËùÊܺÏÍâÁ¦Îª£ºF=mg=0.05¡Á9.8=0.49N£¬
¸ù¾Ý¹¦µÄ¶¨Òå¿ÉÖª£ºW=Fs=mgh=0.176J£»
¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯ÖÐʱ¼äÖеãµÄ˲ʱËٶȵÈÓڸùý³ÌÖеÄƽ¾ùËٶȿÉÒÔÇó³öµÚ5¸öµãµÄËٶȴóСΪ£º
v=(d6-d4)/2T
£¨ÆäÖÐT=5¡Á1/f=5/f£©
¶¯Äܹ«Ê½Îª£ºEk=
mv2/2= Mf2(d6-d4)2/200
¹Ê´ð°¸Îª£º0.176£»Mf2(d6-d4)2/200
£¨2£©A¡¢ÉèÉþ×ÓÉÏÀ­Á¦ÎªF£¬¶ÔС³µ¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÓУº
¶ÔС³µ£ºF=Ma   ¢Ù
¶Ô¹³ÂëÓУºmg-F=ma  ¢Ú
F=" mgM/(M+m)=" mg/(1+m/M)
£¬ÓÉ´Ë¿ÉÖªµ±M£¾£¾mʱ£¬¹³ÂëµÄÖØÁ¦µÈÓÚÉþ×ÓµÄÀ­Á¦£¬Òò´Ëµ±¹³ÂëÖÊÁ¿Ì«´óʱ£¬»áÔì³É½Ï´óÎó²î£¬¹ÊAÕýÈ·£»
B¡¢ÊµÑéÖÐÒª½øÐÐƽºâĦ²ÁÁ¦²Ù×÷£¬ÈôûÓÐƽºâĦ²ÁÁ¦Ö±½Ó½«¹³ÂëÖØÁ¦×öµÄ¹¦µ±×öС³µºÏÍâÁ¦×öµÄ¹¦£¬»áÔì³É½Ï´óÎó²î£¬¹ÊBÕýÈ·£»
C¡¢ÊÍ·ÅС³µºÍ½ÓͨµçÔ´µÄ˳ÐòÓÐÎó£¬Ó°Ïì´òµã¶àÉÙ£¬²»Ò»¶¨»áʹ¶¯ÄܵIJâÁ¿Æ«Ð¡£¬¹ÊC´íÎó£»
D¡¢¾àÀëµÄ²âÁ¿²úÉúµÄÎó²î²»ÊǸÃʵÑé²úÉúµÄÖ÷ÒªÎó²î£¬¹ÊD´íÎó£®
¹ÊÑ¡AB£®
µãÆÀ£ºÃ÷ȷʵÑéÔ­ÀíÍùÍùÊǽâ¾öʵÑéÎÊÌâµÄ¹Ø¼ü£¬¸ÃʵÑéµÄһЩ²Ù×÷ºÍÒªÇóÓë̽¾¿Á¦¡¢¼ÓËٶȡ¢ÖÊÁ¿Ö®¼ä¹ØϵµÄʵÑéÀàËÆ¿ÉÒÔÀà±Èѧϰ£®

¡ò ֪ʶµã

    ×¨¼Ò·ÖÎö£¬ÊÔÌ⡰ijͬѧΪ̽¾¿¡°ºÏÁ¦×ö¹¦ÓëÎïÌ嶯ÄܸıäµÄ¹Øϵ¡±£¬Éè¼ÆÁËÈçÏÂʵÑ飬ËûµÄ²Ù×÷²½ÖèÊÇ£º¢Ù°´Í¼£¨a£©°ÚºÃʵÑé×°Öã¬ÆäÖÐС³µÖÊÁ¿M=0£®20kg£¬¹³Âë×ÜÖÊÁ¿m=0£®05kg£®¢ÚÊÍ·ÅС³µ£¬È»ºó½Óͨ´òµã¡­¡±Ö÷Òª¿¼²éÁËÄã¶Ô  ¡¾ÊµÑ飺̽¾¿Ð¡³µËÙ¶ÈËæʱ¼ä±ä»¯µÄ¹æÂÉ¡¿£¬¡¾ÊµÑ飺̽¾¿µ¯Á¦Ó뵯»ÉÉ쳤µÄ¹Øϵ¡¿£¬¡¾ÊµÑ飺̽¾¿¼ÓËÙ¶ÈÓëÁ¦¡¢ÖÊÁ¿µÄ¹Øϵ¡¿£¬¡¾ÊµÑ飺̽¾¿¹¦ÓëËٶȱ仯µÄ¹Øϵ¡¿  µÈ֪ʶµãµÄÀí½âºÍÓ¦ÓÃÄÜÁ¦¡£¹ØÓÚÕâЩ֪ʶµãµÄ¡°µµ°¸¡±£¬Äã¿ÉÒÔµã»÷ÏàÓ¦µÄÁ´½Ó½øÐв鿴ºÍѧϰ¡£



http://www.00-edu.com/html/202210/331119.htmlÊ®¶þÉúФ
Ê®¶þÐÇ×ù