ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÈçͼËùʾ£¬Ò»Ö±Á¢µÄÆû¸×ÓÃÒ»ÖÊÁ¿ÎªmµÄ»îÈû·â±ÕÒ»¶¨Á¿µÄÀíÏëÆøÌ壬»îÈûºá½ØÃæ»ýΪS £¬ Æû¸×Äڱڹ⻬ÇҸױÚÊǵ¼Èȵģ®¿ªÊ¼»îÈû±»¹Ì¶¨£¬´ò¿ª¹Ì¶¨ÂÝ˨K £¬ »îÈûÏÂÂ䣬¾¹ý×ã¹»³¤Ê±¼äºó£¬»îÈûÍ£ÔÚBµã£¬ÒÑÖªAB=h £¬ ´óÆøѹǿΪp0 £¬ ÖØÁ¦¼ÓËÙ¶ÈΪg £®
£¨1£©Çó»îÈûÍ£ÔÚBµãʱ¸×ÄÚ·â±ÕÆøÌåµÄѹǿ£»
£¨2£©ÉèÖÜΧ»·¾³Î¶ȱ£³Ö²»±ä£¬ÇóÕû¸ö¹ý³ÌÖÐͨ¹ý¸×±Ú´«µÝµÄÈÈÁ¿Q£¨Ò»¶¨Á¿ÀíÏëÆøÌåµÄÄÚÄܽöÓÉζȾö¶¨£©£®
¡¾´ð°¸¡¿
£¨1£©Éè·â±ÕÆøÌåµÄѹǿΪp£¬»îÈûÊÜÁ¦Æ½ºâ£º
P0S+mg=PS
½âµÃ P= £¨2£©ÓÉÓÚÆøÌåµÄζȲ»±ä£¬ÔòÄÚÄܵı仯¡÷E=0
ÓÉÈÈÁ¦Ñ§µÚÒ»¶¨ÂÉ¡÷E=W+Q
¿ÉµÃ·ÅÈÈ£ºQ=£¨P0S+mg£©h
´ð£º£¨1£©·â±ÕÆøÌåµÄѹǿP=
£¨2£©ÓÉÓÚÆøÌåµÄζȲ»±ä£¬ÔòÄÚÄܵı仯¡÷E=0
ÓÉÈÈÁ¦Ñ§µÚÒ»¶¨ÂÉ¡÷E=W+Q
¿ÉµÃ·ÅÈÈ£ºQ=£¨P0S+mg£©h
¡¾½âÎö¡¿½â´ð£º£¨1£©Éè·â±ÕÆøÌåµÄѹǿΪp £¬ »îÈûÊÜÁ¦Æ½ºâ£º P0S+mg=PS
½âµÃ P= £¨2£©ÓÉÓÚÆøÌåµÄζȲ»±ä£¬ÔòÄÚÄܵı仯¡÷E=0
ÓÉÈÈÁ¦Ñ§µÚÒ»¶¨ÂÉ¡÷E=W+Q
¿ÉµÃ·ÅÈÈ£ºQ=£¨P0S+mg£©h
´ð£º£¨1£©·â±ÕÆøÌåµÄѹǿP= £¨2£©Õû¸ö¹ý³ÌÖÐͨ¹ý¸×±Ú´«µÝµÄÈÈÁ¿Q=£¨P0S+mg£©h
·ÖÎö£º£¨1£©Ñ¡»îÈûΪÑо¿¶ÔÏ󣬶ÔÆäÁÐÊÜÁ¦Æ½ºâ·½³Ì¼´¿É£¨2£©ÓÉÓڴ˹ý³ÌΪµÈιý³Ì£¬ÆøÌåÄÚÄܲ»±ä£¬¸ù¾ÝÈÈÁ¦Ñ§µÚÒ»¶¨ÂÉÁз½³Ì½â¾ö¼´¿É
¡¾¿¼µã¾«Îö¡¿½â´ð´ËÌâµÄ¹Ø¼üÔÚÓÚÀí½âÈÈÁ¦Ñ§µÚÒ»¶¨ÂɵÄÏà¹Ø֪ʶ£¬ÕÆÎÕÈÈÁ¦Ñ§µÚÒ»¶¨Âɵıí´ïʽ:W+Q=¦¤U£»·ûºÅ·¨Ôò:Íâ½ç¶ÔÎïÌå×ö¹¦£¬WÈ¡ÕýÖµ£¬ÎïÌå¶ÔÍâ½ç×ö¹¦£¬WÈ¡¸ºÖµ;ÎïÌåÎüÊÕÈÈÁ¿£¬QÈ¡ÕýÖµ£¬ÎïÌå·Å³öÈÈÁ¿£¬QÈ¡¸ºÖµ;ÎïÌåÄÚÄÜÔö¼Ó£¬¦¤UÈ¡ÕýÖµ£¬ÎïÌåÄÚÄܼõÉÙ£¬¦¤UÈ¡¸ºÖµ£®
¡¾ÌâÄ¿¡¿Èçͼ¼×ËùʾÊÇijͬѧ̽¾¿¼ÓËÙ¶ÈÓëÁ¦µÄ¹ØϵµÄʵÑé×°Öã®ËûÔÚÆøµæµ¼¹ìÉÏ°²×°ÁËÒ»¸ö¹âµçÃÅB£¬»¬¿éÉϹ̶¨Ò»ÕÚ¹âÌõ£¬»¬¿éÓÃϸÏßÈƹýÆøµæµ¼¹ì×ó¶ËµÄ¶¨»¬ÂÖÓëÁ¦´«¸ÐÆ÷ÏàÁ¬£¬Á¦´«¸ÐÆ÷¿ÉÖ±½Ó²â³öÉþÖÐÀÁ¦£¬´«¸ÐÆ÷Ï·½Ðü¹Ò¹³Â룬ÿ´Î»¬¿é¶¼´ÓA´¦Óɾ²Ö¹ÊÍ·Å¡£Æøµæµ¼¹ìĦ²Á×èÁ¦ºÜС¿ÉºöÂÔ²»¼Æ£¬ÓÉÓÚÕÚ¹âÌõµÄ¿í¶ÈºÜС£¬¿ÉÈÏΪÕÚ¹âÌõͨ¹ý¹âµçÃÅʱËٶȲ»±ä¡£
£¨1£©¸ÃͬѧÓÃÓα꿨³ß²âÁ¿ÕÚ¹âÌõµÄ¿í¶Èd£¬ÈçͼÒÒËùʾ£¬Ôòd= mm£®
£¨2£©ÊµÑéʱ£¬¸ÃͬѧÓÃÓα꿨³ß²âÁ¿ÕÚ¹âÌõµÄ¿í¶Èd£¬½«»¬¿é´ÓAλÖÃÓɾ²Ö¹ÊÍ·Å£¬²âÁ¿ÕÚ¹âÌõµ½¹âµçÃŵľàÀëL£¬ÈôÒªµÃµ½»¬¿éµÄ¼ÓËٶȣ¬»¹ÐèÓÉÊý×Ö¼ÆʱÆ÷¶Á³öÕÚ¹âÌõͨ¹ý¹âµçÃÅBµÄ £»
£¨3£©ÏÂÁв»±ØÒªµÄÒ»ÏîʵÑéÒªÇóÊÇ( )¡£
A£®Ó¦Ê¹»¬¿éÖÊÁ¿Ô¶´óÓÚ¹³ÂëºÍÁ¦´«¸ÐÆ÷µÄ×ÜÖÊÁ¿ |
B£®Ó¦Ê¹AλÖÃÓë¹âµçÃżäµÄ¾àÀëÊʵ±´óЩ |
C£®Ó¦½«Æøµæµ¼¹ìµ÷½Úˮƽ |
D£®Ó¦Ê¹Ï¸ÏßÓëÆøµæµ¼¹ìƽÐÐ |
£¨4£©¸Ä±ä¹³ÂëÖÊÁ¿£¬²â³ö¶ÔÓ¦µÄÁ¦´«¸ÐÆ÷µÄʾÊýF£¬ÒÑÖª»¬¿é×ÜÖÊÁ¿ÎªM,Óã¨2£©ÎÊÖÐÒѲâÎïÀíÁ¿ºÍÒѸøÎïÀíÁ¿Ð´³öMºÍF¼äµÄ¹Øϵ±í´ïʽF= ¡£