ÌâÄ¿ÄÚÈÝ

ÈçͼËùʾ,×ø±êϵxOyλÓÚÊúֱƽÃæÄÚ,ÔÚ¸ÃÇøÓòÄÚÓг¡Ç¿E="12" N/C?·½ÏòÑØxÖáÕý·½ÏòµÄÔÈÇ¿µç³¡ºÍ´Å¸ÐӦǿ¶È´óСΪB=2T?ÑØˮƽ·½ÏòÇÒ´¹Ö±ÓÚxOyƽÃæÖ¸ÏòÖ½ÀïµÄÔÈÇ¿´Å³¡.Ò»¸öÖÊÁ¿m=4¡Á10-5 kg,µçÁ¿q=2.5¡Á10-5C´øÕýµçµÄ΢Á£,ÔÚxOyƽÃæÄÚ×öÔÈËÙÖ±ÏßÔ˶¯,Ô˶¯µ½Ô­µãOʱ,³·È¥´Å³¡,¾­Ò»¶Îʱ¼äºó,´øµç΢Á£Ô˶¯µ½ÁËxÖáÉϵÄPµã.È¡g="10" m/s2,Çó:

(1)Pµãµ½Ô­µãOµÄ¾àÀë;
(2)´øµç΢Á£ÓÉÔ­µãOÔ˶¯µ½PµãµÄʱ¼ä.
(1)15 m  (2)1.2 s
΢Á£Ô˶¯µ½Oµã֮ǰҪÊܵ½ÖØÁ¦?µç³¡Á¦ºÍÂåÂ××ÈÁ¦×÷ÓÃ,ÔÚÕâ¶Îʱ¼äÄÚ΢Á£×öÔÈËÙÖ±ÏßÔ˶¯,˵Ã÷ÈýÁ¦ºÏÁ¦ÎªÁã.
Óɴ˿ɵÃ
                            ¢Ù
µç³¡Á¦FE=Eq                                 ¢Ú
ÂåÂ××ÈÁ¦FB=Bqv                              ¢Û
ÁªÁ¢Çó½â?´úÈëÊý¾ÝµÃv="10" m/s                 ¢Ü
΢Á£Ô˶¯µ½OµãÖ®ºó,³·È¥´Å³¡,΢Á£Ö»Êܵ½ÖØÁ¦?µç³¡Á¦×÷ÓÃ,ÆäºÏÁ¦ÎªÒ»ºãÁ¦,ÇÒ·½ÏòÓë΢Á£ÔÚOµãµÄËٶȷ½Ïò´¹Ö±,ËùÒÔ΢Á£ÔÚºóÒ»¶Îʱ¼äÄÚµÄÔ˶¯ÎªÀàƽÅ×Ô˶¯,¿ÉÑسõËٶȷ½ÏòºÍºÏÁ¦·½Ïò½øÐзֽâ.
tan¦È=                                  ¢Ý
´úÈëÊý¾ÝµÃtan¦È=                         ¢Þ

ÉèÑسõËٶȷ½ÏòµÄλÒÆΪs1,ÑغÏÁ¦·½ÏòµÄλÒÆΪs2,ÔòÒòΪ
s1=vt                                       ¢ß
s2=t2                                           ¢à
                                 ¢á
ÁªÁ¢Çó½â,´úÈëÊý¾Ý¿ÉµÃPµãµ½Ô­µãOµÄ¾àÀë
OP="15" m
Oµãµ½PµãÔ˶¯Ê±¼ä
t="1.2" s.
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
Èçͼ£¨¼×£©Ëùʾ£¬Á½¹â»¬µ¼¹ì¶¼ÓÉˮƽ¡¢ÇãбÁ½²¿·ÖÔ²»¬¶Ô½Ó¶ø³É£¬Ï໥ƽÐзÅÖã¬Á½µ¼¹ìÏà¾àL£½lm £¬Çãбµ¼¹ìÓëˮƽÃæ³É¦È£½30¡ã½Ç£¬Çãбµ¼¹ìµÄÏÂÃ沿·Ö´¦ÔÚÒ»´¹Ö±Ð±ÃæµÄÔÈÇ¿´Å³¡ÇøIÖУ¬IÇøÖдų¡µÄ´Å¸ÐӦǿ¶ÈB1Ëæʱ¼ä±ä»¯µÄ¹æÂÉÈçͼ£¨ÒÒ£©Ëùʾ£¬Í¼ÖÐt1¡¢t2δ֪¡£Ë®Æ½µ¼¹ì×ã¹»³¤£¬Æä×ó¶Ë½ÓÓÐÀíÏëµÄÁéÃôµçÁ÷¼ÆGºÍ¶¨Öµµç×èR£½3¦¸£¬Ë®Æ½µ¼¹ì´¦ÔÚÒ»ÊúÖ±ÏòÉϵÄÔÈÇ¿´Å³¡Çø¢òÖУ¬¢òÇøÖеĴų¡ºã¶¨²»±ä£¬´Å¸ÐӦǿ¶È´óСΪB2£½1T £¬ÔÚt£½0ʱ¿Ì£¬´Óб¹ìÉϴų¡I ÇøÍâij´¦´¹Ö±ÓÚµ¼¹ìˮƽÊÍ·ÅÒ»½ðÊô°ôab£¬°ôµÄÖÊÁ¿m£½0.1kg£¬µç×èr£½2¦¸£¬°ôÏ»¬Ê±Óëµ¼¹ì±£³ÖÁ¼ºÃ½Ó´¥£¬°ôÓÉб¹ì»¬Ïòˮƽ¹ìʱÎÞ»úеÄÜËðʧ£¬µ¼¹ìµÄµç×è²»¼Æ¡£Èô°ôÔÚбÃæÉÏÏòÏ»¬¶¯µÄÕû¸ö¹ý³ÌÖУ¬ÁéÃôµçÁ÷¼ÆGµÄʾÊý´óС±£³Ö²»±ä£¬t2ʱ¿Ì½øÈëˮƽ¹ìµÀ£¬Á¢¿Ì¶Ô°ôʩһƽÐÐÓÚ¿ò¼ÜƽÃæÑØˮƽ·½ÏòÇÒÓë¸Ë´¹Ö±µÄÍâÁ¦¡££¨gÈ¡10m/s2£©Çó£º
£¨1£©´Å³¡ÇøIÔÚÑØб¹ì·½ÏòÉϵĿí¶Èd£»
£¨2£©°ô´Ó¿ªÊ¼Ô˶¯µ½¸ÕºÃ½øÈëˮƽ¹ìµÀÕâ¶Îʱ¼äÄÚab°ôÉϲúÉúµÄÈÈÁ¿£»
£¨3£©Èô°ôÔÚt2ʱ¿Ì½øÈëˮƽµ¼¹ìºó£¬µçÁ÷¼ÆGµÄµçÁ÷´óСIËæʱ¼ät±ä»¯µÄ¹ØϵÈçͼ£¨±û£©Ëùʾ£¨I0δ֪£©£¬ÒÑÖªt2µ½t3µÄʱ¼äΪ0.5s£¬t3µ½t4µÄʱ¼äΪ1s£¬ÇëÔÚͼ£¨¶¡£©ÖÐ×÷³öt2µ½t4ʱ¼äÄÚÍâÁ¦´óСFËæʱ¼ät±ä»¯µÄº¯ÊýͼÏñ¡£

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

¾«Ó¢¼Ò½ÌÍø