ijͬѧվÔÚ×°ÓÐÁ¦´«¸ÐÆ÷µÄÇá°åÉÏ×ö϶×-ÆðÁ¢µÄ¶¯×÷¡£.ÈçͼËùʾΪ¼Ç¼µÄÁ¦Ëæʱ¼ä±ä»¯µÄͼÏߣ¬×Ý×ø±êΪÁ¦£¨µ¥Î»ÎªÅ£¶Ù£©£¬ºá×ø±êΪʱ¼ä£¨µ¥Î»ÎªÃë)¡£ÓÉͼÏß¿ÉÖª£¬¸ÃͬѧµÄÌåÖØԼΪ650N£¬³ý´ËÒÔÍ⣬ÒÔÏÂÓйØÓÉͼÏß»¹¿ÉÒԵõ½µÄÐÅÏ¢£¬ÆäÖÐÕýÈ·µÄÊÇ£¨¡¡¡¡£©

A£®¸Ãͬѧ×öÁËÁ½´Î϶×-ÆðÁ¢µÄ¶¯×÷ 
B£®¸Ãͬѧ×öÁËÒ»´Î϶×-ÆðÁ¢µÄ¶¯×÷£¬ÇÒ϶׺óÔ¼2sÆðÁ¢ 
C£®Ï¶׹ý³ÌÖÐÈË´¦ÓÚʧÖØ״̬£¬ÆðÁ¢¹ý³ÌÖÐÈË´¦ÓÚ³¬ÖØ״̬ 
D£®Ï¶׹ý³ÌÖÐÈËËùÊÜÖØÁ¦ÏȱäСºó±ä´ó 

B

½âÎöÊÔÌâ·ÖÎö£ºÓÉͼÏß¿É¿´³ö£¬¸ÃͬѧÏÈʧÖغó³¬ÖØ£¬ÔÙ³¬ÖØÔÙʧÖصĹý³Ì£¬¼´¸ÃͬѧÏȼÓËÙ϶׺ó¼õËÙ϶ף¬ÔÙ¼ÓËÙÆðÁ¢£¬ÔÙ¼õËÙÆðÁ¢£¬¼´¸Ãͬѧ¾­ÀúÁËÒ»´Î϶×-ÆðÁ¢µÄ¶¯×÷£¬´ÓͼÏñ¿´³ö϶׺óÔ¼2sÆðÁ¢£¬Ñ¡ÏîA ´íÎó£¬BÕýÈ·£»Ï¶׺ÍÆðÁ¢¹ý³ÌÖж¼Óг¬ÖغÍʧÖØ״̬£¬Ñ¡ÏîC ´íÎó£»Ï¶׺ÍÆðÁ¢¹ý³ÌÖÐÈËËùÊÜÖØÁ¦±£³Ö²»±ä£¬Ñ¡ÏîD´íÎó¡£
¿¼µã£º³¬ÖغÍʧÖØ¡£

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºµ¥Ñ¡Ìâ

ÏÂÁÐÇé¾°ÖУ¬¹ØÓÚÁ¦µÄ´óС¹Øϵ£¬Ëµ·¨ÕýÈ·µÄÊÇ

A£®Ìø¸ßÔ˶¯Ô±ÆðÌø£¬µØ¶ÔÈ˵ÄÖ§³ÖÁ¦´óÓÚÈ˶ԵصÄѹÁ¦
B£®»ð¼ý¼ÓËÙÉÏÉýʱ£¬»ð¼ý·¢¶¯»úµÄÍÆÁ¦´óÓÚ»ð¼ýµÄÖØÁ¦
C£®¼¦µ°×²»÷ʯͷ£¬¼¦µ°ÆÆË飬¼¦µ°¶ÔʯͷµÄ×÷ÓÃÁ¦Ð¡ÓÚʯͷ¶Ô¼¦µ°µÄ×÷ÓÃÁ¦
D£®¸ÖË¿ÉþµõÆð»õÎï¼ÓËÙÉÏÉýʱ£¬¸ÖË¿Éþ¶Ô»õÎïµÄÀ­Á¦´óÓÚ»õÎï¶Ô¸ÖË¿ÉþµÄÀ­Á¦

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºµ¥Ñ¡Ìâ

СÃ÷Õ¾ÔÚˮƽµØÃæÉÏ£¬ÊÖÎÕ²»¿ÉÉ쳤µÄÇáÉþÒ»¶Ë£¬ÉþµÄÁíÒ»¶ËϵÓÐÖÊÁ¿ÎªmµÄСÇò£¬Ë¦¶¯ÊÖÍó£¬Ê¹ÇòÔÚÊúֱƽÃæÄÚ×öÔ²ÖÜÔ˶¯£®µ±Çòij´ÎÔ˶¯µ½×îµÍµãʱ£¬ÉþͻȻ¶Ïµô£¬Çò·ÉÐÐˮƽ¾àÀëdºóÂäµØ£¬ÈçÓÒͼËùʾ£®ÒÑÖªÎÕÉþµÄÊÖÀëµØÃæ¸ß¶ÈΪd£¬ÊÖÓëÇòÖ®¼äµÄÉþ³¤Îª£¬ÖØÁ¦¼ÓËÙ¶ÈΪg.ºöÂÔÊÖµÄÔ˶¯°ë¾¶ºÍ¿ÕÆø×èÁ¦£®

(1)ÇóÉþ¶ÏʱÇòµÄËٶȴóСv1ºÍÇòÂäµØʱµÄËٶȴóСv2.
(2)ÎÊÉþÄܳÐÊܵÄ×î´óÀ­Á¦¶à´ó£¿
(3)¸Ä±äÉþ³¤£¬Ê¹ÇòÖظ´ÉÏÊöÔ˶¯£¬ÈôÉþÈÔÔÚÇòÔ˶¯µ½×îµÍµãʱ¶Ïµô£¬ÒªÊ¹ÇòÅ׳öµÄˮƽ¾àÀë×î´ó£¬Éþ³¤Ó¦Îª¶àÉÙ£¿×î´óˮƽ¾àÀëΪ¶àÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºµ¥Ñ¡Ìâ

ÈçÓÒÉÏͼËùʾ£¬Ë®Æ½´«ËÍ´øÒÔËÙ¶Èv1ÔÈËÙÔ˶¯£¬Ð¡ÎïÌåP¡¢QÓÉͨ¹ý¶¨»¬ÂÖÇÒ²»¿ÉÉ쳤µÄÇáÉþÏàÁ¬£¬t = 0ʱ¿ÌPÔÚ´«ËÍ´ø×ó¶Ë¾ßÓÐËÙ¶Èv2£¬ÒÑÖªv1£¾v2£¬PÓ붨»¬ÂÖ¼äµÄÉþˮƽ¡£²»¼Æ¶¨»¬ÂÖÖÊÁ¿£¬Éþ×ã¹»³¤¡£Ö±µ½ÎïÌåP´Ó´«ËÍ´øÓÒ²àÀ뿪¡£ÒÔÏÂÅжÏÕýÈ·µÄÊÇ£¨  £©

A£®ÎïÌåPÒ»¶¨ÏȼÓËÙºóÔÈËÙ B£®ÎïÌåP¿ÉÄÜÏȼÓËÙºóÔÈËÙ 
C£®ÎïÌåQµÄ»úеÄÜÒ»Ö±Ôö¼Ó D£®ÎïÌåQÒ»Ö±´¦ÓÚ³¬ÖØ״̬ 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºµ¥Ñ¡Ìâ

ÎÒ¹úÔ˶¯Ô±ÔÚ°ÂÔË»áÉÏÈ¡µÃµÄÍ»³ö³É¼¨¼«´óµØÍƶ¯ÁËÈ«Ãñ½¡ÉíÔ˶¯¡£Ð¡¾üÔÚУÇï¼¾Ô˶¯»áÉÏÒÔ1.93mµÄ³É¼¨»ñµÃÁ˸ßÖÐ×éÄÐ×ÓÌø¸ß¹Ú¾ü¡£²»¼Æ¿ÕÆø×èÁ¦£¬ÔòС¾ü

A£®ÔÚϽµ¹ý³ÌÖд¦ÓÚÍêȫʧÖØ״̬
B£®ÀëµØºóµÄÉÏÉý¹ý³ÌÖд¦ÓÚ³¬ÖØ״̬
C£®ÆðÌø¹ý³ÌÖУ¬µØÃæ¶ÔËûµÄƽ¾ùÖ§³ÖÁ¦´óÓÚËûµÄÖØÁ¦
D£®ÆðÌø¹ý³ÌÖУ¬µØÃæ¶ÔËûµÄƽ¾ùÖ§³ÖÁ¦Ð¡ÓÚËûµÄÖØÁ¦

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºµ¥Ñ¡Ìâ

СÃ÷Õ¾ÔÚµçÌÝÀïµÄÌåÖؼÆÉÏ£¬ÌåÖؼƵÄʾÊýÔö´ó£¬¿ÉÄܵÄÔ­ÒòÊÇ

A£®µçÌÝÔÈËÙÉÏÉý B£®µçÌݼõËÙÉÏÉý C£®µçÌݼÓËÙϽµ D£®µçÌݼõËÙϽµ 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºµ¥Ñ¡Ìâ

ÈçͼËùʾ£¬A¡¢BÁ½ÈËÓð²È«´øÁ¬½ÓÔÚÒ»Æ𣬴ӷɻúÉÏÌøϽøÐÐË«ÈËÌøÉ¡Ô˶¯£¬½µÂäɡδ´ò¿ªÊ±²»¼Æ¿ÕÆø×èÁ¦¡£ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ

A£®ÔÚ½µÂäɡδ´ò¿ªµÄϽµ¹ý³ÌÖУ¬°²È«´øµÄ×÷ÓÃÁ¦Ò»¶¨ÎªÁã
B£®ÔÚ½µÂäɡδ´ò¿ªµÄϽµ¹ý³ÌÖУ¬°²È«´øµÄ×÷ÓÃÁ¦´óÓÚBµÄÖØÁ¦
C£®ÔÚ½µÂäɡδ´ò¿ªµÄϽµ¹ý³ÌÖУ¬°²È«´øµÄ×÷ÓÃÁ¦µÈÓÚBµÄÖØÁ¦
D£®ÔÚ½µÂäÉ¡´ò¿ªºóµÄϽµ¹ý³ÌÖУ¬°²È«´øµÄ×÷ÓÃÁ¦Ð¡ÓÚBµÄÖØÁ¦

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºµ¥Ñ¡Ìâ

ÈçͼËùʾ£¬A¡¢BÁ½ÎïÌåµþ·ÅÔÚÒ»Æð£¬ÒÔÏàͬµÄ³õËÙ¶ÈÉÏÅ×£¨²»¼Æ¿ÕÆø×èÁ¦£©¡£ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨    £©

A£®ÔÚÉÏÉýºÍϽµ¹ý³ÌÖÐA¶ÔBµÄѹÁ¦Ò»¶¨ÎªÁã
B£®ÉÏÉý¹ý³ÌÖÐA¶ÔBµÄѹÁ¦´óÓÚAÎïÌåÊܵ½µÄÖØÁ¦
C£®Ï½µ¹ý³ÌÖÐA¶ÔBµÄѹÁ¦´óÓÚAÎïÌåÊܵ½µÄÖØÁ¦
D£®ÔÚÉÏÉýºÍϽµ¹ý³ÌÖÐA¶ÔBµÄѹÁ¦µÈÓÚAÎïÌåÊܵ½µÄÖØÁ¦

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºµ¥Ñ¡Ìâ

ÈçͼËùʾ£¬×öÔÈËÙÖ±ÏßÔ˶¯µÄС³µAͨ¹ýÒ»¸ùÈƹý¶¨»¬Âֵij¤ÉþµõÆðÒ»ÖØÎïB£¬ÉèÖØÎïºÍС³µËٶȵĴóС·Ö±ðΪvB¡¢vA£¬Ôò

A£®vA>vB
B£®vA<vB
C£®ÉþµÄÀ­Á¦´óÓÚBµÄÖØÁ¦
D£®ÉþµÄÀ­Á¦µÈÓÚBµÄÖØÁ¦

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸