ÌâÄ¿ÄÚÈÝ
6£®ÈçͼËùʾ£¬ÔÚÔÈÇ¿´Å³¡ÇøÓòµÄÉÏ·½ÓÐÒ»°ë¾¶ÎªRµÄµ¼ÌåÔ²»·£¬½«Ô²»·Óɾ²Ö¹ÊÍ·Å£¬Ô²»·¸Õ½øÈë´Å³¡µÄ˲¼äºÍÍêÈ«½øÈë´Å³¡µÄ˲¼äËÙ¶ÈÏàµÈ£®ÒÑÖªÔ²»·µÄµç×èΪr£¬ÔÈÇ¿½ø³¡µÄ´Å¸ÐӦǿ¶ÈΪB£¬ÖØÁ¦¼ÓËÙ¶ÈΪg£¬Ôò£¨¡¡¡¡£©A£® | Ô²»·½øÈë´Å³¡µÄ¹ý³ÌÖУ¬Ô²»·ÖеĵçÁ÷ΪÄæʱÕë | |
B£® | Ô²»·½øÈë´Å³¡µÄ¹ý³Ì¿ÉÄÜ×öÔÈËÙÖ±ÏßÔ˶¯ | |
C£® | Ô²»·½øÈë´Å³¡µÄ¹ý³ÌÖУ¬Í¨¹ýµ¼Ìåij¸öºá½ØÃæµÄµçºÉÁ¿Îª$\frac{¦Ð{R}^{2}B}{2r}$ | |
D£® | Ô²»·½øÈë´Å³¡µÄ¹ý³ÌÖУ¬µç×è²úÉúµÄÈÈÁ¿Îª2mgR |
·ÖÎö ·ÖÎöÇå³þÔ²»·´©¹ý´Å³¡µÄ¹ý³Ì£¬¸ù¾ÝÀã´Î¶¨ÂÉÅжϸÐÓ¦µçÁ÷µÄ·½Ïò£»
¸ù¾ÝÏßÔ²»·½øÈëÓëÀ뿪´Å³¡µÄËÙ¶ÈÅжÏÏß¿òµÄÔ˶¯ÐÔÖÊ£»¸ù¾Ýq=$\frac{¡÷¦Õ}{r}$ÇóµçºÉÁ¿
¸ù¾Ý¶¯Äܶ¨ÀíÇó³öÏß¿òµÄab±ß¸Õ½øÈ˴ų¡µ½ab±ß¸ÕÀ뿪´Å³¡Õâ¶Î¹ý³ÌÖп˷þ°²ÅàÁ¦×öµÄ¹¦£¬¼´¿ÉÖªµÀÏß¿ò´Ó½øÈ뵽ȫ²¿´©¹ý´Å³¡µÄ¹ý³ÌÖп˷þ°²ÅàÁ¦×öµÄ¹¦
½â´ð ½â£ºA¡¢Ô²»·½øÈë´Å³¡µÄ¹ý³ÌÖУ¬´¹Ö±Ö½ÃæÏòÀïµÄ´ÅͨÁ¿Ôö¼Ó£¬¸ù¾ÝÀã´Î¶¨ÂÉ£¬Ô²»·ÖиÐÓ¦µçÁ÷µÄ´ÅͨÁ¿Ó¦´¹Ö±Ö½ÃæÏòÍ⣬ÓÉÓÒÊÖ¶¨ÔòÅжϸÐÓ¦µçÁ÷ΪÄæʱÕë·½Ïò£¬¹ÊAÕýÈ·
B¡¢ÓÉÓÚÔ²»·¸Õ½øÈë´Å³¡µÄ˲¼äºÍÍêÈ«½øÈë´Å³¡µÄ˲¼äËÙ¶ÈÏàµÈ£¬¸Ã¹ý³Ì¸ÐÓ¦µçÁ÷²»Í¬£¬°²ÅàÁ¦²»Í¬£¬¹ÊÏßȦ²»¿ÉÄÜÔÈËÙ£¬¹ÊB´íÎó£»
C¡¢¸ù¾Ýq=$\frac{¡÷¦Õ}{r}$£¬µÃq=$\frac{¡÷¦Õ}{r}$=$\frac{B•¦Ð{R}^{2}-0}{r}$=$\frac{¦Ð{R}^{2}B}{r}$£¬¹ÊC´íÎó
D¡¢ÓÉÓÚÔ²»·¸Õ½øÈë´Å³¡µÄ˲¼äºÍÍêÈ«½øÈë´Å³¡µÄ˲¼äËÙ¶ÈÏàµÈ£¬¸ù¾Ý¶¯Äܶ¨ÀíµÃ£ºmg2R-W=0£¬ËùÒÔW=2mgR£®¹ÊDÕýÈ·£®
¹ÊÑ¡£ºAD
µãÆÀ ½â¾ö±¾ÌâµÄ¹Ø¼üÊÇÇ¡µ±µØÑ¡ÔñÑо¿¹ý³Ì£¬¸ù¾Ý¶¯Äܶ¨ÀíÇó³ö¿Ë·þ°²ÅàÁ¦Ëù×öµÄ¹¦£¬ÒÔ¼°¸ù¾Ý¶¯Á¦Ñ§·ÖÎö³öÏß¿òµÄÔ˶¯Çé¿ö£¬ÖªµÀÏß¿òºÎʱËÙ¶È×îС
A£® | AÇòËùÊܵÄÀÁ¦Ð¡ÓÚBÇòËùÊܵÄÀÁ¦ | |
B£® | Á½Ð¡Çò×öÔÈËÙÔ²ÖÜÔ˶¯µÄÖÜÆÚÏàµÈ | |
C£® | Á½Ð¡Çò×öÔÈËÙÔ²ÖÜÔ˶¯µÄÏßËÙ¶ÈÏàµÈ | |
D£® | Á½Ð¡Çò×öÔÈËÙÔ²ÖÜÔ˶¯µÄÏòÐļÓËÙ¶ÈÏàµÈ |
A£® | Òº¾§¼È¾ßÓÐÒºÌåµÄÁ÷¶¯ÐÔ£¬ÓÖÏñijЩ¾§ÌåÄÇÑù¾ßÓйâѧ¸÷ÏòÒìÐÔ | |
B£® | ¡°ÓÍĤ·¨¹À²â·Ö×ӵĴóС¡±ÊµÑéÖУ¬ÓÃÒ»µÎÓÍËáÈÜÒºµÄÌå»ýÓëdzÅÌÖÐÓÍĤÃæ»ýµÄ±È Öµ¿É¹À²âÓÍËá·Ö×ÓÖ±¾¶ | |
C£® | ÒºÌå±íÃæ²ã·Ö×Ó¼ä¾àÀë´óÓÚÒºÌåÄÚ²¿·Ö×Ó¼ä¾àÀ룬ËùÒÔÒºÌå±íÃæ´æÔÚ±íÃæÕÅÁ¦ | |
D£® | Ò»ÇÐ×ÔÈ»¹ý³Ì×ÜÊÇÑØ×Å·Ö×ÓÈÈÔ˶¯ÎÞÐòÐÔÔö´óµÄ·½Ïò½øÐÐ | |
E£® | ÕáÌÇÊܳ±ºóÕ³ÔÚÒ»ÆðÐγɵÄÌÇ¿é¿´ÆðÀ´Ã»ÓÐÈ·¶¨µÄ¼¸ºÎÐÎ×´£¬ÊǷǾ§Ìå |
A£® | ÔÚAµã£¬½ö¸Ä±ä¦È½ÇµÄ´óС£¬Ð¡ÇòÈÔ¿ÉÄÜˮƽ´òÔÚǽÉϵÄBµã | |
B£® | ÔÚAµã£¬½ö¸Ä±äËÙ¶Èv1´óС£¬ËüÈÔ¿ÉÄÜˮƽ´òÔÚǽÉϵÄBµã | |
C£® | ÔÚBµãÒÔ´óСΪv1µÄËÙ¶ÈˮƽÏò×óÅ׳öСÇò£¬ÔòËü¿ÉÄÜÂäÔÚµØÃæÉϵÄAµã | |
D£® | ÔÚBµãˮƽÏò×óÅ׳öСÇò£¬ÈÃËüÂä»ØµØÃæÉϵÄAµã£¬ÔòÅ׳öµÄËٶȴóСһ¶¨µÈÓÚv2 |
A£® | ¸ÄÓúìÍâÏßÕÕÉä | B£® | ¸ÄÓÃ×ÏÍâÏßÕÕÉä | ||
C£® | Ôö¼Ó»Æ¹âÕÕÉäµÄʱ¼ä | D£® | Ôö´ó»Æ¹âµÄÕÕÉäÇ¿¶È |