ÀýÈç´Ó½âµÄÎïÀíÁ¿µ¥Î»£¬½âËæijЩÒÑÖªÁ¿±ä»¯µÄÇ÷ÊÆ£¬½âÔÚһЩÌØÊâÌõ¼þϵĽá¹ûµÈ·½Ãæ½øÐзÖÎö£¬²¢ÓëÔ¤ÆÚ½á¹û¡¢ÊµÑé½áÂ۵ȽøÐбȽϣ¬´Ó¶øÅжϽâµÄºÏÀíÐÔ»òÕýÈ·ÐÔ¡£

¾ÙÀýÈçÏ£ºÈçͼËùʾ¡£ÖÊÁ¿ÎªM¡¢Çã½ÇΪµÄ»¬¿éA·ÅÓÚˮƽµØÃæÉÏ¡£°ÑÖÊÁ¿ÎªmµÄ»¬¿éB·ÅÔÚAµÄбÃæÉÏ¡£ºöÂÔÒ»ÇÐĦ²Á£¬ÓÐÈËÇóµÃBÏà¶ÔµØÃæµÄ¼ÓËÙ¶Èa =  ,ʽÖÐgΪÖØÁ¦¼ÓËٶȡ£¶ÔÓÚÉÏÊö½â£¬Ä³Í¬Ñ§Ê×ÏÈ·ÖÎöÁ˵ȺÅÓÒ²àÁ¿µÄµ¥Î»£¬Ã»·¢ÏÖÎÊÌâ¡£Ëû½øÒ»²½ÀûÓÃÌØÊâÌõ¼þ¶Ô¸Ã½â×öÁËÈçÏÂËÄÏî·ÖÎöºÍÅжϣ¬ËùµÃ

½áÂÛ¶¼ÊÇ¡°½â¿ÉÄÜÊǶԵġ±¡£µ«ÊÇ£¬ÆäÖÐÓÐÒ»ÏîÊÇ´íÎóµÄ¡£

ÇëÄãÖ¸³ö¸ÃÏî                                                        £¨    £©

 

    A£®µ±£½0ʱ£¬¸Ã½â¸ø³öa=0£¬Õâ·ûºÏ³£Ê¶£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

    B£®µ±£½90ʱ£¬¸Ã½â¸ø³öa=g,Õâ·ûºÏʵÑé½áÂÛ£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

    C£®µ±M >> mʱ£¬¸Ã½â¸ø³öa=gsin,Õâ·ûºÏÔ¤ÆڵĽá¹û£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

    D£®µ±m >> Mʱ£¬¸Ã½â¸ø³öa=g/sin¦È,Õâ·ûºÏÔ¤ÆڵĽá¹û£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

 

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2008?±±¾©£©ÓÐһЩÎÊÌâÄã¿ÉÄܲ»»áÇó½â£¬µ«ÊÇÄãÈÔÓпÉÄܶÔÕâЩÎÊÌâµÄ½âÊÇ·ñºÏÀí½øÐзÖÎöºÍÅжϣ®ÀýÈç´Ó½âµÄÎïÀíÁ¿µ¥Î»£¬½âËæijЩÒÑÖªÁ¿±ä»¯µÄÇ÷ÊÆ£¬½âÔÚÒ»ÖÖÌØÊâÌõ¼þϵĽá¹ûµÈ·½Ãæ½øÐзÖÎö£¬²¢ÓëÔ¤ÆÚ½á¹û£¬ÊµÑé½áÂ۵ȽøÐбȽϣ¬´Ó¶øÅжϽâµÄºÏÀíÐÔ»òÕýÈ·ÐÔ£®
¾ÙÀýÈçÏ£ºÈçͼËùʾ£®ÖÊÁ¿ÎªM£¬Çã½ÇΪ¦ÈµÄ»¬¿éA·ÅÓÚˮƽµØÃæÉÏ£¬°ÑÖÊÁ¿ÎªmµÄ»¬¿éB·ÅÔÚAµÄбÃæÉÏ£®ºöÂÔÒ»ÇÐĦ²Á£¬ÓÐÈËÇóµÃBÏà¶ÔµØÃæµÄ¼ÓËÙ¶Èa=
M+m
M+msin2¦È
gsin¦È
£¬Ê½ÖÐgΪÖØÁ¦¼ÓËٶȣ®
¶ÔÓÚÉÏÊö½â£¬Ä³Í¬Ñ§Ê×ÏÈ·ÖÎöÁ˵ȺÅÓÒ²àÁ¿µÄµ¥Î»£¬Ã»·¢ÏÖÎÊÌ⣮Ëû½øÒ»²½ÀûÓÃÌØÊâÌõ¼þ¶Ô¸Ã½â×öÁËÈçÏÂËÄÏî·ÖÎöºÍÅжϣ¬ËùµÃ½áÂÛ¶¼ÊÇ¡°½â¿ÉÄÜÊǶԵġ±£®µ«ÊÇ£¬ÆäÖÐÓÐÒ»ÏîÊÇ´íÎóµÄ£®ÇëÄãÖ¸³ö¸ÃÏ£¨¡¡¡¡£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

һЩÎÊÌâÄã¿ÉÄܲ»»áÇó½â£¬µ«ÊÇÄãÈÔÓпÉÄܶÔÕâЩÎÊÌâµÄ½âÊÇ·ñºÏÀí½øÐзÖÎöºÍÅжϣ®ÀýÈç´Ó½âµÄÎïÀíÁ¿µ¥Î»£¬½âËæijЩÒÑÖªÁ¿±ä»¯µÄÇ÷ÊÆ£¬½âÔÚһЩÌØÊâÌõ¼þϵĽá¹ûµÈ·½Ãæ½øÐзÖÎö£¬²¢ÓëÔ¤ÆÚ½á¹û¡¢ÊµÑé½áÂ۵ȽøÐбȽϣ¬´Ó¶øÅжϽâµÄºÏÀíÐÔ»òÕýÈ·ÐÔ£®¾ÙÀýÈçÏ£ºÉùÒôÔÚ¿ÕÆøÖеĴ«²¥ËÙ¶ÈvÓë¿ÕÆøµÄÃܶȦѡ¢Ñ¹Ç¿PÓйأ®ÏÂÁÐËٶȱí´ïʽÖУ¬kΪ±ÈÀýϵÊý£¬ÎÞµ¥Î»£¬ÔòÕâËĸö±í´ïʽÖпÉÄÜÕýÈ·µÄÊÇ£¨¡¡¡¡£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÓÐһЩÎÊÌâÄã¿ÉÄܲ»»áÇó½â£¬µ«ÊÇÄãÈÔÓпÉÄܶÔÕâЩÎÊÌâµÄ½âÊÇ·ñºÏÀí½øÐзÖÎöºÍÅжϣ®ÀýÈç´Ó½âµÄÎïÀíÁ¿µ¥Î»£¬½âËæijЩÒÑÖªÁ¿±ä»¯µÄÇ÷ÊÆ£¬½âÔÚһЩÌØÊâÌõ¼þϵĽá¹ûµÈ·½Ãæ½øÐзÖÎö£¬²¢ÓëÔ¤ÆÚ½á¹û¡¢ÊµÑé½áÂ۵ȽøÐбȽϣ¬´Ó¶øÅжϽâµÄºÏÀíÐÔ»òÕýÈ·ÐÔ£®¾ÙÀýÈçÏ£ºÈçͼËùʾ£®ÖÊÁ¿ÎªM¡¢Çã½ÇΪ¦ÈµÄ»¬¿éA·ÅÓÚˮƽµØÃæÉÏ£®°ÑÖÊÁ¿ÎªmµÄ»¬¿éB·ÅÔÚAµÄбÃæÉÏ£®ºöÂÔÒ»ÇÐĦ²Á£¬ÓÐÈËÇóµÃBÏà¶ÔµØÃæµÄ¼ÓËÙ¶Èa=
M+m
M+msin2¦È
gsin¦È
£¬Ê½ÖÐgΪÖØÁ¦¼ÓËٶȣ®¶ÔÓÚÉÏÊö½â£¬Ä³Í¬Ñ§Ê×ÏÈ·ÖÎöÁ˵ȺÅÓÒ²àÁ¿µÄµ¥Î»£¬Ã»·¢ÏÖÎÊÌ⣮Ëû½øÒ»²½ÀûÓÃÌØÊâÌõ¼þ¶Ô¸Ã½â×öÁËÈçÏÂËÄÏî·ÖÎöºÍÅжϣ¬ËùµÃ½áÂÛ¶¼ÊÇ¡°½â¿ÉÄÜÊǶԵġ±£®µ«ÊÇ£¬ÆäÖÐÓÐÒ»ÏîÊÇ´íÎóµÄ£®ÇëÄãÖ¸³ö¸ÃÏ£¨¡¡¡¡£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÓÐһЩÎÊÌâÄã¿ÉÄܲ»»áÇó½â£¬µ«ÊÇÄãÈÔÓпÉÄܶÔÕâЩÎÊÌâµÄ½âÊÇ·ñºÏÀí½øÐзÖÎöºÍÅжϡ£ÀýÈç´Ó½âµÄÎïÀíÁ¿µ¥Î»£¬½âËæijЩÒÑÖªÁ¿±ä»¯µÄÇ÷ÊÆ£¬½âÔÚһЩÌØÊâÌõ¼þϵĽá¹ûµÈ·½Ãæ½øÐзÖÎö£¬²¢ÓëÔ¤ÆÚ½á¹û¡¢ÊµÑé½áÂ۵ȽøÐбȽϣ¬´Ó¶øÅжϽâµÄºÏÀíÐÔ»òÕýÈ·ÐÔ¡£

¾ÙÀýÈçÏ£ºÈçͼËùʾ¡£ÖÊÁ¿ÎªM¡¢Çã½ÇΪµÄ»¬¿éA·ÅÓÚˮƽµØÃæÉÏ¡£°ÑÖÊÁ¿ÎªmµÄ»¬¿éB·ÅÔÚAµÄбÃæÉÏ£¬ºöÂÔÒ»ÇÐĦ²Á£¬ÓÐÈËÇóµÃBÏà¶ÔµØÃæµÄ¼ÓËÙ¶Èa=£¬Ê½ÖÐgΪÖØÁ¦¼ÓËٶȡ£

¶ÔÓÚÉÏÊö½â£¬Ä³Í¬Ñ§Ê×ÏÈ·ÖÎöÁ˵ȺÅÓÒ²àÁ¿µÄµ¥Î»£¬Ã»·¢ÏÖÎÊÌâ¡£Ëû½øÒ»²½ÀûÓÃÌØÊâÌõ¼þ¶Ô¸Ã½â×öÁËÈçÏÂËÄÏî·ÖÎöºÍÅжϣ¬ËùµÃ½áÂÛ¶¼ÊÇ¡°½â¿ÉÄÜÊǶԵġ±¡£µ«ÊÇ£¬ÆäÖÐÓÐÒ»ÏîÊÇ´íÎóµÄ¡£ÇëÄãÖ¸³ö¸ÃÏî¡£

A.µ±£½0ʱ£¬¸Ã½â¸ø³öa=0£¬Õâ·ûºÏ³£Ê¶£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

B.µ±£½90ʱ£¬¸Ã½â¸ø³öa=g£¬Õâ·ûºÏʵÑé½áÂÛ£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

C.µ±M£¾£¾mʱ£¬¸Ã½â¸ø³öa¡Ögsin£¬Õâ·ûºÏÔ¤ÆڵĽá¹û£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

D.µ±m£¾£¾Mʱ£¬¸Ã½â¸ø³öa¡Ö£¬Õâ·ûºÏÔ¤ÆڵĽá¹û£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2012-2013ѧÄêÉÂÎ÷Ê¡¸ßÈýµÚÒ»´ÎÔ¿¼ÎïÀíÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£ºÑ¡ÔñÌâ

ÓÐһЩÎÊÌâÄã¿ÉÄܲ»»áÇó½â£¬µ«ÊÇÄãÈÔÓпÉÄܶÔÕâЩÎÊÌâµÄ½âÊÇ·ñºÏÀí½øÐзÖÎöºÍÅжϡ£ÀýÈç´Ó½âµÄÎïÀíÁ¿µ¥Î»£¬½âËæijЩÒÑÖªÁ¿±ä»¯µÄÇ÷ÊÆ£¬½âÔÚһЩÌØÊâÌõ¼þϵĽá¹ûµÈ·½Ãæ½øÐзÖÎö£¬²¢ÓëÔ¤ÆÚ½á¹û¡¢ÊµÑé½áÂ۵ȽøÐбȽϣ¬´Ó¶øÅжϽâµÄºÏÀíÐÔ»òÕýÈ·ÐÔ¡£

¾ÙÀýÈçÏ£ºÈçͼËùʾ¡£ÖÊÁ¿ÎªM¡¢Çã½ÇΪµÄ»¬¿éA·ÅÓÚˮƽµØÃæÉÏ¡£°ÑÖÊÁ¿ÎªmµÄ»¬¿éB·ÅÔÚAµÄбÃæÉÏ¡£ºöÂÔÒ»ÇÐĦ²Á£¬ÓÐÈËÇóµÃBÏà¶ÔµØÃæµÄ¼ÓËÙ¶Èa=,ʽÖÐgΪÖØÁ¦¼ÓËٶȡ£

¶ÔÓÚÉÏÊö½â£¬Ä³Í¬Ñ§Ê×ÏÈ·ÖÎöÁ˵ȺÅÓÒ²àÁ¿µÄµ¥Î»£¬Ã»·¢ÏÖÎÊÌâ¡£Ëû½øÒ»²½ÀûÓÃÌØÊâÌõ¼þ¶Ô¸Ã½â×öÁËÈçÏÂËÄÏî·ÖÎöºÍÅжϣ¬ËùµÃ½áÂÛ¶¼ÊÇ¡°½â¿ÉÄÜÊǶԵġ±¡£µ«ÊÇ£¬ÆäÖÐÓÐÒ»ÏîÊÇ´íÎóµÄ¡£ÇëÄãÖ¸³ö¸ÃÏî¡£

A¡¢µ±=0ʱ£¬¸Ã½â¸ø³öa=0£¬Õâ·ûºÏ³£Ê¶£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

B¡¢µ±£½900ʱ£¬¸Ã½â¸ø³öa=g,Õâ·ûºÏʵÑé½áÂÛ£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

C¡¢µ±MÔ¶´óÓÚmʱ£¬¸Ã½â¸ø³öa=gsin,Õâ·ûºÏÔ¤ÆڵĽá¹û£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

D¡¢µ±mÔ¶´óÓÚMʱ£¬¸Ã½â¸ø³öa=g/sinÕâ·ûºÏÔ¤ÆڵĽá¹û£¬ËµÃ÷¸Ã½â¿ÉÄÜÊǶԵÄ

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸