Èçͼ¼×Ëùʾ£¬Ë®Æ½¼ÓËٵ糡µÄ¼ÓËÙµçѹΪU0£¬ÔÚËüµÄÓÒ²àÓÐÓÉˮƽÕý¶Ô·ÅÖõÄƽÐнðÊô°åa¡¢b¹¹³ÉµÄƫתµç³¡£¬ÒÑ֪ƫתµç³¡µÄ°å³¤L=0.10m£¬°å¼ä¾àÀëd=5.0¡Á10-2 m£¬Á½°å¼ä½ÓÓÐÈçͼ15ÒÒËùʾµÄËæʱ¼ä±ä»¯µÄµçѹU£¬ÇÒa°åµçÊƸßÓÚb°åµçÊÆ£®ÔÚ½ðÊô°åÓÒ²à´æÔÚÓнçµÄÔÈÇ¿´Å³¡£¬´Å³¡µÄ×ó±ß½çΪÓë½ðÊô°åÓÒ²àÖغϵÄÊúֱƽÃæMN£¬MNÓÒ²àµÄ´Å³¡·¶Î§×ã¹»´ó£¬´Å¸ÐӦǿ¶ÈB=5.0¡Á10-3T£¬·½ÏòÓëƫתµç³¡Õý½»ÏòÀ´¹Ö±Ö½ÃæÏòÀ£®ÖÊÁ¿ºÍµçºÉÁ¿¶¼ÏàͬµÄ´øÕýµçµÄÁ£×Ó´Ó¾²Ö¹¿ªÊ¼¾­¹ýµçѹU0=50VµÄ¼ÓËٵ糡ºó£¬Á¬ÐøÑØÁ½½ðÊô°å¼äµÄÖÐÏßOO¡ä·½ÏòÉäÈëƫתµç³¡ÖУ¬ÖÐÏßOO¡äÓë´Å³¡±ß½çMN´¹Ö±£®ÒÑÖª´øµçÁ£×ӵıȺÉ
qm
=1.0¡Á108 C/kg£¬²»¼ÆÁ£×ÓËùÊܵÄÖØÁ¦ºÍÁ£×Ó¼äµÄÏ໥×÷ÓÃÁ¦£¬ºöÂÔƫתµç³¡Á½°å¼äµç³¡µÄ±ßԵЧӦ£¬ÔÚÿ¸öÁ£×Óͨ¹ýƫתµç³¡ÇøÓòµÄ¼«¶Ìʱ¼äÄÚ£¬Æ«×ªµç³¡¿ÉÊÓ×÷ºã¶¨²»±ä£®
£¨1£©Çót=0ʱ¿ÌÉäÈëƫתµç³¡µÄÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀ룻
£¨2£©ÇóÁ£×Ó½øÈë´Å³¡Ê±µÄ×î´óËٶȣ»
£¨3£©¶ÔÓÚËùÓнøÈë´Å³¡ÖеÄÁ£×Ó£¬Èç¹ûÒªÔö´óÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀ룬Ӧ¸Ã²ÉÈ¡ÄÄЩ´ëÊ©£¿ÊÔ´ÓÀíÂÛÉÏÍÆÀí˵Ã÷£®
·ÖÎö£º£¨1£©Óɶ¯Äܶ¨Àí¿ÉÒÔÇó³öÁ£×ÓÀ뿪¼ÓËٶȵ糧ʱµÄËٶȣ¬ÓÉÅ£¶ÙµÚ¶þ¶¨ÂÉ¿ÉÒÔÇó³öÁ£×ÓÔڴų¡ÖеĹìµÀ°ë¾¶£¬È»ºóÈ·¶¨Á£×Ó½øÈëÓëÀ뿪´Å³¡µÄ¾àÀ룮
£¨2£©Á£×ÓÔÚƫתµç³¡ÖÐ×öÀàƽÅ×Ô˶¯£¬Ó¦ÓÃƽÅ×Ô˶¯¹æÂÉÓ붯Äܶ¨Àí¿ÉÒÔÇó³öÁ£×ÓµÄ×î´óËٶȣ®
£¨3£©Çó³öÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀë±í´ïʽ£¬È»ºóÕÒ³öÔö´ó¸Ã¾àÀëµÄ´ëÊ©£®
½â´ð£º½â£º£¨1£©Éè¾­¹ý¼ÓËٵ糡¼ÓËÙºó£¬Á£×ÓµÄËÙ¶ÈΪv0£¬
Óɶ¯Äܶ¨ÀíµÃ£ºqU0=
1
2
mv02
£¬
½âµÃ£ºv0=
2qU0
m
=1.0¡Á105m/s£¬
ÓÉÓÚt=0ʱ¿Ìƫתµç³¡µÄ³¡Ç¿ÎªÁ㣬´ËʱÉäÈëƫתµç³¡µÄÁ£×Ó½«ÔÈËÙ´©¹ýµç³¡¶øÒÔv0µÄËٶȴ¹Ö±´Å³¡±ß½ç½øÈë´Å³¡ÖУ¬
Ôڴų¡ÖеÄÔ˶¯¹ì¼£Îª°ëÔ²£®ÉèÁ£×ÓÔڴų¡ÖÐ×öÔÈËÙÔ²ÖÜÔ˶¯µÄ°ë¾¶Îªr£¬
ÓÉÅ£¶ÙµÚ¶þ¶¨Âɵãºqv0B=m
v02
r
£¬½âµÃr=
mv0
qB
£¬
Á£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀëd=2r=0.40m£»
£¨2£©ÉèÁ£×ÓÒÔ×î´óƫתÁ¿À뿪ƫתµç³¡£¬¼´¹ì¼£¾­¹ý½ðÊô°åÓÒ²à±ßÔµ´¦£¬
½øÈë´Å³¡Ê±a¡¢b°åµÄµçѹΪUm£¬ÔòÁ£×Ó½øÈëƫתµç³¡ºó£¬¼ÓËÙ¶Èa=
qUm
m
£¬
ÔÚˮƽ·½Ïò L=v0t£¬ÔÚÊúÖ±·½Ïò y=
1
2
at2£¬
½âµÃUm=
2U0d2
L2
=25v£¼50v
£»
µçѹUm=25Vʱ¶ÔÓ¦Á£×Ó½øÈë´Å³¡µÄËÙ¶È×î´ó£¬
Éè×î´óËٶȴóСΪvm£¬·½ÏòÓëOO¡äµÄ¼Ð½ÇΪq£¬
Ôò¶ÔÓÚÁ£×Óͨ¹ý¼ÓËٵ糡ºÍƫתµç³¡µÄ¹ý³Ì£¬
Óɶ¯Äܶ¨ÀíµÃ£ºqU0+q=
1
2
mvm £¬
½âµÃvm=
2qU0
m
+
qUm
m
=
5
2
¡Á105m/s=1.1¡Á105m/s£¬
tan¦È=
vy
v0
=
1
2
£¬¼´¦È=arctan
1
2
£¬
£¨»òcos¦È=
v0
vm
=
2
5
5
£¬¼´¦È=arccos
2
5
5
£©
£¨3£©ÉèÈÎÒâʱ¿Ì½øÈë´Å³¡µÄÁ£×Ó£¬Æä½øÈë´Å³¡Ê±Ëٶȷ½ÏòÓëOO¡äµÄ¼Ð½ÇΪ¦Á£¬
ÔòÆäËٶȴóС v=
v0
cos¦Á
£¬
Á£×ÓÔڴų¡ÖÐ×öÔ²ÖÜÔ˶¯µÄ¹ì¼£°ë¾¶  R=
mv
qB
=
mv0
qBcos¦Á
£¬
ÓÉÈçͼ´ð-3ËùʾµÄ¼¸ºÎ¹Øϵ¿ÉÖª£¬Á£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀë
  x=2Rcos¦Á=
2mv0
qB
=
2
B
2mU0
q
£¬
ËùÒÔÒªÔö´óÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀëx£¬Ó¦¸Ã¼õСÔÈÇ¿´Å³¡µÄ´Å¸ÐӦǿ¶ÈB£¬»òÔö´ó¼ÓËÙµçѹU0£»
´ð£º£¨1£©t=0ʱ¿ÌÉäÈëƫתµç³¡µÄÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀëΪ0.4m£®
£¨2£©Á£×Ó½øÈë´Å³¡Ê±µÄ×î´óËÙ¶ÈΪ1.1¡Á105m/s£®
£¨3£©Ôö´óÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀëx£¬Ó¦¸Ã¼õСÔÈÇ¿´Å³¡µÄ´Å¸ÐӦǿ¶ÈB£¬»òÔö´ó¼ÓËÙµçѹU0£®
µãÆÀ£ºÓ¦Óö¯Äܶ¨Àí¡¢ÀàƽÅ×Ô˶¯µÄ֪ʶ¡¢Å£¶Ù¶¨Âɼ´¿ÉÕýÈ·½âÌ⣻±¾ÌâÄѶȽϴó£¬ÊÇÒ»µÀÄÑÌ⣮
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

Èçͼ¼×Ëùʾ£¬Ë®Æ½¼ÓËٵ糡µÄ¼ÓËÙµçѹΪU0£¬ÔÚËüµÄÓÒ²àÓÐÓÉˮƽÕý¶Ô·ÅÖõÄƽÐнðÊô°åa¡¢b¹¹³ÉµÄƫתµç³¡£¬ÒÑ֪ƫתµç³¡µÄ°å³¤L=0.10 m£¬°å¼ä¾àÀëd=5.0¡Á10-2 m£¬Á½°å¼ä½ÓÓÐÈçͼ15ÒÒËùʾµÄËæʱ¼ä±ä»¯µÄµçѹU£¬ÇÒa°åµçÊƸßÓÚb°åµçÊÆ¡£ÔÚ½ðÊô°åÓÒ²à´æÔÚÓнçµÄÔÈÇ¿´Å³¡£¬´Å³¡µÄ×ó±ß½çΪÓë½ðÊô°åÓÒ²àÖغϵÄÊúֱƽÃæMN£¬MNÓÒ²àµÄ´Å³¡·¶Î§×ã¹»´ó£¬´Å¸ÐӦǿ¶ÈB=5.0¡Á10-3T£¬·½ÏòÓëƫתµç³¡Õý½»ÏòÀ´¹Ö±Ö½ÃæÏòÀ¡£ÖÊÁ¿ºÍµçºÉÁ¿¶¼ÏàͬµÄ´øÕýµçµÄÁ£×Ó´Ó¾²Ö¹¿ªÊ¼¾­¹ýµçѹU0=50VµÄ¼ÓËٵ糡ºó£¬Á¬ÐøÑØÁ½½ðÊô°å¼äµÄÖÐÏßOO¡ä·½ÏòÉäÈëƫתµç³¡ÖУ¬ÖÐÏßOO¡äÓë´Å³¡±ß½çMN´¹Ö±¡£ÒÑÖª´øµçÁ£×ӵıȺÉ=1.0¡Á108 C/kg£¬²»¼ÆÁ£×ÓËùÊܵÄÖØÁ¦ºÍÁ£×Ó¼äµÄÏ໥×÷ÓÃÁ¦£¬ºöÂÔƫתµç³¡Á½°å¼äµç³¡µÄ±ßԵЧӦ£¬ÔÚÿ¸öÁ£×Óͨ¹ýƫתµç³¡ÇøÓòµÄ¼«¶Ìʱ¼äÄÚ£¬Æ«×ªµç³¡¿ÉÊÓ×÷ºã¶¨²»±ä¡£

1.Çót=0ʱ¿ÌÉäÈëƫתµç³¡µÄÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀ룻

2.ÇóÁ£×Ó½øÈë´Å³¡Ê±µÄ×î´óËٶȣ»

3.¶ÔÓÚËùÓнøÈë´Å³¡ÖеÄÁ£×Ó£¬Èç¹ûÒªÔö´óÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀ룬Ӧ¸Ã²ÉÈ¡ÄÄЩ´ëÊ©£¿ÊÔ´ÓÀíÂÛÉÏÍÆÀí˵Ã÷¡£

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2011-2012ѧÄê¶È±±¾©Êк£µíÇø¸ßÈýÉÏѧÆÚÆÚÄ©¿¼ÊÔÎïÀí¾í ÌâÐÍ£º¼ÆËãÌâ

Èçͼ¼×Ëùʾ£¬Ë®Æ½¼ÓËٵ糡µÄ¼ÓËÙµçѹΪU0£¬ÔÚËüµÄÓÒ²àÓÐÓÉˮƽÕý¶Ô·ÅÖõÄƽÐнðÊô°åa¡¢b¹¹³ÉµÄƫתµç³¡£¬ÒÑ֪ƫתµç³¡µÄ°å³¤L="0.10" m£¬°å¼ä¾àÀëd=5.0¡Á10-2 m£¬Á½°å¼ä½ÓÓÐÈçͼ15ÒÒËùʾµÄËæʱ¼ä±ä»¯µÄµçѹU£¬ÇÒa°åµçÊƸßÓÚb°åµçÊÆ¡£ÔÚ½ðÊô°åÓÒ²à´æÔÚÓнçµÄÔÈÇ¿´Å³¡£¬´Å³¡µÄ×ó±ß½çΪÓë½ðÊô°åÓÒ²àÖغϵÄÊúֱƽÃæMN£¬MNÓÒ²àµÄ´Å³¡·¶Î§×ã¹»´ó£¬´Å¸ÐӦǿ¶ÈB=5.0¡Á10-3T£¬·½ÏòÓëƫתµç³¡Õý½»ÏòÀ´¹Ö±Ö½ÃæÏòÀ¡£ÖÊÁ¿ºÍµçºÉÁ¿¶¼ÏàͬµÄ´øÕýµçµÄÁ£×Ó´Ó¾²Ö¹¿ªÊ¼¾­¹ýµçѹU0=50VµÄ¼ÓËٵ糡ºó£¬Á¬ÐøÑØÁ½½ðÊô°å¼äµÄÖÐÏßOO¡ä·½ÏòÉäÈëƫתµç³¡ÖУ¬ÖÐÏßOO¡äÓë´Å³¡±ß½çMN´¹Ö±¡£ÒÑÖª´øµçÁ£×ӵıȺÉ=1.0¡Á108 C/kg£¬²»¼ÆÁ£×ÓËùÊܵÄÖØÁ¦ºÍÁ£×Ó¼äµÄÏ໥×÷ÓÃÁ¦£¬ºöÂÔƫתµç³¡Á½°å¼äµç³¡µÄ±ßԵЧӦ£¬ÔÚÿ¸öÁ£×Óͨ¹ýƫתµç³¡ÇøÓòµÄ¼«¶Ìʱ¼äÄÚ£¬Æ«×ªµç³¡¿ÉÊÓ×÷ºã¶¨²»±ä¡£

¡¾Ð¡Ìâ1¡¿Çót=0ʱ¿ÌÉäÈëƫתµç³¡µÄÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀ룻
¡¾Ð¡Ìâ2¡¿ÇóÁ£×Ó½øÈë´Å³¡Ê±µÄ×î´óËٶȣ»
¡¾Ð¡Ìâ3¡¿¶ÔÓÚËùÓнøÈë´Å³¡ÖеÄÁ£×Ó£¬Èç¹ûÒªÔö´óÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀ룬Ӧ¸Ã²ÉÈ¡ÄÄЩ´ëÊ©£¿ÊÔ´ÓÀíÂÛÉÏÍÆÀí˵Ã÷¡£

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2012½ì¶È±±¾©Êк£µíÇø¸ßÈýµÚһѧÆÚÆÚÄ©Á·Ï°ÎïÀí¾í ÌâÐÍ£º¼ÆËãÌâ

Èçͼ¼×Ëùʾ£¬Ë®Æ½¼ÓËٵ糡µÄ¼ÓËÙµçѹΪU0£¬ÔÚËüµÄÓÒ²àÓÐÓÉˮƽÕý¶Ô·ÅÖõÄƽÐнðÊô°åa¡¢b¹¹³ÉµÄƫתµç³¡£¬ÒÑ֪ƫתµç³¡µÄ°å³¤L=0.10 m£¬°å¼ä¾àÀëd=5.0¡Á10-2 m£¬Á½°å¼ä½ÓÓÐÈçͼ15ÒÒËùʾµÄËæʱ¼ä±ä»¯µÄµçѹU£¬ÇÒa°åµçÊƸßÓÚb°åµçÊÆ¡£ÔÚ½ðÊô°åÓÒ²à´æÔÚÓнçµÄÔÈÇ¿´Å³¡£¬´Å³¡µÄ×ó±ß½çΪÓë½ðÊô°åÓÒ²àÖغϵÄÊúֱƽÃæMN£¬MNÓÒ²àµÄ´Å³¡·¶Î§×ã¹»´ó£¬´Å¸ÐӦǿ¶ÈB=5.0¡Á10-3T£¬·½ÏòÓëƫתµç³¡Õý½»ÏòÀ´¹Ö±Ö½ÃæÏòÀ¡£ÖÊÁ¿ºÍµçºÉÁ¿¶¼ÏàͬµÄ´øÕýµçµÄÁ£×Ó´Ó¾²Ö¹¿ªÊ¼¾­¹ýµçѹU0=50VµÄ¼ÓËٵ糡ºó£¬Á¬ÐøÑØÁ½½ðÊô°å¼äµÄÖÐÏßOO¡ä·½ÏòÉäÈëƫתµç³¡ÖУ¬ÖÐÏßOO¡äÓë´Å³¡±ß½çMN´¹Ö±¡£ÒÑÖª´øµçÁ£×ӵıȺÉ=1.0¡Á108 C/kg£¬²»¼ÆÁ£×ÓËùÊܵÄÖØÁ¦ºÍÁ£×Ó¼äµÄÏ໥×÷ÓÃÁ¦£¬ºöÂÔƫתµç³¡Á½°å¼äµç³¡µÄ±ßԵЧӦ£¬ÔÚÿ¸öÁ£×Óͨ¹ýƫתµç³¡ÇøÓòµÄ¼«¶Ìʱ¼äÄÚ£¬Æ«×ªµç³¡¿ÉÊÓ×÷ºã¶¨²»±ä¡£

1.Çót=0ʱ¿ÌÉäÈëƫתµç³¡µÄÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀ룻

2.ÇóÁ£×Ó½øÈë´Å³¡Ê±µÄ×î´óËٶȣ»

3.¶ÔÓÚËùÓнøÈë´Å³¡ÖеÄÁ£×Ó£¬Èç¹ûÒªÔö´óÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀ룬Ӧ¸Ã²ÉÈ¡ÄÄЩ´ëÊ©£¿ÊÔ´ÓÀíÂÛÉÏÍÆÀí˵Ã÷¡£

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2012½ì¶È±±¾©Êк£µíÇø¸ßÈýÉÏѧÆÚÆÚÄ©¿¼ÊÔÎïÀí¾í ÌâÐÍ£º¼ÆËãÌâ

Èçͼ¼×Ëùʾ£¬Ë®Æ½¼ÓËٵ糡µÄ¼ÓËÙµçѹΪU0£¬ÔÚËüµÄÓÒ²àÓÐÓÉˮƽÕý¶Ô·ÅÖõÄƽÐнðÊô°åa¡¢b¹¹³ÉµÄƫתµç³¡£¬ÒÑ֪ƫתµç³¡µÄ°å³¤L=0.10 m£¬°å¼ä¾àÀëd=5.0¡Á10-2 m£¬Á½°å¼ä½ÓÓÐÈçͼ15ÒÒËùʾµÄËæʱ¼ä±ä»¯µÄµçѹU£¬ÇÒa°åµçÊƸßÓÚb°åµçÊÆ¡£ÔÚ½ðÊô°åÓÒ²à´æÔÚÓнçµÄÔÈÇ¿´Å³¡£¬´Å³¡µÄ×ó±ß½çΪÓë½ðÊô°åÓÒ²àÖغϵÄÊúֱƽÃæMN£¬MNÓÒ²àµÄ´Å³¡·¶Î§×ã¹»´ó£¬´Å¸ÐӦǿ¶ÈB=5.0¡Á10-3T£¬·½ÏòÓëƫתµç³¡Õý½»ÏòÀ´¹Ö±Ö½ÃæÏòÀ¡£ÖÊÁ¿ºÍµçºÉÁ¿¶¼ÏàͬµÄ´øÕýµçµÄÁ£×Ó´Ó¾²Ö¹¿ªÊ¼¾­¹ýµçѹU0=50VµÄ¼ÓËٵ糡ºó£¬Á¬ÐøÑØÁ½½ðÊô°å¼äµÄÖÐÏßOO¡ä·½ÏòÉäÈëƫתµç³¡ÖУ¬ÖÐÏßOO¡äÓë´Å³¡±ß½çMN´¹Ö±¡£ÒÑÖª´øµçÁ£×ӵıȺÉ=1.0¡Á108 C/kg£¬²»¼ÆÁ£×ÓËùÊܵÄÖØÁ¦ºÍÁ£×Ó¼äµÄÏ໥×÷ÓÃÁ¦£¬ºöÂÔƫתµç³¡Á½°å¼äµç³¡µÄ±ßԵЧӦ£¬ÔÚÿ¸öÁ£×Óͨ¹ýƫתµç³¡ÇøÓòµÄ¼«¶Ìʱ¼äÄÚ£¬Æ«×ªµç³¡¿ÉÊÓ×÷ºã¶¨²»±ä¡£

1.Çót=0ʱ¿ÌÉäÈëƫתµç³¡µÄÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀ룻

2.ÇóÁ£×Ó½øÈë´Å³¡Ê±µÄ×î´óËٶȣ»

3.¶ÔÓÚËùÓнøÈë´Å³¡ÖеÄÁ£×Ó£¬Èç¹ûÒªÔö´óÁ£×ÓÔڴų¡±ß½çÉϵÄÈëÉäµãºÍ³öÉäµã¼äµÄ¾àÀ룬Ӧ¸Ã²ÉÈ¡ÄÄЩ´ëÊ©£¿ÊÔ´ÓÀíÂÛÉÏÍÆÀí˵Ã÷¡£

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸