ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÊúÖ±ÃæÄÚÒ»Çãб¹ìµÀÓëÒ»×ã¹»³¤µÄˮƽ¹ìµÀͨ¹ýһС¶Î¹â»¬Ô²»¡Æ½»¬Á¬½Ó£¬Ð¡Îï¿éB¾²Ö¹ÓÚˮƽ¹ìµÀµÄ×î×ó¶Ë£¬Èçͼ£¨a£©Ëùʾ¡£t=0ʱ¿Ì£¬Ð¡Îï¿éAÔÚÇãб¹ìµÀÉÏ´Ó¾²Ö¹¿ªÊ¼Ï»¬£¬Ò»¶Îʱ¼äºóÓëB·¢ÉúÅöײ£¨Åöײʱ¼ä¼«¶Ì£©£»µ±A·µ»Øµ½Çãб¹ìµÀÉϵÄPµã£¨Í¼ÖÐδ±ê³ö£©Ê±£¬ËٶȼõΪ0£¬´Ëʱ¶ÔÆäÊ©¼ÓÒ»ÍâÁ¦£¬Ê¹ÆäÔÚÇãб¹ìµÀÉϱ£³Ö¾²Ö¹¡£Îï¿éAÔ˶¯µÄv-tͼÏñÈçͼ£¨b£©Ëùʾ£¬Í¼ÖеÄv1ºÍt1¾ùΪδ֪Á¿£»Åöºó˲¼äBµÄËٶȴóСҲΪv1£¬Ö®ºóÑØˮƽ¹ìµÀÏòÓÒ¼õËٶȣ¬²»¼Æ¿ÕÆø×èÁ¦¡£
(1)ÇóAÑØÇãб¹ìµÀÏ»¬µÄ¼ÓËÙ¶ÈÓëÅöºóÑعìµÀÉÏ»¬µÄ¼ÓËٶȴóС֮±È£»
(2)ÈôÇãб¹ìµÀÓëˮƽÃæµÄ¼Ð½ÇΪ¦È£¬ÇóAÓëÇãб¹ìµÀ¼äµÄ¶¯Ä¦²ÁÒòÊý¦Ì£»
(3)ÒÑÖªÁ½Îï¿éÓë¹ìµÀ¼äµÄ¶¯Ä¦²ÁÒòÊý¾ùÏàµÈ£¬ÔÚÎï¿éBÍ£Ö¹Ô˶¯ºó£¬¸Ä±äÎï¿éÓë¹ìµÀ¼äµÄ¶¯Ä¦²ÁÒòÊý£¬È»ºó½«A´ÓPµãÊÍ·Å£¬Ò»¶Îʱ¼äºóA¸ÕºÃÄÜÓëBÔÚ´ËÅöÉÏ¡£Çó¸Ä±äÇ°ºó¶¯Ä¦²ÁÒòÊýµÄ±ÈÖµ¡£
¡¾´ð°¸¡¿(1)£»(2)£»(3)¡£
¡¾½âÎö¡¿
(1)ÓÉ£¨b£©Í¼¿ÉÖª£¬AÏòϼÓËٵļÓËÙ¶ÈΪ
£¬
ÏòÉϼõËٵļÓËÙ¶ÈΪ
£¬
ËùÒÔ
£»
(2)¶ÔA½øÐÐÊÜÁ¦·ÖÎö£¬Ï»¬ÓëÉÏ»¬Èçͼ£º
Ï»¬ ÉÏ»¬
Ï»¬Ê±£¬ÑØбÃæ·½Ïò£º
´¹Ö±Ð±Ãæ·½Ïò£º
£»
ÉÏ»¬Ê±£¬ÑØбÃæ·½Ïò£º
´¹Ö±Ð±Ãæ·½Ïò£º
£¬
ÇÒ£º
ÁªÁ¢ÉÏÃæ¸÷ʽ½âµÃ
£¬
£¬
ÒòΪ
£¬
½âµÃ
µÃ
£»
(3)¶ÔBÔÚˮƽÃæ½øÐÐÊÜÁ¦·ÖÎö¿ÉµÃ£ºÊúÖ±Ïò£º
ˮƽÏòÓÉ
ÇÒ
½âµÃ
ËùÒÔBÒƶ¯µÄ¾àÀë
£¬
ÓÉ(2)Öª£¬AÉÏ»¬µ½PµãʱµÄ¾àÀë
¸Ä±ä¶¯Ä¦²ÁÒòÊýΪ£¬ÓÉ(2)¿ÉÖª£¬´ËʱÏ»¬µÄ¼ÓËÙ¶È
£¬
A»¬µ½µ×¶ËʱµÄËÙ¶ÈΪv2£¬Ôò
¢Ù£¬
´ËºóAÔÚˮƽ¹ìµÀÉÏ×öÔȼõËÙÖ±ÏßÔ˶¯Ö±µ½Åöµ½BʱËٶȼõΪ0¡£
ËùÒÔAÒƶ¯µÄ¾àÀë
£¬
ÒòΪ
£¬
ËùÒÔ
¢Ú
ÁªÁ¢¢ÙºÍ¢ÚÁ½Ê½½âµÃ£º
ËùÒÔ
¡£
¡¾ÌâÄ¿¡¿ÔÚ¡°Ì½¾¿µ¯Á¦Ó뵯»ÉÉ쳤Á¿µÄ¹Øϵ¡±µÄʵÑéÖУ¬Ä³ÊµÑéС×齫²»Í¬ÊýÁ¿µÄ¹³Âë·Ö±ð¹ÒÔÚÊúÖ±µ¯»É϶ˣ¬ÊµÑé×°ÖÃÈçͼ¼×Ëùʾ£¬²âµÃʵÑéÊý¾ÝÈçÏÂ±í£º
µ¯Á¦/N | 0.50 | 1.00 | 1.50 | 2.00 | 2.50 | 3.00 | 3.50 |
É쳤Á¿x/£¨¡Á10-2m£© | 0.74 | 1.80 | 2.80 | 3.72 | 4.60 | 5.58 | 6.42 |
(1)¸ù¾Ý±íÖÐÊý¾ÝÔÚͼÒÒÖÐ×÷³öF¡ªxͼÏñ_______£¬²¢ÇóµÃ¸Ãµ¯»ÉµÄ¾¢¶ÈϵÊýk=___________N/m£¨±£ÁôÁ½Î»ÓÐЧÊý×Ö£©¡£
(2)¹ØÓÚʵÑé×¢ÒâÊÂÏÒÔÏÂ˵·¨´íÎóµÄÊÇ_____
A.Ðü¹Ò¹³Âëºó£¬ÐëÔÚ¹³Âë¾²Ö¹ºóÔÙ¶ÁÊý
B.ʵÑéÖУ¬¿Ì¶È³ß¿ÉÒÔÇãб·ÅÖÃ
C.µ¯»ÉµÄÊÜÁ¦²»Äܳ¬¹ýËüµÄµ¯ÐÔÏÞ¶È