ÈçͼËùʾ£¬ÓÐÒ»ÓëÊúÖ±·½Ïò¼Ð½ÇΪ45¡ãµÄÖ±Ï߽߱磬Æä×óÏ·½ÓÐÒ»Õý½»µÄÔÈÇ¿µç´Å³¡£¬´Å³¡·½Ïò´¹Ö±ÓÚÖ½ÃæÏòÀ´Å¸ÐӦǿ¶ÈB=
5
3
T£»µç³¡·½ÏòÊúÖ±ÏòÉÏ£¬³¡Ç¿E=
mg
q
=10N/C
£¬Ò»ÖÊÁ¿Îªm=2¡Á10-5kg£¬µçºÉÁ¿q=+2¡Á10-5CµÄСÇò´Ó±ß½çÉÏNµãÕýÉÏ·½¸ßΪh=0.2m´¦µÄMµã¾²Ö¹ÊÍ·Å£¬ÏÂÂäµ½NµãʱСÇò˲¼ä±¬Õ¨³ÉÖÊÁ¿¡¢µçºÉÁ¿¾ùÏàµÈµÄA¡¢BÁ½¿é£¬ÒÑÖª±¬Õ¨ºóAÏòÉÏÔ˶¯£¬ÄÜ´ïµ½µÄ×î´ó¸ß¶ÈΪ4h£»BÏòÏÂÔ˶¯½øÈëµç´Å³¡ÇøÓò£¬´ËºóAÒ²½«½øÈëµç´Å³¡ÇøÓò£®g=10m/s2
Çó£º
£¨1£©B¸Õ½øÈëµç´Å³¡ÇøÓòµÄËÙ¶Èv1£¿
£¨2£©BµÚ¶þ´Î½øÈëµç´Å³¡ÇøÓòµÄËÙ¶Èv2£¿
£¨3£©ÉèB¡¢AµÚ¶þ´Î½øÈëµç´Å³¡Ê±£¬Óë±ß½çOO'½»µã·Ö±ðΪP¡¢Q£¬ÇóPQÖ®¼äµÄ¾àÀ룮
·ÖÎö£º£¨1£©¸ù¾Ý¶¯Äܶ¨Àí£¬½áºÏ¶¯Á¿Êغ㶨ÂÉÇó³öB¸Õ½øÈëµç´Å³¡ÇøÓòµÄËٶȣ®
£¨2£©B½øÈëµç´Å³¡£¬Êܵ½µÄµç³¡Á¦ºÍÖØÁ¦ÏàµÈ£¬×öÔÈËÙÔ²ÖÜÔ˶¯£¬¸ù¾Ý¼¸ºÎ¹Øϵ£¬µÃ³öB³ö´Å³¡ºóµÄËٶȷ½Ïò£¬´Ó¶øÈ·¶¨ÆäÔ˶¯Çé¿ö£¬´Ó¶ø¸ù¾ÝÔ˶¯·ÖÎöµÃ³öµÚ¶þ´Î½øÈëµç´Å³¡µÄËٶȣ®
£¨3£©¸ù¾ÝÔ²ÖÜÔ˶¯µÄ֪ʶ£¬½áºÏ¹ìµÀ°ë¾¶£¬ÔËÓü¸ºÎ¹Øϵ·Ö±ðÇó³öA¡¢BµÚ¶þ´Î½øÈëµç´Å³¡ÓëµÚÒ»´Î½øÈëµç´Å³¡Ö®¼äµÄ¾àÀ룬´Ó¶øÇó³öPQÖ®¼äµÄ¾àÀ룮
½â´ð£º½â£º£¨1£©¸ù¾Ý¶¯Äܶ¨ÀíµÃ£¬mgh=
1
2
mv02

½âµÃv0=
2gh
£®
¹æ¶¨ÏòÏÂΪÕý·½Ïò£¬
±¬Õ¨µÄ˲¼äϵͳ¶¯Á¿Êغ㣬mv0=
1
2
mvA1+
1
2
mvB1

±¬Õ¨ºóAÏòÉÏÔ˶¯£¬ÄÜÉÏÉýµÄ×î´ó¸ß¶ÈΪ4h£¬ÔòvA1=-
8gh
£®
B¸Õ½øÈëµç´Å³¡ÇøÓòµÄËÙ¶Èv1=vB1=8m/s£®
£¨2£©¶ÔB£º½øÈë´Å³¡ºó£¬ÓÉÓÚqE=mg£¬ËùÒÔ×öÔÈËÙÔ²ÖÜÔ˶¯£®
Óɼ¸ºÎ¹Øϵ֪£¬BÀ뿪µç´Å³¡×öƽÅ×Ô˶¯£®
s=v1
h=
1
2
gt2

tan45¡ã=
s
h

½âµÃ£ºt=
2v1
g
=1.6s
£®
BµÚ¶þ´Î½øÈëµç´Å³¡ÇøÓò£ºv2=
v12+(gt)2
=8
5
m/s

·½ÏòÓëˮƽ·½ÏòµÄ¼Ð½Çtan¦Á=2£®
£¨3£©¶ÔB£ºµÚÒ»´Î½øÈëµç´Å³¡×öÔÈËÙÔ²ÖÜÔ˶¯£®
1
2
qv1B=
mv12
2RB
£¬½âµÃ£ºRB=
mv1
qB
£®
BµÚ¶þ´Î½øÈëµç´Å³¡ÓëµÚÒ»´Î½øÈëµç´Å³¡µÄ¾àÀëNP£®
NP=NC+CP=
2
RB+
2
S
£®
ͬÀí£¬AµÚ¶þ´Î½øÈëµç´Å³¡ÓëµÚÒ»´Î½øÈëµç´Å³¡µÄ¾àÀëΪNQ£®
NQ=ND+DQ=
2
RA+
2
S
1£®
PQ=
2
(RB-RA+S-S1)
=
2
(
mv1
qB
-
mvA1
qB
+
2v12
g
-
2vA12
g
)
=12
2
m
£®
´ð£º£¨1£©B¸Õ½øÈëµç´Å³¡ÇøÓòµÄËÙ¶ÈΪ8m/s£®
£¨2£©BµÚ¶þ´Î½øÈëµç´Å³¡ÇøÓòµÄËÙ¶ÈΪ8
5
m/s
£®
£¨3£©PQÖ®¼äµÄ¾àÀëΪ12
2
m£®
µãÆÀ£º±¾Ìâ×ÛºÏÔËÓÃÁ˶¯Äܶ¨Àí¡¢¶¯Á¿Êغ㶨ÂÉ¡¢Å£¶ÙµÚ¶þ¶¨ÂÉ£¬×ÛºÏÐÔ½ÏÇ¿£¬¶ÔÊýѧ¼¸ºÎÄÜÁ¦µÄÒªÇó½Ï¸ß£¬¹Ø¼ü¸ãÇåA¡¢BµÄÔ˶¯Çé¿ö£¬Ñ¡ÔñºÏÊʵĹæÂɽøÐÐÇó½â£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2009?»ÆÖÝÇøÄ£Ä⣩ÈçͼËùʾ£¬ÓÐÒ»ÓëÊúÖ±·½Ïò¼Ð½ÇΪ45¡ãµÄÖ±Ï߽߱磬Æä×óÏ·½ÓÐÒ»Õý½»µÄÔÈÇ¿µç´Å³¡£®´Å³¡·½Ïò´¹Ö±ÓÚÖ½ÃæÏòÀ´Å¸ÐӦǿ¶È´óСΪB£»µç³¡·½ÏòÊúÖ±ÏòÉÏ£¬³¡Ç¿´óСΪE=mg/q£®Ò»ÖÊÁ¿Îªm£¬µçºÉÁ¿Îª+qµÄСÇò´Ó±ß½çÉÏNµãÕýÉÏ·½¸ßΪh´¦µÄMµã¾²Ö¹ÊÍ·Å£¬ÏÂÂäµ½NµãʱСÇò˲¼ä±¬Õ¨³ÉÖÊÁ¿¡¢µçºÉÁ¿¾ùÏàµÈµÄA¡¢BÁ½¿é£®ÒÑÖª±¬Õ¨ºóAÏòÉÏÔ˶¯£¬ÄÜ´ïµ½µÄ×î´ó¸ß¶ÈΪ4h£»BÏòÏÂÔ˶¯½øÈëµç´Å³¡ÇøÓò£®´ËºóAÒ²½«½øÈëµç´Å³¡ÇøÓò£¬Çó£º
£¨1£©B¸Õ½øÈëµç´Å³¡ÇøÓòµÄËÙ¶ÈvB1£»
£¨2£©BµÚ¶þ´Î½øÈëµç´Å³¡ÇøÓòµÄËÙ¶ÈvB2£»
£¨3£©ÉèB¡¢AµÚ¶þ´Î½øÈëµç´Å³¡Ê±£¬Óë±ß½çOO'½»µã·Ö±ðΪP¡¢Q£¬ÇóPQÖ®¼äµÄ¾àÀ룮

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨16·Ö£©ÈçͼËùʾ£¬ÓÐÒ»ÓëÊúÖ±·½Ïò¼Ð½ÇΪ45¡ãµÄÖ±Ï߽߱磬Æä×óÏ·½ÓÐÒ»Õý½»µÄÔÈÇ¿µç´Å³¡£¬´Å³¡·½Ïò´¹Ö±ÓÚÖ½ÃæÏòÀ´Å¸ÐӦǿ¶ÈB=5/3T£»µç³¡·½ÏòÊúÖ±ÏòÉÏ£¬³¡Ç¿E=mg/q=10N/C£¬Ò»ÖÊÁ¿Îªm=2¡Á10-5kg£¬µçºÉÁ¿q=+2¡Á10-5CµÄСÇò´Ó±ß½çÉÏNµãÕýÉÏ·½¸ßΪh=0£®2m´¦µÄMµã¾²Ö¹ÊÍ·Å£¬ÏÂÂäµ½NµãʱСÇò˲¼ä±¬Õ¨³ÉÖÊÁ¿¡¢µçºÉÁ¿¾ùÏàµÈµÄA¡¢BÁ½¿é£¬ÒÑÖª±¬Õ¨ºóAÏòÉÏÔ˶¯£¬ÄÜ´ïµ½µÄ×î´ó¸ß¶ÈΪ4h£»BÏòÏÂÔ˶¯½øÈëµç´Å³¡ÇøÓò£¬´ËºóAÒ²½«½øÈëµç´Å³¡ÇøÓò£®g=10m/s2Çó£º

£¨1£© B¸Õ½øÈëµç´Å³¡ÇøÓòµÄËÙ¶Èv1£¿

£¨2£© BµÚ¶þ´Î½øÈëµç´Å³¡ÇøÓòµÄËÙ¶Èv2£¿

£¨3£©ÉèB¡¢AµÚ¶þ´Î½øÈëµç´Å³¡Ê±£¬Óë±ß½çOO£§½»µã·Ö±ðΪP¡¢Q£¬ÇóPQÖ®¼äµÄ¾àÀ룮

 

 

 

 

 

 

 

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨16·Ö£©ÈçͼËùʾ£¬ÓÐÒ»ÓëÊúÖ±·½Ïò¼Ð½ÇΪ45¡ãµÄÖ±Ï߽߱磬Æä×óÏ·½ÓÐÒ»Õý½»µÄÔÈÇ¿µç´Å³¡£¬´Å³¡·½Ïò´¹Ö±ÓÚÖ½ÃæÏòÀ´Å¸ÐӦǿ¶ÈB=5/3T£»µç³¡·½ÏòÊúÖ±ÏòÉÏ£¬³¡Ç¿E=mg/q=10N/C£¬Ò»ÖÊÁ¿Îªm=2¡Á10-5kg£¬µçºÉÁ¿q=+2¡Á10-5CµÄСÇò´Ó±ß½çÉÏNµãÕýÉÏ·½¸ßΪh=0£®2m´¦µÄMµã¾²Ö¹ÊÍ·Å£¬ÏÂÂäµ½NµãʱСÇò˲¼ä±¬Õ¨³ÉÖÊÁ¿¡¢µçºÉÁ¿¾ùÏàµÈµÄA¡¢BÁ½¿é£¬ÒÑÖª±¬Õ¨ºóAÏòÉÏÔ˶¯£¬ÄÜ´ïµ½µÄ×î´ó¸ß¶ÈΪ4h£»BÏòÏÂÔ˶¯½øÈëµç´Å³¡ÇøÓò£¬´ËºóAÒ²½«½øÈëµç´Å³¡ÇøÓò£®g=10m/s2Çó£º

£¨1£© B¸Õ½øÈëµç´Å³¡ÇøÓòµÄËÙ¶Èv1£¿

£¨2£© BµÚ¶þ´Î½øÈëµç´Å³¡ÇøÓòµÄËÙ¶Èv2£¿

£¨3£©ÉèB¡¢AµÚ¶þ´Î½øÈëµç´Å³¡Ê±£¬Óë±ß½çOO£§½»µã·Ö±ðΪP¡¢Q£¬ÇóPQÖ®¼äµÄ¾àÀ룮

 

 

 

 

 

 

 

 

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2012½ìºÓ±±Ê¡¸ßÈýÉÏѧÆÚµÚ¶þ´ÎÔ¿¼ÎïÀí¾í ÌâÐÍ£ºÑ¡ÔñÌâ

£¨16·Ö£©ÈçͼËùʾ£¬ÓÐÒ»ÓëÊúÖ±·½Ïò¼Ð½ÇΪ45¡ãµÄÖ±Ï߽߱磬Æä×óÏ·½ÓÐÒ»Õý½»µÄÔÈÇ¿µç´Å³¡£¬´Å³¡·½Ïò´¹Ö±ÓÚÖ½ÃæÏòÀ´Å¸ÐӦǿ¶ÈB=5/3T£»µç³¡·½ÏòÊúÖ±ÏòÉÏ£¬³¡Ç¿E=mg/q=10N/C£¬Ò»ÖÊÁ¿Îªm=2¡Á10-5kg£¬µçºÉÁ¿q=+2¡Á10-5CµÄСÇò´Ó±ß½çÉÏNµãÕýÉÏ·½¸ßΪh=0£®2m´¦µÄMµã¾²Ö¹ÊÍ·Å£¬ÏÂÂäµ½NµãʱСÇò˲¼ä±¬Õ¨³ÉÖÊÁ¿¡¢µçºÉÁ¿¾ùÏàµÈµÄA¡¢BÁ½¿é£¬ÒÑÖª±¬Õ¨ºóAÏòÉÏÔ˶¯£¬ÄÜ´ïµ½µÄ×î´ó¸ß¶ÈΪ4h£»BÏòÏÂÔ˶¯½øÈëµç´Å³¡ÇøÓò£¬´ËºóAÒ²½«½øÈëµç´Å³¡ÇøÓò£®g=10m/s2Çó£º

£¨1£© B¸Õ½øÈëµç´Å³¡ÇøÓòµÄËÙ¶Èv1£¿

£¨2£© BµÚ¶þ´Î½øÈëµç´Å³¡ÇøÓòµÄËÙ¶Èv2£¿

£¨3£©ÉèB¡¢AµÚ¶þ´Î½øÈëµç´Å³¡Ê±£¬Óë±ß½çOO£§½»µã·Ö±ðΪP¡¢Q£¬ÇóPQÖ®¼äµÄ¾àÀ룮

 

 

 

 

 

 

 

 

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸