ΪÁËÑо¿¹ýɽ³µµÄÔ­Àí£¬ÎïÀíС×éÌá³öÁËÏÂÃæµÄÉèÏ룺ȡһ¸öÓëˮƽ·½Ïò¼Ð½ÇΪ37°¡¢³¤ÎªL=2.0mµÄ´Ö²ÚµÄÇãб¹ìµÀAB£¬Í¨¹ýˮƽ¹ìµÀBCÓëÊúÖ±Ô²¹ìµÀÏàÁ¬£¬³ö¿ÚΪˮƽ¹ìµÀDE£¬Õû¸ö¹ìµÀ³ýAB¶ÎÒÔÍⶼÊǹ⻬µÄ£®ÆäÖÐABÓëBC¹ìµÀÒÔ΢СԲ»¡Ïà½Ó£¬ÈçͼËùʾ£®Ò»¸öÎï¿éÒÔ³õËÙ¶Èv=4.0m/s£¬´Óijһ¸ß´¦Ë®Æ½Å׳ö£¬µ½AµãʱËٶȷ½ÏòÇ¡ÑØAB·½Ïò£¬²¢ÑØÇãб¹ìµÀ»¬Ï£®ÒÑÖªÎï¿éÓëÇãб¹ìµÀ¼äµÄ¶¯Ä¦²ÁÒòÊý¦Ì=0.50£®£¨gÈ¡10m/s2£¬sin37°=0.6£¬cos37°=0.8£©
£¨1£©ÒªÊ¹Ð¡Îï¿é²»À뿪¹ìµÀ£¬²¢´Óˮƽ¹ìµÀDE»¬³ö£¬ÇóÊúÖ±Ô²¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãʲôÌõ¼þ£¿
£¨2£©ÎªÁËÈÃСÎï¿é²»À뿪¹ìµÀ£¬²¢ÇÒÄܹ»»¬»ØÇãб¹ìµÀAB£¬ÔòÊúÖ±Ô²¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãʲôÌõ¼þ£¿
£¨3£©Èô°´ÕÕ£¨2£©µÄÒªÇó£¬Ð¡Îï¿é½øÈë¹ìµÀºó¿ÉÒÔÓжàÉÙ´Îͨ¹ýÔ²¹ìµÀÉϾàˮƽ¹ìµÀ¸ßΪ0£®O1mµÄijһµã£¿

¡¾´ð°¸¡¿·ÖÎö£º£¨1£©Í¨¹ýƽÅ×Ô˶¯µÄ¹æÂÉÇó³öСÎï¿éµ½´ïA´¦Ê±ÏÂÂäµÄ¸ß¶È£¬¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÇó³öСÎï¿éÔÚ×î¸ßµãµÄ×îСËٶȣ¬Í¨¹ýÈ«¹ý³ÌÔËÓö¯Äܶ¨ÀíÇó³öÊúÖ±Ô²¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãµÄÌõ¼þ£®
£¨2£©ÎªÁËÈÃÎï¿é²»À뿪¹ìµÀ£¬²¢ÇÒÄܹ»»¬»ØÇãб¹ìµÀAB£¬ÔòÎï¿éÉÏÉýµÄ¸ß¶ÈÐëСÓÚ»òµÈÓÚR¡ä£¬Ôò¸ù¾Ý¶¯Äܶ¨ÀíÇó³öÊúÖ±¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãµÄÌõ¼þ£®
£¨3£©¸ù¾Ý¶¯Äܶ¨ÀíÇó³öÔٴνøÈëÔ²¹ìµÀµ½´ïµÄ¸ß¶ÈºÍµÚÒ»´Î³åÉÏÔ²¹ìµÀµÄ¸ß¶È¹Øϵ£¬µÃ³öÉÏÉýn´Îºó¸ß¶ÈµÄͨÏîʽ£¬´Ó¶øµÃ³öСÎï¿é½øÈë¹ìµÀºó¿ÉÒÔÓжàÉÙ´Îͨ¹ýÔ²¹ìµÀÉϾàˮƽ¹ìµÀ¸ßΪ0£®O1mµÄijһµã£®
½â´ð£º½â£º£¨1£©ÎïÌå×öƽÅ×Ô˶¯£¬µ½´ïA´¦Ê±£¬ÁîÏÂÂäµÄ¸ß¶ÈΪh£¬Ë®Æ½·ÖËÙ¶ÈΪvx£¬ÊúÖ±·ÖËÙ¶ÈΪvy£¬ÔòÓÉƽÅ×Ô˶¯µÄ¹æÂÉ¿ÉÖª£º
£¬vx=v£¬
ÎïÌåÂäÔÚбÃæÉϺó£¬Êܵ½Ð±ÃæµÄĦ²ÁÁ¦f=¦ÌN=¦Ìmgcos37°£®
ÉèÎï¿é½øÈëÔ²¹ìµÀµ½×î¸ßµãʱÓÐ×îСËÙ¶Èv1£¬´ËʱÎï¿éÊܵ½µÄÖØÁ¦Ç¡ºÃÌṩÏòÐÄÁ¦ÁË£¬Áî¹ìµÀµÄ¹ìµÀ°ë¾¶ÎªR£®ÓÉÅ£¶ÙµÚ¶þ¶¨ÂÉÖª£¬

Îï¿é´ÓÅ׳öµ½Ô²¹ìµÀ×î¸ßµãµÄ¹ý³ÌÖУ¬Óɶ¯Äܶ¨ÀíÖª£ºmg£¨h+Lsin37°£©-¦Ìmgcos37°
ÁªÁ¢ÉÏÃæ¸÷ʽ½âµÃR=0.66m£®
ÈôÎï¿é´Óˮƽ¹ìµÀDE»¬³ö£¬ÔòÊúÖ±Ô²¹ìµÀµÄ°ë¾¶R1¡Ü0.66m£®
£¨2£©ÎªÁËÈÃÎï¿é²»À뿪¹ìµÀ£¬²¢ÇÒÄܹ»»¬»ØÇãб¹ìµÀAB£¬ÔòÎï¿éÉÏÉýµÄ¸ß¶ÈÐëСÓÚ»òµÈÓÚR¡ä£¬Ôò¸ù¾Ý¶¯Äܶ¨ÀíµÃ£¬

½âµÃR¡ä=1.65m£®
ÈôÎï¿éÄܹ»»¬»ØÇãб¹ìµÀAB£¬ÔòR2¡Ý1.65m£®
£¨3£©ÈôÎï¿é³åÉÏÔ²¹ìµÀH1=1.65m¸ß¶ÈʱËٶȱäΪ0£¬È»ºóÓÖ·µ»ØÇãб¹ìµÀh1¸ß´¦ÔÙ»¬Ï£¬È»ºóÔٴνøÈëÔ²¹ìµÀ´ïµ½µÄ¸ß¶ÈΪH2£¬ÔòÓУº


½âµÃ£®
Ö®ºóÎï¿éÔÚÊúÖ±Ô²¹ìµÀºÍÇãб¹ìµÀÖ®¼äÍù¸´Ô˶¯£¬Í¬Àí£¬n´ÎÉÏÉýµÄ¸ß¶È£¨n£¾0£©ÎªÒ»µÈ±ÈÊýÁУ®
¿É¼ûµ±n=5ʱ£¬ÉÏÉýµÄ×î´ó¸ß¶ÈСÓÚ0.01m£¬ÔòÎï¿é¹²ÓÐ8´Îͨ¹ýÔ²¹ìµÀÉϾàˮƽ¹ìµÀ¸ßΪ0.01mµÄijһµã£®
´ð£º£¨1£©ÊúÖ±Ô²¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãR1¡Ü0.66m£®
£¨2£©ÊúÖ±Ô²¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãR2¡Ý1.65m£®
£¨3£©Ð¡Îï¿é½øÈë¹ìµÀºó¿ÉÒÔÓÐ8´Îͨ¹ýÔ²¹ìµÀÉϾàˮƽ¹ìµÀ¸ßΪ0£®O1mµÄijһµã£®
µãÆÀ£º±¾Ìâ×ۺϿ¼²éÁ˶¯Äܶ¨ÀíºÍÅ£¶ÙµÚ¶þ¶¨ÂÉ£¬Éæ¼°µ½Æ½Å×Ô˶¯£¬Ö±ÏßÔ˶¯ºÍÔ²ÖÜÔ˶¯£¬×ÛºÏÐÔ½ÏÇ¿£¬¶ÔѧÉúµÄÄÜÁ¦ÒªÇó½Ï¸ß£¬Ðè¼ÓÇ¿Õâ·½ÃæµÄѵÁ·£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ΪÁËÑо¿¹ýɽ³µµÄÔ­Àí£¬Ä³ÐËȤС×éÌá³öÁËÏÂÁÐÉèÏ룺ȡһ¸öÓëˮƽ·½Ïò¼Ð½ÇΪ37¡ã¡¢³¤Îªl=2.0mµÄ´Ö²ÚÇãб¹ìµÀAB£¬Í¨¹ýˮƽ¹ìµÀBCÓëÊúÖ±Ô²¹ìµÀÏàÁ¬£¬³ö¿ÚΪˮƽ¹ìµÀDE£¬Õû¸ö¹ìµÀ³ý AB ¶ÎÒÔÍⶼÊǹ⻬µÄ£®ÆäAB ÓëBC ¹ìµÀÒÔ΢СԲ»¡Ïà½Ó£¬ÈçͼËùʾ£®Ò»¸öСÎï¿éÒÔ³õËÙ¶Èv0=4.0m/s´Óijһ¸ß´¦Ë®Æ½Å׳ö£¬µ½AµãʱËٶȷ½ÏòÇ¡ºÃÑØ AB ·½Ïò£¬²¢ÑØÇãб¹ìµÀ»¬Ï£®ÒÑÖªÎï¿éÓëÇãб¹ìµÀµÄ¶¯Ä¦²ÁÒòÊý ¦Ì=0.50£®£¨g=10m/s2¡¢sin37¡ã=0.60¡¢cos37¡ã=0.80£©
£¨1£©ÇóСÎï¿éµ½´ïAµãʱËٶȣ®
£¨2£©ÒªÊ¹Ð¡Îï¿é²»À뿪¹ìµÀ£¬²¢´Ó¹ìµÀDE»¬³ö£¬ÇóÊúÖ±Ô²»¡¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãʲôÌõ¼þ£¿
£¨3£©ÎªÁËÈÃСÎï¿é²»À뿪¹ìµÀ£¬²¢ÇÒÄܹ»»¬»ØÇãб¹ìµÀ AB£¬ÔòÊúÖ±Ô²¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãʲôÌõ¼þ£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2011?»´ÄÏһģ£©ÎªÁËÑо¿¹ýɽ³µµÄÔ­Àí£¬ÎïÀíС×éÌá³öÁËÏÂÁеÄÉèÏ룺ȡһ¸öÓëˮƽ·½Ïò¼Ð½ÇΪ37¡ã¡¢³¤ÎªL=2.0mµÄ´Ö²ÚµÄÇãб¹ìµÀAB£¬Í¨¹ýˮƽ¹ìµÀBCÓëÊúÖ±Ô²¹ìµÀÏàÁ¬£¬³ö¿ÚΪˮƽ¹ìµÀDE£¬Õû¸ö¹ìµÀ³ýAB¶ÎÒÔÍⶼÊǹ⻬µÄ£®ÆäÖÐABÓëBC¹ìµÀÒÔ΢СԲ»¡Ïà½Ó£¬ÈçͼËùʾ£®Ò»¸öСÎï¿éÒÔ³õËÙ¶Èv0=4.0m/s£¬´Óijһ¸ß´¦Ë®Æ½Å׳ö£¬µ½AµãʱËٶȷ½ÏòÇ¡ÑØAB·½Ïò£¬²¢ÑØÇãб¹ìµÀ»¬Ï£®ÒÑÖªÎï¿éÓëÇãб¹ìµÀµÄ¶¯Ä¦²ÁÒòÊý¦Ì=0.5£¨gÈ¡10m/s2£¬sin37¡ã=0.6£¬cos37¡ã=0.8£©Çó£º
£¨1£©Ð¡Îï¿éµÄÅ׳öµãºÍAµãµÄ¸ß¶È²î£»
£¨2£©ÎªÁËÈÃСÎï¿é²»À뿪¹ìµÀ£¬²¢ÇÒÄܹ»»¬»ØÇãб¹ìµÀAB£¬ÔòÊúÖ±Ô²¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãʲôÌõ¼þ£®
£¨3£©ÒªÊ¹Ð¡Îï¿é²»À뿪¹ìµÀ£¬²¢´Óˮƽ¹ìµÀDE»¬³ö£¬ÇóÊúÖ±Ô²»¡¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãʲôÌõ¼þ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ΪÁËÑо¿¹ýɽ³µµÄÔ­Àí£¬ÎïÀíС×éÌá³öÁËÏÂÃæµÄÉèÏ룺ȡһ¸öÓëˮƽ·½Ïò¼Ð½ÇΪ37¡ã¡¢³¤ÎªL=2.0mµÄ´Ö²ÚµÄÇãб¹ìµÀAB£¬Í¨¹ýˮƽ¹ìµÀBCÓëÊúÖ±Ô²¹ìµÀÏàÁ¬£¬³ö¿ÚΪˮƽ¹ìµÀDE£¬Õû¸ö¹ìµÀ³ýAB¶ÎÒÔÍⶼÊǹ⻬µÄ£®ÆäÖÐABÓëBC¹ìµÀÒÔ΢СԲ»¡Ïà½Ó£¬ÈçͼËùʾ£®Ò»¸öÎï¿éÒÔ³õËÙ¶Èv0=4.0m/s£¬´Óijһ¸ß´¦Ë®Æ½Å׳ö£¬µ½AµãʱËٶȷ½ÏòÇ¡ÑØAB·½Ïò£¬²¢ÑØÇãб¹ìµÀ»¬Ï£®ÒÑÖªÎï¿éÓëÇãб¹ìµÀ¼äµÄ¶¯Ä¦²ÁÒòÊý¦Ì=0.50£®£¨gÈ¡10m/s2£¬sin37¡ã=0.6£¬cos37¡ã=0.8£©
£¨1£©ÒªÊ¹Ð¡Îï¿é²»À뿪¹ìµÀ£¬²¢´Óˮƽ¹ìµÀDE»¬³ö£¬ÇóÊúÖ±Ô²¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãʲôÌõ¼þ£¿
£¨2£©ÎªÁËÈÃСÎï¿é²»À뿪¹ìµÀ£¬²¢ÇÒÄܹ»»¬»ØÇãб¹ìµÀAB£¬ÔòÊúÖ±Ô²¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãʲôÌõ¼þ£¿
£¨3£©Èô°´ÕÕ£¨2£©µÄÒªÇó£¬Ð¡Îï¿é½øÈë¹ìµÀºó¿ÉÒÔÓжàÉÙ´Îͨ¹ýÔ²¹ìµÀÉϾàˮƽ¹ìµÀ¸ßΪ0£®O1mµÄijһµã£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨18·Ö£©ÎªÁËÑо¿¹ýɽ³µµÄÔ­Àí£¬ÎïÀíС×éÌá³öÁËÏÂÁеÄÉèÏ룺ȡһ¸öÓëˮƽ·½Ïò¼Ð½ÇΪ37¡ã£®³¤ÎªL=2.0mµÄ´Ö²ÚµÄÇãб¹ìµÀAB£¬Í¨¹ýˮƽ¹ìµÀBCÓëÊúÖ±Ô²¹ìµÀÏàÁ¬£¬³ö¿ÚΪˮƽ¹ìµÀDE£¬Õû¸ö¹ìµÀ³ýAB¶ÎÒÔÍⶼÊǹ⻬µÄ¡£ÆäÖÐABÓëBC¹ìµÀÒÔ΢СԲ»¡Ïà½Ó£¬ÈçͼËùʾ¡£Ò»¸öСÎï¿éÒÔ³õËٶȣ¬´Óijһ¸ß´¦Ë®Æ½Å׳ö£¬µ½AµãʱËٶȷ½ÏòÇ¡ÑØAB·½Ïò£¬²¢ÑØÇãб¹ìµÀ»¬Ï¡£ÒÑÖªÎï¿éÓëÇãб¹ìµÀµÄ¶¯Ä¦²ÁÒòÊý£¨gÈ¡10m/s2£¬£©Çó£º

   £¨1£©Ð¡Îï¿éµÄÅ׳öµãºÍAµãµÄ¸ß¶È²î£»

   £¨2£©ÒªÊ¹Ð¡Îï¿é²»À뿪¹ìµÀ£¬²¢´Óˮƽ¹ìµÀDE»¬³ö£¬ÇóÊúÖ±Ô²»¡¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãʲôÌõ¼þ£»

   £¨3£©ÎªÁËÈÃСÎï¿é²»À뿪¹ìµÀ£¬²¢ÇÒÄܹ»»¬»ØÇãб¹ìµÀAB£¬ÔòÊúÖ±Ô²¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãʲôÌõ¼þ¡£

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2012-2013ѧÄêÖØÇìÊиßÈý5Ô¸߿¼Ä£ÄâÀí×ÛÎïÀíÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£º¼ÆËãÌâ

£¨16·Ö£©ÎªÁËÑо¿¹ýɽ³µµÄÔ­Àí£¬Ä³ÎïÀíС×éÌá³öÁËÏÂÁеÄÉèÏ룺ȡһ¸öÓëˮƽ·½Ïò¼Ð½ÇΪ£¬³¤ÎªµÄÇãб¹ìµÀAB£¬Í¨¹ý΢СԲ»¡Ó볤ΪµÄˮƽ¹ìµÀBCÏàÁ¬£¬È»ºóÔÚC´¦Éè¼ÆÒ»¸öÊúÖ±ÍêÕûµÄ¹â»¬Ô²¹ìµÀ£¬³ö¿ÚΪˮƽ¹ìµÀD£¬ÈçͼËùʾ¡£ÏÖ½«Ò»¸öСÇò´Ó¾àAµã¸ßΪh=0.9 mµÄˮƽ̨ÃæÉÏÒÔÒ»¶¨µÄ³õËÙ¶Èˮƽµ¯³ö£¬µ½AµãʱËٶȷ½ÏòÇ¡ÑØAB·½Ïò£¬²¢ÑØÇãб¹ìµÀ»¬Ï¡£ÒÑ֪СÇòÓëABºÍBC¼äµÄ¶¯Ä¦²ÁÒòÊý¾ùΪ¡£È¡10m/s2£¬Çó£º

£¨1£©Ð¡Çò³õËٶȵĴóС£»

£¨2£©Ð¡Çò»¬¹ýCµãʱµÄËÙÂÊ£»

£¨3£©ÒªÊ¹Ð¡Çò²»À뿪¹ìµÀ£¬ÔòÊúÖ±Ô²»¡¹ìµÀµÄ°ë¾¶Ó¦¸ÃÂú×ãʲôÌõ¼þ¡£

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸