ÔÚ2012Äê9ÔÂ11ÈÕÈÕ±¾Õþ¸®²»¹ËÖйúµÄ·´¶Ô£¬ÓëµöÓ㵺ËùνµÄ¡°ÍÁµØȨËùÓÐÕß¡±Ç©¶©¡°¹ºµººÏͬ¡±£¬¶ÔÖйú¹ÌÓÐÁìÍÁµöÓ㵺ʵʩËùν¡°¹úÓл¯¡±£® ÎªÁËά»¤¹ú¼ÒÁìÍÁÍêÕû£¬ÎÒ¹úº£¼à50¡¢15¡¢26¡¢27´¬Ö´·¨±à¶ÓÿÌìÔÚÎÒµöÓ㵺º£Óò½øÐÐÀýÐÐάȨѲº½£®¶Ô·Ç·¨½øÈëÎÒÁ캣µÄÈÕ±¾´¬Ö»½øÐмàÊÓÈ¡Ö¤£¬Í¬Ê±º°»°ÑÏÕýÉùÃ÷ÎÒ¹úÁ¢³¡£®ÈçͼËùʾ£®ÊÇÎÒ¹úº£¼à50ºÅ´¬£¬´¬³¤98Ã×£¬´¬¿í15.2Ã×£¬´¬µ×Éî7.8Ã×£¬ÂúÔØÅÅË®Á¿4000¶Ö£¬×î´óº½ËÙ13.5½Ú£¨Ô¼25km/h£©Ðøº½Á¦15000º£ÀÊÇÒ»ËÒ×°±¸¾«Á¼µÄÏÖ´ú»¯×ۺϺ£¼à´¬£®£¨º£Ë®µÄÃܶÈԼΪ1.0¡Á103kg/m3£¬£©
£¨1£©Ö´·¨±à¶ÓÒ»°ã²ÉÓÃÇ°ºóÖ´·¨ÐÎʽ£¬¶ø²»ÊDzÉÓá°²¢ÅÅ¡±Ö´·¨£¬ÕâÊÇÒòΪÁ÷ÌåÁ÷ËÙ´óµÄµØ·½Ñ¹Ç¿£¬µ±Á½´¬¸ßËÙ²¢ÅÅÐÐʻʱ£¬ÈÝÒ×·¢Éú______ʹʣ®
£¨2£©ÂúÔØʱ£¬¡°º£¼à50ºÅ¡±´¬Êܵ½µÄ¸¡Á¦Óжà´ó£¿
£¨3£©Èô´¬µ×ij´¦¾àº£ÃæµÄÉî¶ÈΪ6m£¬Ôò¸Ã´¦Êܵ½º£Ë®µÄѹǿÊǶà´ó£¿
£¨4£©¡°º£¼à50ºÅ¡±´¬ÔÚij´¦Ö´ÐÐÈÎÎñʱ£¬ÒÔ18km/hµÄËÙ¶ÈÔÈËÙº½ÐÐ6Сʱ£¬Ñ²º½µÄ·³ÌΪ¶àÉÙkm£¿ÈôѲº½Ê±º£Ë®×èÁ¦Îª1.0¡Á106Å£¶Ù£¬ÔòÕâÒ»¹ý³ÌÖ䬵ÄÍƽøÁ¦Ëù×öµÄ¹¦Îª¶àÉÙ£¿
¾«Ó¢¼Ò½ÌÍø
£¨1£©ÓÉÁ÷ÌåѹǿºÍÁ÷ËٵĹØϵ£ºÁ÷ËÙ´óµÄµØ·½Ñ¹Ç¿Ð¡£¬Á÷ËÙСµÄµØ·½Ñ¹Ç¿´ó£»
¿ÉÖª£ºÁ½´¬²¢ÅÅÐÐʻʱ£¬Á½´¬Ö®¼äµÄѹǿҪСÓÚÍâÃæµÄѹǿ£¬´Ó¶øʹÁ½´¬Ö𽥿¿½ü£¬ÓÐÏàײµÄΣÏÕ£»
£¨2£©¡ßmÅÅ=4000t=4¡Á106kg£¬
¡àÅÅ¿ªË®µÄÖØÁ¦Îª£º
GÅÅ=mÅÅg=4¡Á106kg¡Á9.8N/kg=3.92¡Á107N£¬
Ôò´¬Êܵ½µÄ¸¡Á¦F¸¡=GÅÅ=3.92¡Á107N£®
£¨3£©´¬µ×ij´¦Êܵ½º£Ë®µÄѹǿ£º
pº£Ë®=¦Ñº£Ë®gh=1.0¡Á103kg/m3¡Á9.8N/kg¡Á6m=5.88¡Á104Pa£®
£¨4£©¡ßv=
s
t
£¬
¡à¡°º£¼à50ºÅ¡±´¬Ñ²º½µÄ·³ÌΪ£º
s=vt=18km/h¡Á6h=108km£¬
¡ß´¬ÔÈËÙÐÐÊ»£¬
¡àF=f=1.0¡Á106N£¬
´¬µÄÍƽøÁ¦Ëù×öµÄ¹¦£º
W=FS=1.0¡Á106N¡Á1.08¡Á105m=1.08¡Á1011J£®
´ð£º£¨1£©Ïàײ£®
£¨2£©ÂúÔØʱ£¬¡°º£¼à50ºÅ¡±´¬Êܵ½µÄ¸¡Á¦ÓÐ3.92¡Á107N£®
£¨3£©Èô´¬µ×ij´¦¾àº£ÃæµÄÉî¶ÈΪ6m£¬Ôò¸Ã´¦Êܵ½º£Ë®µÄѹǿÊÇ5.88¡Á104Pa£®
£¨4£©¡°º£¼à50ºÅ¡±´¬ÔÚij´¦Ö´ÐÐÈÎÎñʱ£¬ÒÔ18km/hµÄËÙ¶ÈÔÈËÙº½ÐÐ6Сʱ£¬Ñ²º½µÄ·³ÌΪ108km£»
ÈôѲº½Ê±º£Ë®×èÁ¦Îª1.0¡Á106Å£¶Ù£¬ÔòÕâÒ»¹ý³ÌÖ䬵ÄÍƽøÁ¦Ëù×öµÄ¹¦Îª1.08¡Á1011J£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÔÚ2012Äê9ÔÂ11ÈÕÈÕ±¾Õþ¸®²»¹ËÖйúµÄ·´¶Ô£¬ÓëµöÓ㵺ËùνµÄ¡°ÍÁµØȨËùÓÐÕß¡±Ç©¶©¡°¹ºµººÏͬ¡±£¬¶ÔÖйú¹ÌÓÐÁìÍÁµöÓ㵺ʵʩËùν¡°¹úÓл¯¡±£® ÎªÁËά»¤¹ú¼ÒÁìÍÁÍêÕû£¬ÎÒ¹úº£¼à50¡¢15¡¢26¡¢27´¬Ö´·¨±à¶ÓÿÌìÔÚÎÒµöÓ㵺º£Óò½øÐÐÀýÐÐάȨѲº½£®¶Ô·Ç·¨½øÈëÎÒÁ캣µÄÈÕ±¾´¬Ö»½øÐмàÊÓÈ¡Ö¤£¬Í¬Ê±º°»°ÑÏÕýÉùÃ÷ÎÒ¹úÁ¢³¡£®ÈçͼËùʾ£®ÊÇÎÒ¹úº£¼à50ºÅ´¬£¬´¬³¤98Ã×£¬´¬¿í15.2Ã×£¬´¬µ×Éî7.8Ã×£¬ÂúÔØÅÅË®Á¿4000¶Ö£¬×î´óº½ËÙ13.5½Ú£¨Ô¼25km/h£©Ðøº½Á¦15000º£ÀÊÇÒ»ËÒ×°±¸¾«Á¼µÄÏÖ´ú»¯×ۺϺ£¼à´¬£®£¨º£Ë®µÄÃܶÈԼΪ1.0¡Á103kg/m3£¬£©
£¨1£©Ö´·¨±à¶ÓÒ»°ã²ÉÓÃÇ°ºóÖ´·¨ÐÎʽ£¬¶ø²»ÊDzÉÓá°²¢ÅÅ¡±Ö´·¨£¬ÕâÊÇÒòΪÁ÷ÌåÁ÷ËÙ´óµÄµØ·½Ñ¹Ç¿£¬µ±Á½´¬¸ßËÙ²¢ÅÅÐÐʻʱ£¬ÈÝÒ×·¢Éú
Ïàײ
Ïàײ
ʹʣ®
£¨2£©ÂúÔØʱ£¬¡°º£¼à50ºÅ¡±´¬Êܵ½µÄ¸¡Á¦Óжà´ó£¿
£¨3£©Èô´¬µ×ij´¦¾àº£ÃæµÄÉî¶ÈΪ6m£¬Ôò¸Ã´¦Êܵ½º£Ë®µÄѹǿÊǶà´ó£¿
£¨4£©¡°º£¼à50ºÅ¡±´¬ÔÚij´¦Ö´ÐÐÈÎÎñʱ£¬ÒÔ18km/hµÄËÙ¶ÈÔÈËÙº½ÐÐ6Сʱ£¬Ñ²º½µÄ·³ÌΪ¶àÉÙkm£¿ÈôѲº½Ê±º£Ë®×èÁ¦Îª1.0¡Á106Å£¶Ù£¬ÔòÕâÒ»¹ý³ÌÖ䬵ÄÍƽøÁ¦Ëù×öµÄ¹¦Îª¶àÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

ÔÚ2012Äê9ÔÂ11ÈÕÈÕ±¾Õþ¸®²»¹ËÖйúµÄ·´¶Ô£¬ÓëµöÓ㵺ËùνµÄ¡°ÍÁµØȨËùÓÐÕß¡±Ç©¶©¡°¹ºµººÏͬ¡±£¬¶ÔÖйú¹ÌÓÐÁìÍÁµöÓ㵺ʵʩËùν¡°¹úÓл¯¡±£® ΪÁËά»¤¹ú¼ÒÁìÍÁÍêÕû£¬ÎÒ¹úº£¼à50¡¢15¡¢26¡¢27´¬Ö´·¨±à¶ÓÿÌìÔÚÎÒµöÓ㵺º£Óò½øÐÐÀýÐÐάȨѲº½£®¶Ô·Ç·¨½øÈëÎÒÁ캣µÄÈÕ±¾´¬Ö»½øÐмàÊÓÈ¡Ö¤£¬Í¬Ê±º°»°ÑÏÕýÉùÃ÷ÎÒ¹úÁ¢³¡£®ÈçͼËùʾ£®ÊÇÎÒ¹úº£¼à50ºÅ´¬£¬´¬³¤98Ã×£¬´¬¿í15.2Ã×£¬´¬µ×Éî7.8Ã×£¬ÂúÔØÅÅË®Á¿4000¶Ö£¬×î´óº½ËÙ13.5½Ú£¨Ô¼25km/h£©Ðøº½Á¦15000º£ÀÊÇÒ»ËÒ×°±¸¾«Á¼µÄÏÖ´ú»¯×ۺϺ£¼à´¬£®£¨º£Ë®µÄÃܶÈԼΪ1.0¡Á103kg/m3£¬£©
£¨1£©Ö´·¨±à¶ÓÒ»°ã²ÉÓÃÇ°ºóÖ´·¨ÐÎʽ£¬¶ø²»ÊDzÉÓá°²¢ÅÅ¡±Ö´·¨£¬ÕâÊÇÒòΪÁ÷ÌåÁ÷ËÙ´óµÄµØ·½Ñ¹Ç¿£¬µ±Á½´¬¸ßËÙ²¢ÅÅÐÐʻʱ£¬ÈÝÒ×·¢Éú______ʹʣ®
£¨2£©ÂúÔØʱ£¬¡°º£¼à50ºÅ¡±´¬Êܵ½µÄ¸¡Á¦Óжà´ó£¿
£¨3£©Èô´¬µ×ij´¦¾àº£ÃæµÄÉî¶ÈΪ6m£¬Ôò¸Ã´¦Êܵ½º£Ë®µÄѹǿÊǶà´ó£¿
£¨4£©¡°º£¼à50ºÅ¡±´¬ÔÚij´¦Ö´ÐÐÈÎÎñʱ£¬ÒÔ18km/hµÄËÙ¶ÈÔÈËÙº½ÐÐ6Сʱ£¬Ñ²º½µÄ·³ÌΪ¶àÉÙkm£¿ÈôѲº½Ê±º£Ë®×èÁ¦Îª1.0¡Á106Å£¶Ù£¬ÔòÕâÒ»¹ý³ÌÖ䬵ÄÍƽøÁ¦Ëù×öµÄ¹¦Îª¶àÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º2012-2013ѧÄêÁÉÄþÊ¡³¯ÑôÊн¨Æ½ÏسÇÕòѧУ¾ÅÄ꼶£¨ÉÏ£©ÆÚÄ©ÎïÀíÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£º½â´ðÌâ

ÔÚ2012Äê9ÔÂ11ÈÕÈÕ±¾Õþ¸®²»¹ËÖйúµÄ·´¶Ô£¬ÓëµöÓ㵺ËùνµÄ¡°ÍÁµØȨËùÓÐÕß¡±Ç©¶©¡°¹ºµººÏͬ¡±£¬¶ÔÖйú¹ÌÓÐÁìÍÁµöÓ㵺ʵʩËùν¡°¹úÓл¯¡±£® ÎªÁËά»¤¹ú¼ÒÁìÍÁÍêÕû£¬ÎÒ¹úº£¼à50¡¢15¡¢26¡¢27´¬Ö´·¨±à¶ÓÿÌìÔÚÎÒµöÓ㵺º£Óò½øÐÐÀýÐÐάȨѲº½£®¶Ô·Ç·¨½øÈëÎÒÁ캣µÄÈÕ±¾´¬Ö»½øÐмàÊÓÈ¡Ö¤£¬Í¬Ê±º°»°ÑÏÕýÉùÃ÷ÎÒ¹úÁ¢³¡£®ÈçͼËùʾ£®ÊÇÎÒ¹úº£¼à50ºÅ´¬£¬´¬³¤98Ã×£¬´¬¿í15.2Ã×£¬´¬µ×Éî7.8Ã×£¬ÂúÔØÅÅË®Á¿4000¶Ö£¬×î´óº½ËÙ13.5½Ú£¨Ô¼25km/h£©Ðøº½Á¦15000º£ÀÊÇÒ»ËÒ×°±¸¾«Á¼µÄÏÖ´ú»¯×ۺϺ£¼à´¬£®£¨º£Ë®µÄÃܶÈԼΪ1.0×103kg/m3£¬£©
£¨1£©Ö´·¨±à¶ÓÒ»°ã²ÉÓÃÇ°ºóÖ´·¨ÐÎʽ£¬¶ø²»ÊDzÉÓá°²¢ÅÅ¡±Ö´·¨£¬ÕâÊÇÒòΪÁ÷ÌåÁ÷ËÙ´óµÄµØ·½Ñ¹Ç¿£¬µ±Á½´¬¸ßËÙ²¢ÅÅÐÐʻʱ£¬ÈÝÒ×·¢Éú______ʹʣ®
£¨2£©ÂúÔØʱ£¬¡°º£¼à50ºÅ¡±´¬Êܵ½µÄ¸¡Á¦Óжà´ó£¿
£¨3£©Èô´¬µ×ij´¦¾àº£ÃæµÄÉî¶ÈΪ6m£¬Ôò¸Ã´¦Êܵ½º£Ë®µÄѹǿÊǶà´ó£¿
£¨4£©¡°º£¼à50ºÅ¡±´¬ÔÚij´¦Ö´ÐÐÈÎÎñʱ£¬ÒÔ18km/hµÄËÙ¶ÈÔÈËÙº½ÐÐ6Сʱ£¬Ñ²º½µÄ·³ÌΪ¶àÉÙkm£¿ÈôѲº½Ê±º£Ë®×èÁ¦Îª1.0×106Å£¶Ù£¬ÔòÕâÒ»¹ý³ÌÖ䬵ÄÍƽøÁ¦Ëù×öµÄ¹¦Îª¶àÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º2012-2013ѧÄêºþÄÏʡ¦µ×ÊÐÀäË®½­ËÄÖоÅÄ꼶£¨ÉÏ£©Ô¿¼ÎïÀíÊÔ¾í£¨12Ô·ݣ©£¨½âÎö°æ£© ÌâÐÍ£º½â´ðÌâ

ÔÚ2012Äê9ÔÂ11ÈÕÈÕ±¾Õþ¸®²»¹ËÖйúµÄ·´¶Ô£¬ÓëµöÓ㵺ËùνµÄ¡°ÍÁµØȨËùÓÐÕß¡±Ç©¶©¡°¹ºµººÏͬ¡±£¬¶ÔÖйú¹ÌÓÐÁìÍÁµöÓ㵺ʵʩËùν¡°¹úÓл¯¡±£® ÎªÁËά»¤¹ú¼ÒÁìÍÁÍêÕû£¬ÎÒ¹úº£¼à50¡¢15¡¢26¡¢27´¬Ö´·¨±à¶ÓÿÌìÔÚÎÒµöÓ㵺º£Óò½øÐÐÀýÐÐάȨѲº½£®¶Ô·Ç·¨½øÈëÎÒÁ캣µÄÈÕ±¾´¬Ö»½øÐмàÊÓÈ¡Ö¤£¬Í¬Ê±º°»°ÑÏÕýÉùÃ÷ÎÒ¹úÁ¢³¡£®ÈçͼËùʾ£®ÊÇÎÒ¹úº£¼à50ºÅ´¬£¬´¬³¤98Ã×£¬´¬¿í15.2Ã×£¬´¬µ×Éî7.8Ã×£¬ÂúÔØÅÅË®Á¿4000¶Ö£¬×î´óº½ËÙ13.5½Ú£¨Ô¼25km/h£©Ðøº½Á¦15000º£ÀÊÇÒ»ËÒ×°±¸¾«Á¼µÄÏÖ´ú»¯×ۺϺ£¼à´¬£®£¨º£Ë®µÄÃܶÈԼΪ1.0×103kg/m3£¬£©
£¨1£©Ö´·¨±à¶ÓÒ»°ã²ÉÓÃÇ°ºóÖ´·¨ÐÎʽ£¬¶ø²»ÊDzÉÓá°²¢ÅÅ¡±Ö´·¨£¬ÕâÊÇÒòΪÁ÷ÌåÁ÷ËÙ´óµÄµØ·½Ñ¹Ç¿£¬µ±Á½´¬¸ßËÙ²¢ÅÅÐÐʻʱ£¬ÈÝÒ×·¢Éú______ʹʣ®
£¨2£©ÂúÔØʱ£¬¡°º£¼à50ºÅ¡±´¬Êܵ½µÄ¸¡Á¦Óжà´ó£¿
£¨3£©Èô´¬µ×ij´¦¾àº£ÃæµÄÉî¶ÈΪ6m£¬Ôò¸Ã´¦Êܵ½º£Ë®µÄѹǿÊǶà´ó£¿
£¨4£©¡°º£¼à50ºÅ¡±´¬ÔÚij´¦Ö´ÐÐÈÎÎñʱ£¬ÒÔ18km/hµÄËÙ¶ÈÔÈËÙº½ÐÐ6Сʱ£¬Ñ²º½µÄ·³ÌΪ¶àÉÙkm£¿ÈôѲº½Ê±º£Ë®×èÁ¦Îª1.0×106Å£¶Ù£¬ÔòÕâÒ»¹ý³ÌÖ䬵ÄÍƽøÁ¦Ëù×öµÄ¹¦Îª¶àÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸