ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÒÔÏÂÊÇһλͬѧ×ö¡°Ì½¾¿ÐαäÓ뵯Á¦µÄ¹Øϵ¡±µÄʵÑé¡£
£¨1£©ÏÂÁеÄʵÑé²½ÖèÊÇÕâλͬѧ׼±¸Íê³ÉµÄ£¬ÇëÄã°ïÕâλͬѧ°´²Ù×÷µÄÏȺó˳Ðò£¬ÓÃ×ÖĸÅÅÁгöÀ´ÊÇ£º ¡£
A£®ÒÔµ¯»ÉÉ쳤Á¿Îªºá×ø±ê£¬ÒÔµ¯Á¦Îª×Ý×ø±ê£¬Ãè³ö¸÷×éÊý¾Ý£¨x£¬F£©¶ÔÓ¦µÄµã£¬²¢ÓÃƽ»¬µÄÇúÏßÁ¬½áÆðÀ´¡£ |
B£®¼Çϵ¯»É²»¹Ò¹³Âëʱ£¬Æä϶ËÔڿ̶ȳßÉϵĿ̶ÈL0 |
C£®½«Ìú¼Ų̈¹Ì¶¨ÓÚ×À×ÓÉÏ£¬²¢½«µ¯»ÉµÄÒ»¶ËϵÓÚºáÁºÉÏ£¬ÔÚµ¯»É¸½½üÊúÖ±¹Ì¶¨Ò»¿Ì¶È³ß |
D£®ÒÀ´ÎÔÚµ¯»É϶˹ÒÉÏ1¸ö¡¢2¸ö¡¢3¸ö¡¢4¸ö¡¡¹³Â룬²¢·Ö±ð¼ÇϹ³Â뾲ֹʱ£¬µ¯»É϶ËËù¶ÔÓ¦µÄ¿Ì¶È²¢¼Ç¼ÔÚ±í¸ñÄÚ£¬È»ºóȡϹ³Âë |
E¡¢ÒÔµ¯»ÉÉ쳤Á¿Îª×Ô±äÁ¿£¬Ð´³öµ¯Á¦Ó뵯»ÉÉ쳤Á¿µÄ¹Øϵʽ.
F¡¢½âÊͺ¯Êý±í´ïʽÖг£ÊýµÄÎïÀíÒâÒå.
£¨2£©Ï±íÊÇÕâλͬѧ̽¾¿µ¯Á¦´óСÓ뵯»ÉÉ쳤Á¿Ö®¼äµÄ¹ØϵËù²âµÄ¼¸×éÊý¾Ý£º
µ¯Á¦£¨F/N£© | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 |
µ¯»ÉÔÀ´³¤¶È£¨L0/cm£© | 15 | 15 | 15 | 15 | 15 |
µ¯»ÉºóÀ´³¤¶È£¨L/cm£© | 16.0 | 17.1 | 18.0 | 18.9 | 20 |
µ¯»ÉÉ쳤Á¿£¨x/cm£© | 1.0 | 2.1 | 3.0 | 3.9 | 5.0 |
¾ÝÉϱíµÄÊý¾ÝÔÚÓÒÏÂͼµÄ×ø±êÖÐ×÷³öF-xͼÏß¡£
¢Úд³öÇúÏߵĺ¯Êý±í´ïʽ¡££¨xÓÃcm×÷µ¥Î»£©£º
¢Ûº¯Êý±í´ïʽÖг£ÊýµÄÎïÀíÒâÒ壺
¡¾´ð°¸¡¿£¨1£©C B D A E F
£¨2£©¢Ù
¢ÚF = 0.5x
¢Û±íʾʹµ¯»ÉÿÉ쳤»òѹËõ0.01m£¨1cm£©ËùÐèµÄÀÁ¦£¬´óСΪ0.5N
¡¾½âÎö¡¿
£¨1£©ÏÈ×é×°Æ÷²Ä£¬¼´CB£¬È»ºó½øÐÐʵÑ飬¼´D£¬×îºóÊý¾Ý´¦Àí£¬¼´AEF£®ËùÒÔÏȺó˳ÐòΪCBDAEF£®
£¨2£©¢ÙͼÏßÈçͼËùʾ£®
¢Ú¸ù¾ÝͼÏ󣬸ÃÖ±ÏßΪ¹ýÔµãµÄÒ»ÌõÖ±Ïߣ¬¼´µ¯Á¦ÓëÉ쳤Á¿³ÉÕý±È£¬Í¼ÏóµÄбÂʱíʾµ¯»ÉµÄ¾¢¶ÈϵÊý
¹Êº¯Êý±í´ïʽΪ£ºF=0.43x
¢Ûº¯Êý±í´ïʽÖеij£ÊýΪµ¯»ÉµÄ¾¢¶ÈϵÊý£¬±íʾʹµ¯»ÉÿÉ쳤»òѹËõ0.01 m(1 cm)ËùÐèµÄÀÁ¦»òѹÁ¦´óСΪ0.43 N£»