ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿±Ä¼«ÊÇÒ»Ïî·Ç³£´Ì¼¤µÄÔ˶¯£¬ÎªÁËÑо¿±Ä¼«¹ý³Ì£¬¿É½«ÈËÊÓΪÖʵ㣬È˵ÄÔ˶¯ÑØÊúÖ±·½Ïò£¬ÈËÀ뿪±Ä¼«Ì¨Ê±µÄ³õËٶȡ¢µ¯ÐÔÉþµÄÖÊÁ¿£¬¿ÕÆø×èÁ¦¾ù¿ÉºöÂÔ¡£Ä³´Î±Ä¼«Ê±£¬È˴ӱļ«Ì¨ÌøÏ£¬µ½Aµãʱµ¯ÐÔÉþÇ¡ºÃÉìÖ±£¬È˼ÌÐøÏÂÂ䣬Äܵ½´ïµÄ×îµÍλÖÃΪBµã£¬ÈçͼËùʾ¡£ÒÑÖªÈ˵ÄÖÊÁ¿m=50kg£¬µ¯ÐÔÉþµÄµ¯Á¦´óСF=kx£¬ÆäÖÐxΪµ¯ÐÔÉþµÄÐαäÁ¿£¬k=200N/m£¬µ¯ÐÔÉþµÄÔ³¤=10m,Õû¸ö¹ý³ÌÖе¯ÐÔÉþµÄÐαäʼÖÕÔÚµ¯ÐÔÏÞ¶ÈÄÚ¡£È¡ÖØÁ¦¼ÓËÙ¶Èg=10m/
£¬ÔÚÈËÀ뿪±Ä¼«Ì¨ÖÁµÚÒ»´Îµ½´ïBµãµÄ¹ý³ÌÖУ¬»úеÄÜËðʧ¿ÉºöÂÔ¡£
(1)ÇóÈ˵ÚÒ»´Îµ½´ïAµãʱµÄ¶¯ÄÜ
(2)ÇóÈ˵ÚÒ»´ÎËٶȴﵽ×î´óʱ£¬¾àÀë±Ä¼«Ì¨µÄ¾àÀ룻
(3)ÒÑÖªµ¯ÐÔÉþµÄÐαäÁ¿Îªxʱ£¬ËüµÄµ¯ÐÔÊÆÄÜ=
¡£ÇóBµãÓë±Ä¼«Ì¨¼äµÄ¾àÀë
¡¾´ð°¸¡¿(1)5000J (2)12.5m (3)20m
¡¾½âÎö¡¿
(1)ÓÉ»úеÄÜÊغ㶨ÂÉ¿ÉÖª£¬È˵ÚÒ»´Îµ½´ïAµãʱµÄ¶¯ÄÜ
(2) È˵ÚÒ»´ÎËٶȴﵽ×î´óʱ£¬ÖØÁ¦µÈÓÚµ¯Á¦£¬¼´
½âµÃ
¾àÀë±Ä¼«Ì¨µÄ¾àÀë
(3)´Ó¿ªÊ¼ÏÂÂäµ½BµãµÄ¹ý³Ì£¬ÓÉ»úеÄÜÊغ㶨ÂÉ£º
½âµÃ
L2=20m£¨L2=5mÉáµô£©
![](http://thumb2018.1010pic.com/images/loading.gif)