ÌâÄ¿ÄÚÈÝ

¡¾ÌâÄ¿¡¿¡°×À²¼ÌôÕ½¡±ÊÇ2019Äê×îÁ÷ÐеÄÍøºìÌôÕ½ÏîÄ¿Ö®Ò»£¬ÆäÌôÕ½¹æÔòÊÇÒ»¸öÈËÓÃÁ¦³é×ß×À²¼£¬Í¬Ê±±£Ö¤×À×ÓÉϵIJ;ߡ°²»¶¯¡±£¨ÈâÑ۹۲첻µ½²Í¾ßλÖ÷¢Éú±ä»¯£©¡£ÏÖ½«¸ÃÌôÕ½×öÈçͼËùʾµÄ¼ò»¯£¬ÔÚ×ÀÃæÉÏ·ÅÖÃÒ»¿é×À²¼£¬½«Ò»¸ö¿ÉÊÓΪÖʵãµÄÕý·½Ìå¾²ÖÃÓÚ×À²¼ÉÏ£¬Ð¡Ã÷¶Ô×À²¼Ê©¼ÓˮƽÏòÓÒµÄÀ­Á¦½«×À²¼Ñ¸ËÙ³é³ö¡£ÈôÕý·½ÌåºÍ×À²¼µÄÖÊÁ¿·Ö±ðΪmºÍM£¬Õý·½ÌåÓë×À²¼¼äµÄ¶¯Ä¦²ÁÒòÊýΪ£¬×À²¼¡¢Õý·½ÌåÓë×ÀÃæ¼äµÄ¶¯Ä¦²ÁÒòÊý¾ùΪ£¬ÖØÁ¦¼ÓËÙ¶ÈΪg£¬×î´ó¾²Ä¦²ÁÁ¦µÈÓÚ»¬¶¯Ä¦²ÁÁ¦¡£

(1)ÈôҪʹÕý·½ÌåÏà¶Ô×À²¼¾²Ö¹£¬ÇóÀ­Á¦µÄ×î´óÖµT£»

(2)ÓÒÈËÈâÑÛ¸ÐÖªÎïÌå¡°²»¶¯¡±µÄ×î´ó¾àÀë=0.0075m£¬m=1kg£¬M=2kg£¬£¬£¬g=10m/s2£¬Õý·½ÌåÓë×À²¼×ó¶ËµÄ¾àÀëd=0.04m£¬ÇóСÃ÷Íê³É¡°×À²¼ÌôÕ½¡±ÐèÒªÌṩµÄ×îСÀ­Á¦F¡£

¡¾´ð°¸¡¿(1)£»(2) 25N

¡¾½âÎö¡¿

(1)ÉèÕý·½ÌåµÄ×î´ó¼ÓËÙ¶ÈΪa1£¬×À²¼µÄ¼ÓËٶȴóСΪa2£¬¶ÔÕý·½Ìå¡¢×À²¼·Ö±ðÊÜÁ¦·ÖÎöÓÐ

Õý·½ÌåºÍ×À²¼±£³ÖÏà¶Ô¾²Ö¹Ó¦Âú×ã

½âµÃÀ­Á¦µÄ×î´óֵΪ

¡£

(2)ÉèÕý·½ÌåÔÚ×À²¼ÉÏÔ˶¯µÄλÒÆ´óСΪx1£¬¼ÓËٶȴóСΪa3£¬Ê±¼äΪt1£»Õý·½ÌåÀ뿪×À²¼ºóÔ˶¯µÄλÒÆ´óСΪx2£¬¼ÓËٶȴóСΪa4£¬Ê±¼äΪt2£»Õý·½Ìå´Ó×À²¼ÉÏÀ뿪ǰ£¬×À²¼µÄ¼ÓËٶȴóСΪa5£¬×À²¼Ô˶¯µÄλÒÆ´óСΪx3£¬ÓÐ

ÈôÒªÍê³ÉÌôÕ½£¬ÔòÕý·½ÌåÒƶ¯µÄ×ÜλÒƱØÐëСÓÚ»òµÈÓÚÈËÈâÑÛ¸ÐÖªÎïÌå¡°²»¶¯¡±µÄ×î´ó¾àÀ룬¿¼ÂÇÁÙ½çÖµ

ÓÉÕý·½ÌåÏÈ´ÓÁ㿪ʼ×öÔȼÓËÙÔ˶¯£¬ºó×öÔȼõËÙÔ˶¯£¬×îÖÕ¾²Ö¹ÔÚ×ÀÃæÉÏ£¬ÓÐ

ÁªÁ¢¿ÉµÃ

F=25N

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

¡¾ÌâÄ¿¡¿Ä³Ñо¿ÐÔѧϰС×éʹÓÃÈçͼ¼×ËùʾµÄʵÑé×°Ö㬲ⶨСľ¿éÓëÇãб¹ìµÀ¼äµÄ¶¯Ä¦²ÁÒòÊý¡£Çãб¹ìµÀµÄ¶¥¶ËÓÐÒ»¹Ì¶¨µ²°å£¬¹ìµÀÉÏÓÐÁ½¸öλÖÿɵ÷½ÚµÄ¹âµçÃÅAºÍ¹âµçÃÅB¡£ËûÃǽ«Ò»¸öÕÚ¹âÌõ°²×°ÔÚСľ¿éÉÏ£¬²¢Óÿ̶ȳ߲âÁ¿ÕÚ¹âÌõµÄ¿í¶Èd¡£ÒÑÖª¹ìµÀµÄÇã½ÇΪ£¬µ±µØµÄÖØÁ¦¼ÓËٶȴóСΪg¡£ÊµÑé²Ù×÷ÈçÏ£º

¢Ù½«¹âµçÃÅB¹Ì¶¨ÔÚÀëµ²°å½ÏÔ¶µÄλÖã¬Ê¹Ð¡Ä¾¿é´Ó½ô¿¿µ²°åµÄλÖÃÓɾ²Ö¹ÊÍ·Å£»

¢Ú²âµÃij´ÎÕÚ¹âÌõͨ¹ý¹âµçÃÅAµÄʱ¼äΪ¡÷t1£¬ÕÚ¹âÌõͨ¹ý¹âµçÃÅBµÄʱ¼äΪ¡÷t2ÒÔ¼°Á½¸ö¹âµçÃÅÖ®¼äµÄ¾àÀëx£»

¢Û¸Ä±ä¹âµçÃÅAµÄλÖã¬Öظ´ÒÔÉϲÙ×÷£¬¼Ç¼¶à×é¡÷t1¡¢xµÄÖµ¡£Çë»Ø´ðÒÔÏÂÎÊÌ⣺

(1)²½Öè¢ÚÖУ¬Ð¡Ä¾¿éͨ¹ý¹âµçÃÅAµÄËٶȴóСvA=_____£¨ÓÃÌâÄ¿ÖÐËù¸øÎïÀíÁ¿µÄ×Öĸ±íʾ£©¡£

(2)ÀûÓÃͼÏóÀ´´¦ÀíʵÑéÊý¾Ý£¬×÷³öµÄͼÏóÈçͼÒÒËùʾ£¬Èô¸ÃͼÏóµÄбÂʵľø¶ÔֵΪk£¬Ôò¶¯Ä¦²ÁÒòÊýµÄ±í´ïʽΪ=_____£¨ÓÃÌâÄ¿ÖÐËù¸øÎïÀíÁ¿µÄ×Öĸ±íʾ£¬ÇÒºöÂÔ¿ÕÆø×èÁ¦£©

(3)Èô¿¼ÂÇ¿ÕÆø×èÁ¦£¬ÔòËûÃÇÀûÓõÚ(2)ÌâµÃµ½µÄ±í´ïʽÇó³öµÄ¶¯Ä¦²ÁÒòÊý_____£¨Ñ¡Ìî¡°Æ«´ó¡±¡°Æ«Ð¡¡±»ò¡°Ã»ÓÐÓ°Ï족£©¡£

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø