ÌâÄ¿ÄÚÈÝ
12£®Èçͼ1ËùʾµÄʵÑé×°ÖÃÑéÖ¤»úеÄÜÊغ㶨ÂÉ£¬ÊµÑéËùÓõĵçԴΪѧÉúµçÔ´£¬Êä³öµçѹΪ6VµÄ½»Á÷µçºÍÖ±Á÷µçÁ½ÖÖ£®ÖØ´¸´Ó¸ß´¦Óɾ²Ö¹¿ªÊ¼ÂäÏ£¬ÖØ´¸ÉÏÍÏ×ŵÄÖ½´øͨ¹ý´òµã¼ÆʱÆ÷´ò³öһϵÁеĵ㣬¶ÔÖ½´øÉϵĵãºÛ¼£½øÐвâÁ¿£¬¼´¿ÉÑéÖ¤»úеÄÜÊغ㶨ÂÉ£®£¨1£©ÏÂÃæÁоÙÁ˸ÃʵÑéµÄ¼¸¸ö²Ù×÷²½Ö裺
A£®°´ÕÕͼʾµÄ×°Öð²×°Æ÷¼þ£»
B£®½«´òµã¼ÆʱÆ÷½Óµ½µçÔ´µÄÖ±Á÷Êä³ö¶ËÉÏ£»
C£®ÓÃÌìƽ²âÁ¿³öÖØ´¸µÄÖÊÁ¿£»
D£®½ÓͨµçÔ´¿ª¹Ø£¬Í¬Ê±·Å¿ªÐü¹ÒÖ½´øµÄ¼Ð×Ó£¬´ò³öÒ»ÌõÖ½´ø£»
E£®²âÁ¿´ò³öµÄÖ½´øÉÏijЩµãÖ®¼äµÄ¾àÀ룻
F£®¸ù¾Ý²âÁ¿µÄ½á¹û¼ÆËãÖØ´¸ÏÂÂä¹ý³ÌÖмõÉÙµÄÖØÁ¦ÊÆÄÜÊÇ·ñµÈÓÚÔö¼ÓµÄ¶¯ÄÜ£®
Ö¸³öÆäÖвÙ×÷²»Ç¡µ±µÄºÍûÓбØÒª½øÐеIJ½Ö裬½«ÆäÑ¡Ïî¶ÔÓ¦µÄ×ÖĸÌîÔÚÏÂÃæµÄºáÏßÉÏ£®BC
£¨2£©Èçͼ2Ëùʾ£¬¸ù¾Ý´ò³öµÄÖ½´ø£¬Ñ¡È¡Ö½´øÉÏ´ò³öµÄÁ¬ÐøÎå¸öµãA¡¢B¡¢C¡¢D¡¢E£¬²â³öAµã¾àÆðʼµãOµÄ¾àÀëΪs0£¬µãA¡¢C¼äµÄ¾àÀëΪs1£¬µãC¡¢E¼äµÄ¾àÀëΪs2£¬Ê¹Óý»Á÷µçµÄƵÂÊΪf£¬Ôò¸ù¾ÝÕâЩÌõ¼þ¼ÆËãÏÂÂäµ½CµãµÄËٶȱí´ïʽΪ£ºv=$\frac{£¨{s}_{1}+{s}_{2}£©f}{4}$£®
£¨3£©ÔÚÑéÖ¤»úеÄÜÊغ㶨ÂɵÄʵÑéÖз¢ÏÖ£¬ÖØ´¸¼õСµÄÖØÁ¦ÊÆÄÜ×ÜÊÇ´óÓÚÖØ´¸Ôö¼ÓµÄ¶¯ÄÜ£¬ÆäÖ÷ÒªÔÒòÊÇ£ºÖØ´¸ÏÂÂä¹ý³ÌÖдæÔÚ×Å×èÁ¦×÷Óã®
·ÖÎö £¨1£©¸ù¾ÝʵÑéµÄÔÀíºÍ²Ù×÷ÖеÄ×¢ÒâÊÂÏîÈ·¶¨²»Ç¡µ±µÄ²½ÖèÒÔ¼°Ã»ÓбØÒªµÄ²½Ö裮
£¨2£©¸ù¾Ýij¶Îʱ¼äÄÚµÄƽ¾ùËٶȵÈÓÚÖмäʱ¿ÌµÄ˲ʱËÙ¶ÈÇó³öCµãµÄ˲ʱËٶȣ®
£¨3£©¸ù¾ÝÄÜÁ¿Êغã·ÖÎöÖØ´¸¼õСµÄÖØÁ¦ÊÆÄÜ×ÜÊÇ´óÓÚÖØ´¸Ôö¼ÓµÄ¶¯ÄܵÄÔÒò£®
½â´ð ½â£º£¨1£©B¡¢´òµã¼ÆʱÆ÷Ó¦½Ó½»Á÷µçÔ´£¬¹ÊB´íÎó£®
C¡¢¸ÃʵÑéÑéÖ¤¶¯ÄܵÄÔö¼ÓÁ¿ºÍÖØÁ¦ÊÆÄܵļõСÁ¿ÊÇ·ñÏàµÈ£¬ÖÊÁ¿¿ÉÒÔԼȥ£¬ËùÒÔ²»ÐèÒªÓÃÌìƽ²âÁ¿ÖØ´¸µÄÖÊÁ¿£¬¹ÊC²»±ØÒª£®
¹ÊÑ¡£ºBC£®
£¨2£©¸ù¾Ýij¶Îʱ¼äÄÚµÄƽ¾ùËٶȵÈÓÚÖмäʱ¿ÌµÄ˲ʱËÙ¶ÈÖª£¬${v}_{C}=\frac{{s}_{1}+{s}_{2}}{4T}$=$\frac{£¨{s}_{1}+{s}_{2}£©f}{4}$£®
£¨3£©ÔÚÑéÖ¤»úеÄÜÊغ㶨ÂɵÄʵÑéÖз¢ÏÖ£¬ÖØ´¸¼õСµÄÖØÁ¦ÊÆÄÜ×ÜÊÇ´óÓÚÖØ´¸Ôö¼ÓµÄ¶¯ÄÜ£¬ÆäÖ÷ÒªÔÒòÊÇÖØ´¸ÏÂÂä¹ý³ÌÖдæÔÚ×Å×èÁ¦×÷Óã¬Ê¹µÃ²¿·ÖÖØÁ¦ÊÆÄܵļõСÁ¿×ª»¯ÎªÄÚÄÜ£®
¹Ê´ð°¸Îª£º£¨1£©BC£¬£¨2£©$\frac{£¨{s}_{1}+{s}_{2}£©f}{4}$£¬£¨3£©ÖØ´¸ÏÂÂä¹ý³Ì´æÔÚ×Å×èÁ¦×÷Óã®
µãÆÀ ½â¾ö±¾ÌâµÄ¹Ø¼üÖªµÀʵÑéµÄÔÀí£¬×¥×¡ÖØÁ¦ÊÆÄܵļõСÁ¿ÊÇ·ñµÈÓÚ¶¯ÄܵÄÔö¼ÓÁ¿½øÐÐÑéÖ¤£¬»á¸ù¾ÝϽµµÄ¸ß¶ÈÇó½âÖØÁ¦ÊÆÄܵļõСÁ¿£¬¸ù¾Ýij¶Îʱ¼äÄÚµÄƽ¾ùËٶȵÈÓÚÖмäʱ¿ÌµÄ˲ʱËÙ¶ÈÇó½â˲ʱËٶȣ¬´Ó¶øÇó½â¶¯ÄܵÄÔö¼ÓÁ¿£®
A£® | AµÆ±ÈÔÀ´ÁÁ | B£® | BµÆ±ÈÔÀ´°µ | C£® | CµÆºÍÔÀ´Ò»ÑùÁÁ | D£® | CµÆ±ÈÔÀ´ÁÁ |
A£® | aÇòµÄ¶¯ÄÜʼÖÕ¼õС | |
B£® | bÇò¿Ë·þµ¯»Éµ¯Á¦×öµÄ¹¦ÊǸ˶ÔbÇò×ö¹¦µÄ3±¶ | |
C£® | µ¯»É¶ÔbÇò×öµÄ¹¦µÈÓÚa¡¢bÁ½Çò»úеÄܵı仯Á¿ | |
D£® | bÇòµ½´ï×îµ×µãʱ¸Ë¶ÔaÇòµÄ×÷ÓÃÁ¦µÈÓÚmg |
A£® | ºÏÉÏ¿ª¹ØS½Óͨµç·ʱ£¬A1ºÍA2ʼÖÕÒ»ÑùÁÁ | |
B£® | ºÏÉÏ¿ª¹ØS½Óͨµç·ʱ£¬A2ÏÈÁÁ£¬A1ºóÁÁ£¬×îºóÒ»ÑùÁÁ | |
C£® | ¶Ï¿ª¿ª¹ØSʱ£¬A2Á¢¼´Ï¨Ãð£¬A1¹ýÒ»»á²ÅϨÃð | |
D£® | ¶Ï¿ª¿ª¹ØSʱ£¬A1ºÍA2¶¼Òª¹ýÒ»»á²ÅϨÃð£¬ÇÒͨ¹ýA2µÄµçÁ÷·½ÏòÓëÔµçÁ÷·½ÏòÏà·´ |
A£® | U2±ä´ó | B£® | PRÔö´ó | C£® | U4±ä´ó | D£® | I1±äС |
A£® | ËÙ¶ÈÒ»¶¨²»¶Ï±ä»¯ | B£® | ËÙÂÊÒ»¶¨²»¶Ï±ä»¯ | ||
C£® | ¼ÓËٶȵĴóСһ¶¨²»¶Ï±ä»¯ | D£® | ¼ÓËٶȵķ½ÏòÒ»¶¨²»¶Ï±ä»¯ |
A£® | ¸ÃÖʵãµÄλÒÆÓëʱ¼äÂú×ãx=4sin$\frac{4}{¦Ð}$t£¨cm£© | |
B£® | ÔÚt=1sʱ£¬ÖʵãµÄλÒÆΪ2$\sqrt{2}$cm | |
C£® | ÔÚt=1sºÍt=5sʱ£¬ÖʵãÊܵ½µÄ»Ø¸´Á¦Ïàͬ | |
D£® | ÔÚt=2017sʱ£¬ÖʵãµÄËÙ¶ÈΪ×î´ó | |
E£® | ÔÚ2¡«4sÄÚ£¬ÖʵãµÄµ¯ÐÔÊÆÄÜÔÚ²»¶Ï¼õС |
A£® | Ïß¿òÊܵ½µÄˮƽÍâÁ¦Ò»¶¨ÊǺ㶨µÄ | |
B£® | Ïß¿ò±ß³¤Óë´Å³¡¿í¶ÈµÄ±ÈֵΪ3£º8 | |
C£® | ³ö´Å³¡µÄʱ¼äÊǽøÈë´Å³¡Ê±µÄÒ»°ë | |
D£® | ³ö´Å³¡µÄ¹ý³ÌÖÐÍâÁ¦×öµÄ¹¦Óë½øÈë´Å³¡µÄ¹ý³ÌÖÐÍâÁ¦×öµÄ¹¦ÏàµÈ |