ÌâÄ¿ÄÚÈÝ

ÔÚ²âÁ¿µçÔ´µÄµç¶¯ÊƺÍÄÚ×èµÄʵÑéÖУ¬ÓÉÓÚËùÓõĵçѹ±í£¨ÊÓΪÀíÏëµçѹ±í£©µÄÁ¿³Ì½ÏС£¬Ä³Í¬Ñ§Éè¼ÆÁËÈçͼËùʾµÄʵÎïµç·¡£

¢ÙʵÑéʱ£¬Ó¦ÏȽ«µç×èÏäµÄµç×èµ÷µ½         ¡££¨Ñ¡Ìî¡°×î´óÖµ¡±¡¢¡°×îСֵ¡±»ò¡°ÈÎÒâÖµ¡±£©

¢Ú¸Ä±äµç×èÏäµÄ×èÖµR£¬·Ö±ð²â³ö×èÖµR0= 10¦¸µÄ¶¨Öµµç×èÁ½¶ËµÄµçѹU£¬ÏÂÁÐÁ½×éRµÄÈ¡Öµ·½°¸ÖУ¬±È½ÏºÏÀíµÄ·½°¸ÊÇ            ¡££¨Ñ¡Ìîl»ò2£©

¢Û¸ù¾ÝʵÑéÊý¾ÝÃèµã£¬»æ³öµÄͼÏñÊÇÒ»ÌõÖ±Ïß¡£ÈôÖ±ÏßµÄбÂÊΪk£¬ÔÚ×ø±êÖáÉÏ

µÄ½Ø¾àΪb£¬Ôò¸ÃµçÔ´µÄµç¶¯ÊÆE=____£¬ÄÚ×èr=____£¨ÓÃk¡¢bºÍR0±íʾ£©¡£

¢Ù×î´óÖµ   ¢Ú2   ¢Û£»£¨¢Ù¢Úÿ¿Õ¾ù2·Ö£¬¢Ûÿ¿Õ¾ù3·Ö£©

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
£¨1£©ÔÚÀûÓÃÖØ´¸ÏÂÂäÑéÖ¤»úеÄÜÊغ㶨ÂɵÄʵÑéÖУº

¢ÙÏÂÃæÐðÊöÕýÈ·µÄÊÇ
BD
BD
£®
A¡¢Ó¦¸ÃÓÃÌìƽ³Æ³öÎïÌåµÄÖÊÁ¿£®
B¡¢Ó¦¸ÃÑ¡Óõ㼣ÇåÎú£¬µÚÒ»¡¢¶þÁ½µã¼äµÄ¾àÀë½Ó½ü2mmµÄÖ½´ø£®
C¡¢²Ù×÷ʱӦÏÈ·ÅÖ½´øÔÙͨµç£®
D¡¢´òµã¼ÆʱÆ÷Ó¦½ÓÔÚµçѹΪ4¡«6VµÄ½»Á÷µçÔ´ÉÏ£®
¢ÚÓÐÏÂÁÐÆ÷²Ä¿É¹©Ñ¡ÓãºÌú¼Ų̈£¬´òµã¼ÆʱÆ÷£¬¸´Ð´Ö½£¬Ö½´ø£¬ÖØ´¸£¬µÍѹ½»Á÷µçÔ´£¬µ¼Ïߣ¬µç¼ü£¬Ììƽ£®ÆäÖв»±ØÒªµÄÆ÷²ÄÓÐ
Ììƽ
Ììƽ
£»È±ÉÙµÄÆ÷²ÄÊÇ
¿Ì¶È³ß
¿Ì¶È³ß
£®
¢ÛʵÑéÖÐÓôòµã¼ÆʱÆ÷´ò³öµÄÖ½´øÈçͼËùʾ£¬ÆäÖУ¬AΪ´òϵĵÚ1¸öµã£¬C¡¢D¡¢E¡¢FΪ¾àA½ÏÔ¶µÄÁ¬ÐøÑ¡È¡µÄËĸöµã£¨ÆäËûµãδ±ê³ö£©£®C¡¢D¡¢E¡¢Fµ½AµÄ¾àÀë·Ö±ðΪs1£¬s2£¬s3£¬s4£¬ÖØ´¸µÄÖÊÁ¿Îªm£¬µçÔ´µÄƵÂÊΪf£¬ÊµÑéµØµãµÄÖØÁ¦¼ÓËÙ¶ÈΪg£®¸ù¾ÝÒÔÉÏÌõ¼þд³ö£º´òÏÂDµãʱÖØ´¸Ëٶȱí´ïʽv=
1
2
f£¨
S
 
3
-
S
 
1
£©
1
2
f£¨
S
 
3
-
S
 
1
£©
£¬ÖØ´¸ÖØÁ¦ÊÆÄܼõÉÙÁ¿±í´ïʽ¡÷Ep=
mg
S
 
2
mg
S
 
2
£¬ÖØ´¸¶¯ÄÜÔö¼ÓÁ¿±í´ïʽ¡÷Ex=
1
8
m
f
2
 
(S
 
3
-S
 
1
)
2
 
1
8
m
f
2
 
(S
 
3
-S
 
1
)
2
 
£® £¨ÓÃs1£¬s2£¬s3£¬s4£¬m£¬f£¬gµÈ×Öĸ±í´ï£©
£¨2£©ÔÚ²âÁ¿µçÔ´µÄµç¶¯ÊƺÍÄÚ×èµÄʵÑéÖУ¬ÓÉÓÚËùÓõĵçѹ±í£¨ÊÓΪÀíÏëµçѹ±í£©µÄÁ¿³Ì½ÏС£¬Ä³Í¬Ñ§Éè¼ÆÁËÈçͼËùʾµÄʵÎïµç·£®
¢ÙÊÔÑéʱ£¬Ó¦ÏȽ«µç×èÏäµÄµç×èµ÷µ½
×î´óÖµ
×î´óÖµ
£®£¨Ñ¡Ìî¡°×î´óÖµ¡±¡¢¡°×îСֵ¡±»ò¡°ÈÎÒâÖµ¡±£©
¢Ú¸Ä±äµç×èÏäµÄ×èÖµR£¬·Ö±ð²â³ö×èÖµR0=10¦¸µÄ¶¨Öµµç×èÁ½¶ËµÄµçѹU£¬ÏÂÁÐÁ½×éRµÄÈ¡Öµ·½°¸ÖУ¬±È½ÏºÏÀíµÄ·½°¸ÊÇ
2
2
£®£¨Ñ¡Ìî¡°1¡±»ò¡°2¡±£©
·½°¸±àºÅ µç×èÏäµÄ×èÖµR/¦¸
1 400.0 350.0 300.0 250.0 200.0
2 80.0 70.0 60.0 50.0 40.0
¢Û¸ù¾ÝʵÑéÊý¾ÝÃèµã£¬»æ³öµÄ
1
U
-RͼÏóÊÇÒ»ÌõÖ±Ïߣ®ÈôÖ±ÏßµÄбÂÊΪk£¬ÔÚ
1
U
×ø±êÖáÉϵĽؾàΪb£¬Ôò¸ÃµçÔ´µÄµç¶¯ÊÆE=
1
kR
 
0
1
kR
 
0
£¬ÄÚ×èr=
b
k
-R
 
0
b
k
-R
 
0
£¨ÓÃk¡¢bºÍR0±íʾ£©

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø