ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÈçͼËùʾ£¬Äڱڹ⻬¡¢½ØÃæ»ý²»ÏàµÈµÄÔ²ÖùÐÎÆû¸×ÊúÖ±·ÅÖã¬Æû¸×ÉÏ¡¢ÏÂÁ½²¿·ÖµÄºá½ØÃæ»ý·Ö±ðΪ2SºÍS¡£ÔÚÆû¸×ÄÚÓÐA¡¢BÁ½»îÈû·â±Õ×ÅÒ»¶¨ÖÊÁ¿µÄÀíÏëÆøÌ壬Á½»îÈûÓÃÒ»¸ù³¤ÎªlµÄϸÇá¸ËÁ¬½Ó£¬Á½»îÈûµ¼ÈÈÐÔÄÜÁ¼ºÃ£¬²¢ÄÜÔÚÆû¸×ÄÚÎÞĦ²ÁµØÒƶ¯¡£ÒÑÖª»îÈûAµÄÖÊÁ¿ÊÇ2m£¬»îÈûBµÄÖÊÁ¿ÊÇm¡£µ±Íâ½ç´óÆøѹǿΪp0¡¢Î¶ÈΪT0ʱ£¬Á½»îÈû¾²Ö¹ÓÚÈçͼËùʾλÖá£ÖØÁ¦¼ÓËÙ¶ÈΪg¡£
¢ÙÇó´ËʱÆû¸×ÄÚÆøÌåµÄѹǿ¡£
¢ÚÈôÓÃÒ»ÊúÖ±ÏòϵÄÀÁ¦×÷ÓÃÔÚBÉÏ£¬Ê¹A¡¢BÒ»ÆðÓÉͼʾλÖÿªÊ¼»ºÂýÏòÏÂÒƶ¯µÄ¾àÀ룬ÓÖ´¦ÓÚ¾²Ö¹×´Ì¬£¬ÇóÕâʱÆû¸×ÄÚÆøÌåµÄѹǿ¼°ÀÁ¦FµÄ´óС¡£ÉèÕû¸ö¹ý³ÌÖÐÆøÌåζȲ»±ä¡£
¡¾´ð°¸¡¿£¨1£©p0£«£¨2£©
¡¾½âÎö¡¿ÊÔÌâ·ÖÎö£º£¨1£©ÒÔÁ½»îÈûÕûÌåΪÑо¿¶ÔÏó£¬Éè´ËʱÆø¸×ÄÚÆøÌåѹǿΪp1£¬¸ù¾ÝƽºâÌõ¼þÔòÓУº
p0S+3mg=p1S
½âµÃ£º
£¨2£©¶Ô¸×ÄÚÆøÌåÑо¿
³õ̬£º£¬V1=2LS
ĩ̬£ºÑ¹Ç¿ÎªP2£¬V2=LS
Óɲ£Òâ¶ú¶¨ÂÉÓÐ £ºP1V1= P2V2
ÒÔÁ½»îÈûÕûÌåΪÑо¿¶ÔÏ󣬸ù¾ÝƽºâÌõ¼þÓУºP2S=F-P0S+3mg
ÁªÁ¢½âµÃ£º £»