ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Ä³¿Æ¼¼Ð¡×éÏë²â¶¨µ¯»ÉÍÐÅ̳ÓÄÚ²¿µ¯»ÉµÄ¾¢¶ÈϵÊýk£¬²ð¿ª·¢ÏÖÆäÄÚ²¿¼òÒ׽ṹÈçͼ(a)Ëùʾ£¬ÍÐÅÌA¡¢ÊúÖ±¸ËB¡¢Ë®Æ½ºá¸ËHÓë³ÝÌõC¹Ì¶¨Á¬ÔÚÒ»Æ𣬳ÝÂÖDÓë³ÝÌõCÄöºÏ£¬ÔÚ³ÝÂÖÉϹ̶¨Ö¸Ê¾Ê¾ÊýµÄÖ¸ÕëE£¬Á½¸ùÍêÈ«ÏàͬµÄµ¯»É½«ºá¸ËµõÔÚ³ÓµÄÍâ¿ÇIÉÏ¡£ÍÐÅÌÖв»·ÅÎïƷʱ£¬Ö¸ÕëEÇ¡ºÃÖ¸ÔÚÊúÖ±ÏòÉϵÄλÖá£Ö¸ÕëËæ³ÝÂÖת¶¯Ò»Öܺó¿Ì¶ÈÅ̵ÄʾÊýΪP0£½5 kg¡£
¿Æ¼¼Ð¡×éÉè¼ÆÁËÏÂÁвÙ×÷£º
A£®ÔÚÍÐÅÌÖзÅÉÏÒ»ÎïÆ·£¬¶Á³öÍÐÅ̳ӵÄʾÊýP1£¬²¢²â³ö´Ëʱµ¯»ÉµÄ³¤¶Èl1£»
B£®ÓÃÓα꿨³ß²â³ö³ÝÂÖDµÄÖ±¾¶d£»
C£®ÍÐÅÌÖв»·ÅÎïÆ·£¬²â³ö´Ëʱµ¯»ÉµÄ³¤¶Èl0£»
D£®¸ù¾Ý²âÁ¿½á¹û¡¢Ìâ¸øÌõ¼þ¼°ºú¿Ë¶¨ÂɼÆË㵯»ÉµÄ¾¢¶ÈϵÊýk£»
E£®ÔÚÍÐÅÌÖÐÔö¼ÓÒ»ÏàͬµÄÎïÆ·£¬¶Á³öÍÐÅ̳ӵÄʾÊýP2£¬²¢²â³ö´Ëʱµ¯»ÉµÄ³¤¶Èl2£»
F£®ÔÙ´ÎÔÚÍÐÅÌÖÐÔö¼ÓÒ»ÏàͬµÄÎïÆ·£¬¶Á³öÍÐÅ̳ӵÄʾÊýP3£¬²¢²â³ö´Ëʱµ¯»ÉµÄ³¤¶Èl3£»
G£®Êý³ö³ÝÂֵijÝÊýn£»
H£®Êý³ö³ÝÌõµÄ³ÝÊýN²¢²â³ö³ÝÌõµÄ³¤¶Èl¡£
(1)С×éͬѧ¾¹ýÌÖÂ۵óöÒ»ÖÖ·½°¸µÄ²Ù×÷˳Ðò£¬¼´a·½°¸£º²ÉÓÃBD²½Öè¡£
¢ÙÓÃËù²âµÃµÄÏà¹ØÁ¿µÄ·ûºÅ±íʾµ¯»ÉµÄ¾¢¶ÈϵÊýk£¬Ôòk£½________¡£
¢ÚijͬѧÔÚʵÑéÖÐÖ»²âµÃ³ÝÂÖÖ±¾¶£¬Èçͼ(b)Ëùʾ£¬²¢²é×ÊÁϵÃÖªµ±µØµÄÖØÁ¦¼ÓËÙ¶Èg£½9.80 m/s2£¬Ôòµ¯»ÉµÄ¾¢¶ÈϵÊýk£½________¡£(½á¹û±£ÁôÈýλÓÐЧÊý×Ö)
(2)ÇëÄã¸ù¾Ý¿Æ¼¼Ð¡×éÌṩµÄ²Ù×÷£¬Éè¼Æb·½°¸£º²ÉÓãº________²½Ö裻ÓÃËù²âµÃµÄÏà¹ØÁ¿µÄ·ûºÅ±íʾµ¯»ÉµÄ¾¢¶ÈϵÊýk£¬Ôòk£½________¡£
¡¾´ð°¸¡¿ 7.96¡Á102 N/m CAEFD
¡¾½âÎö¡¿
(1)[1]¢Ùµ¯»ÉµÄÉ쳤Á¿Óë³ÝÌõϽµµÄ¾àÀëÏàµÈ£¬¶ø³ÝÌõϽµµÄ¾àÀëÓë³ÝÂÖת¹ýµÄ½Ç¶È¶ÔÓ¦µÄ»¡³¤ÏàµÈ£¬³ÝÂÖת¶¯Ò»ÖܶÔÓ¦µÄ»¡³¤¼´Îª³ÝÂÖÖܳ¤£¬¼´ÍÐÅÌÖÐÎïÆ·ÖÊÁ¿ÎªP0£½5 kgʱµ¯»ÉµÄÉ쳤Á¿£º
¦¤x£½¦Ðd
Òò´ËÖ»Òª²â³ö³ÝÂÖµÄÖ±¾¶d¼´¿É¼ÆËãÆäÖܳ¤£¬È»ºóÓɺú¿Ë¶¨Âɵãº
2k¦¤x£½P0g
½âµÃk£½£»
[2]¢ÚÓα꿨³ß¶ÁÊýΪ0.980 cm£¬´úÈ룺
k£½
µÃk£½7.96¡Á102 N/m£»
(2)[3]Ö±½Ó²â³ö²»Í¬Ê¾Êýϵ¯»ÉµÄÉ쳤Á¿Ò²¿ÉÒÔ½øÐÐʵÑ飬¼´°´CAEFD½øÐвÙ×÷£¬ÊµÑé²»ÐèÒª²âÁ¿³ÝÂֺͳÝÌõµÄ³ÝÊý£¬GHÊǶàÓàµÄ£»
[4]Çó½âÐαäÁ¿
¦¤x1£½l1£l0
¦¤x2£½l2£l0
¦¤x3£½l3£l0
Ôò£º
k1£½
k2£½
k3£½
Ôò£º
k£½
ÁªÁ¢½âµÃ£ºk£½¡£
¡¾ÌâÄ¿¡¿Ä³Í¬Ñ§ÓÃͼ£¨a£©ËùʾµÄ×°ÖòâÁ¿Ä¾¿éÓëľ°åÖ®¼äµÄ¶¯Ä¦²ÁÒòÊý¡£¿ç¹ý¹â»¬¶¨»¬ÂÖµÄϸÏßÁ½¶Ë·Ö±ðÓëľ¿éºÍµ¯»É²âÁ¦¼ÆÏàÁ¬£¬»¬ÂÖºÍľ¿é¼äµÄϸÏß±£³Öˮƽ£¬ÔÚľ¿éÉÏ·½·ÅÖÃíÀÂ뻺ÂýÏò×óÀ¶¯Ë®Æ½·ÅÖõÄľ°å£¬µ±Ä¾¿éºÍíÀÂëÏà¶Ô×ÀÃæ¾²Ö¹ÇÒľ°åÈÔÔÚ¼ÌÐø»¬¶¯Ê±£¬µ¯»É²âÁ¦¼ÆµÄʾÊý¼´ÎªÄ¾¿éÊܵ½µÄ»¬¶¯Ä¦²ÁÁ¦µÄ´óС¡£Ä³´ÎʵÑéËùµÃÊý¾ÝÒÑÔÚϱíÖиø³ö£¬ÆäÖеÄÖµ¿É´Óͼ£¨b£©Öе¯»É²âÁ¦¼ÆµÄʾÊý¶Á³ö¡£
íÀÂëµÄÖÊÁ¿ | 0.05 | 0.10 | 0.15 | 0.20 | 0.25 |
»¬¶¯Ä¦²ÁÁ¦ | 2.15 | 2.36 | 2.55 | 2.93 |
»Ø´ðÏÂÁÐÎÊÌ⣺
£¨1£©=__________£º
£¨2£©ÔÚͼ£¨c£©µÄ×ø±êÖ½Éϲ¹Æëδ»³öµÄÊý¾Ýµã²¢»æ³öͼÏß____________£»
£¨3£©Ó롢ľ¿éÖÊÁ¿¡¢Ä¾°åÓëľ¿éÖ®¼äµÄ¶¯Ä¦²ÁÒòÊý¼°ÖØÁ¦¼ÓËٶȴóС֮¼äµÄ¹ØϵʽΪ=__________£¬Í¼Ïߣ¨Ö±Ïߣ©µÄбÂʵıí´ïʽΪ=__________¡£
£¨4£©È¡£¬ÓÉ»æ³öµÄͼÏßÇóµÃ_____¡££¨±£Áô2λÓÐЧÊý×Ö£©