Òº»¯Ê¯ÓÍȼÆøÆû³µ¼ò³ÆLPGÆû³µ£¬¸ÃȼÆøÆû³µµÄCOÅÅ·ÅÁ¿±ÈÆûÓͳµ¼õÉÙ90%ÒÔÉÏ£¬Ì¼Ç⻯ºÏÎïÅŷżõÉÙ70%ÒÔÉÏ£¬µªÑõ»¯ºÏÎïÅŷżõÉÙ35%ÒÔÉÏ£¬ÊÇÄ¿Ç°½ÏΪʵÓõĵÍÅÅ·ÅÆû³µ¡£ÈçÏÂͼËùʾΪһÁ¾È¼Æø³µ£¬Îª¼ìÑéɲ³µ¹¦ÄÜ£¬½øÐÐÁËÈçÏÂʵÑ飺ÔÚ·ÅÔ¿ÉÒÔÊúÆðÒ»±êÖ¾¸Ë£¬³µÒÔv0=72km/hµÄËÙ¶ÈÔÈËÙÐÐÊ»£¬µ±³µÍ·¾à±êÖ¾¸Ës=20mʱ£¬ÊµÑéÊÒ¹¤×÷ÈËÔ±Ïò˾»úÏ´ïÍ£³µµÄÖ¸Á˾»ú¾­Ê±¼ät0=0.8s£¨¼´·´Ó¦Ê±¼ä£©ºó¿ªÊ¼É²³µ£¬Èô³µÔÚ±êÖ¾¸ËÇ°Í£Ö¹Ô˶¯Ôò·ûºÏ°²È«ÒªÇó£¬ÒÑÖª³µÓë¼ÝʻԱ×ÜÖÊÁ¿ÎªM=1000kg£¬g=10m/s2¡£Çó£º

1.ɲ³µ¹ý³ÌÖеÄÖƶ¯Á¦ÖÁÉÙ¶à´ó£¿

2.ÏְѸóµ¸ÄװΪ˫¶¯Á¦ÏµÍ³£¬ÔÚƽ·ÐÐʻʱ£¬Ö»²ÉÓÃȼÆø¶¯Á¦Çý¶¯£¬·¢¶¯»úµÄ¶î¶¨¹¦ÂÊΪ15kw£¬ÄÜ»ñµÃµÄ×î´óËÙ¶ÈΪv1=15m/s¡£µ±³µÊ»ÉÏ·ÃæÇé¿öÏàͬÇã½ÇΪ37¡ã×ã¹»³¤µÄбÆÂʱ£¬²ÉÓõçÁ¦ÓëȼÆøË«¶¯Á¦ÏµÍ³·¢¶¯»úµÄ×ܹ¦ÂÊΪ34kw£¬±£³Ö¸Ã¹¦Âʲ»±ä£¬¾­¹ý20s´ïµ½×î´óËٶȣ¬Çót=45sʱ³µÑØбÃæÔ˶¯µÄ·³Ì¡££¨sin37¡ã=0.6£¬cos37¡ã=0.8£©

 

 

 

1.5¡Á104N

2.370.2m

½âÎö:£¨1£©ÔÚ·´Ó¦Ê±¼äÄÚ¼ÝʻԱÔÈËÙÔ˶¯µÄ¾àÀëΪ£ºs0=v0t0=16m £¨1·Ö£©

Èô³µÔÚ±êÖ¾¸ËÇ°Í£Ö¹Ô˶¯£¬ÓÉÔ˶¯Ñ§¹«Ê½¿ÉµÃ£º¡Üs-s0£¨1·Ö£©

¿ÉÇóµÃ£ºa¡Ý50m/s2 £¨1·Ö£©

ÓÉÅ£¶ÙµÚ¶þÔ˶¯¶¨ÂɿɵãºFÖÆ=ma¡Ý5¡Á104N £¨1·Ö£©

£¨2£©ÔÚƽ·ÐÐʻʱ»ñµÃµÄ×î´óËÙ¶Èʱ£¬Æû³µÔÈËÙÔ˶¯ÓÉ£º £¨1·Ö£©

µ±Æû³µ±£³Ö×ܹ¦Âʲ»±ä£¬ÔÚбÆÂÉÏÔ˶¯£¬´ïµ½×î´óËÙ¶ÈʱÓÉ£º(¦ÌMgcos¦È+Mgsin¦È)v2=P×Ü£¨1·Ö£©

¿ÉÇóµÃ£ºv2=5m/s£¨1·Ö£©

Óɶ¯Äܶ¨Àí¿ÉµÃ£º  £¨2·Ö£©

½âµÃ£ºs=370.2m £¨1·Ö£©

 

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

Òº»¯Ê¯ÓÍȼÆøÆû³µ¼ò³ÆLPGÆû³µ£¬¸ÃȼÆøÆû³µµÄCOÅÅ·ÅÁ¿±ÈÆûÓͳµ¼õÉÙ90%ÒÔÉÏ£¬Ì¼Ç⻯ºÏÎïÅÅ·ÅÁ¿¼õÉÙ70%ÒÔÉÏ£¬µªÑõ»¯ºÏÎïÅÅ·ÅÁ¿¼õÉÙ35%ÒÔÉÏ£¬ÊÇÄ¿Ç°½ÏΪʵÓõĵÍÅÅ·ÅÆû³µ£®Îª¼ìÑéÒ»Á¾È¼ÆøÆû³µµÄɲ³µ¹¦ÄÜ£¬½øÐÐÁËÈçÏÂʵÑ飺ÔÚ·ÅÔÊúÆðÒ»±êÖ¾¸Ë£¬³µÒÔv0=72km/hµÄËÙ¶ÈÔÈËÙÐÐÊ»£¬µ±³µÍ·¾à±êÖ¾¸Ës=20mʱ£¬ÊµÑéÊÒ¹¤×÷ÈËÔ±Ïò˾»úÏ´ïÍ£³µµÄÖ¸Á˾»ú¾­Ê±¼ät0=0.8s£¨¼´·´Ó¦Ê±¼ä£©ºó¿ªÊ¼É²³µ£¬Èô³µÔÚ±êÖ¾¸ËÇ°Í£Ö¹Ô˶¯£¬Ôò·ûºÏ°²È«ÒªÇó£¬ÒÑÖª³µÓë¼ÝʻԱ×ÜÖÊÁ¿M=l 000kg£¬g=10m/s2£®Çó£º
£¨1£©É²³µ¹ý³ÌÖеÄÖƶ¯Á¦ÖÁÉÙ¶à´ó£¿
£¨2£©ÏְѸóµ¸ÄװΪ˫¶¯Á¦ÏµÍ³£¬ÔÚƽ·ÐÐʻʱ£¬Ö»²ÉÓÃȼÆø¶¯Á¦Çý¶¯£¬·¢¶¯»úµÄ¶î¶¨¹¦ÂÊΪ15kW£¬ÄÜ»ñµÃµÄ×î´óËÙ¶Èv1=15m/s£®µ±³µÔÚ·ÃæÇé¿öÏàͬ¡¢Çã½ÇΪ370×ã¹»³¤µÄбÆÂÉÏÐÐʻʱ£¬²ÉÓõçÁ¦ÓëȼÆøË«¶¯Á¦ÏµÍ³£¬·¢¶¯»úµÄ×ܹ¦ÂÊΪ34kW£¬Ôڸù¦ÂÊϾ­¹ý20sÓɾ²Ö¹´ïµ½×î´óËٶȣ¬Çó¸Ã¹ý³ÌÖгµÑØбÃæÔ˶¯µÄ·³Ì£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£ººÓ±±Ê¡¼½ÖÝÖÐѧ2011£­2012ѧÄê¸ßÒ»ÏÂѧÆÚÆÚÖп¼ÊÔÎïÀíÀí¿ÆÊÔÌâ(A)¾í¿Æ ÌâÐÍ£º038

Òº»¯Ê¯ÓÍȼÆøÆû³µ¼ò³ÆLPGÆû³µ£¬¸ÃȼÆøÆû³µµÄCOÅÅ·ÅÁ¿±ÈÆûÓͳµ¼õÉÙ90£¥ÒÔÉÏ£¬Ì¼Ç⻯ºÏÎïÅŷżõÉÙ70£¥ÒÔÉÏ£¬µªÑõ»¯ºÏÎïÅŷżõÉÙ35£¥ÒÔÉÏ£¬ÊÇÄ¿Ç°½ÏΪʵÓõĵÍÅÅ·ÅÆû³µ£®ÈçÏÂͼËùʾΪһÁ¾È¼Æø³µ£¬ÏְѸóµ¸ÄװΪ˫¶¯Á¦ÏµÍ³£¬ÔÚƽ·ÐÐʻʱ£¬Ö»²ÉÓÃȼÆø¶¯Á¦Çý¶¯£¬·¢¶¯»úµÄ¶î¶¨¹¦ÂÊΪ15 kw£¬ÄÜ»ñµÃµÄ×î´óËÙ¶ÈΪv1£½15 m/s£®µ±³µÊ»ÉÏ·ÃæÇé¿öÏàͬ(¶¯Ä¦²ÁÒòÊýÏàͬ)Çã½ÇΪ37¡ã×ã¹»³¤µÄбÆÂʱ£¬²ÉÓõçÁ¦ÓëȼÆøË«¶¯Á¦ÏµÍ³·¢¶¯»úµÄ×ܹ¦ÂÊΪ34 kw£¬Óɾ²Ö¹¿ªÊ¼±£³Ö¸Ã¹¦Âʲ»±ä£¬¾­¹ý20 s´ïµ½×î´óËٶȣ¬Çót£½45 sʱ³µÑØбÃæÔ˶¯µÄ·³Ì£®ÒÑÖª³µÓë¼ÝʻԱ×ÜÖÊÁ¿ÎªM£½1000 kg£¬g£½10 m/s2£®(sin37¡ã£½0.6£¬cos37¡ã£½0.8)(³µËùÊÜ×èÁ¦½üËƵÈÓÚ»¬¶¯Ä¦²ÁÁ¦)

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£ºÈ˽̰æ¸ßÈýÎïÀí¶þÂÖ¸´Ï°×¨ÌâѵÁ·5 ÌâÐÍ£º¼ÆËãÌâ

Òº»¯Ê¯ÓÍȼÆøÆû³µ¼ò³ÆLPGÆû³µ£¬¸ÃȼÆøÆû³µµÄCOÅÅ·ÅÁ¿±ÈÆûÓͳµ¼õÉÙ90%ÒÔÉÏ£¬Ì¼Ç⻯ºÏÎïÅŷżõÉÙ70%ÒÔÉÏ£¬µªÑõ»¯ºÏÎïÅŷżõÉÙ35%ÒÔÉÏ£¬ÊÇÄ¿Ç°½ÏΪʵÓõĵÍÅÅ·ÅÆû³µ¡£ÈçÏÂͼËùʾΪһÁ¾È¼Æø³µ£¬Îª¼ìÑéɲ³µ¹¦ÄÜ£¬½øÐÐÁËÈçÏÂʵÑ飺ÔÚ·ÅÔ¿ÉÒÔÊúÆðÒ»±êÖ¾¸Ë£¬³µÒÔv0=72km/hµÄËÙ¶ÈÔÈËÙÐÐÊ»£¬µ±³µÍ·¾à±êÖ¾¸Ës=20mʱ£¬ÊµÑéÊÒ¹¤×÷ÈËÔ±Ïò˾»úÏ´ïÍ£³µµÄÖ¸Á˾»ú¾­Ê±¼ät0=0.8s£¨¼´·´Ó¦Ê±¼ä£©ºó¿ªÊ¼É²³µ£¬Èô³µÔÚ±êÖ¾¸ËÇ°Í£Ö¹Ô˶¯Ôò·ûºÏ°²È«ÒªÇó£¬ÒÑÖª³µÓë¼ÝʻԱ×ÜÖÊÁ¿ÎªM=1000kg£¬g=10m/s2¡£Çó£º
¡¾Ð¡Ìâ1¡¿É²³µ¹ý³ÌÖеÄÖƶ¯Á¦ÖÁÉÙ¶à´ó£¿
¡¾Ð¡Ìâ2¡¿ÏְѸóµ¸ÄװΪ˫¶¯Á¦ÏµÍ³£¬ÔÚƽ·ÐÐʻʱ£¬Ö»²ÉÓÃȼÆø¶¯Á¦Çý¶¯£¬·¢¶¯»úµÄ¶î¶¨¹¦ÂÊΪ15kw£¬ÄÜ»ñµÃµÄ×î´óËÙ¶ÈΪv1=15m/s¡£µ±³µÊ»ÉÏ·ÃæÇé¿öÏàͬÇã½ÇΪ37¡ã×ã¹»³¤µÄбÆÂʱ£¬²ÉÓõçÁ¦ÓëȼÆøË«¶¯Á¦ÏµÍ³·¢¶¯»úµÄ×ܹ¦ÂÊΪ34kw£¬±£³Ö¸Ã¹¦Âʲ»±ä£¬¾­¹ý20s´ïµ½×î´óËٶȣ¬Çót=45sʱ³µÑØбÃæÔ˶¯µÄ·³Ì¡££¨sin37¡ã=0.6£¬cos37¡ã=0.8£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£ºÈ˽̰æ¸ßÈýÎïÀí¶þÂÖ¸´Ï°×¨ÌâѵÁ·5 ÌâÐÍ£º¼ÆËãÌâ

Òº»¯Ê¯ÓÍȼÆøÆû³µ¼ò³ÆLPGÆû³µ£¬¸ÃȼÆøÆû³µµÄCOÅÅ·ÅÁ¿±ÈÆûÓͳµ¼õÉÙ90%ÒÔÉÏ£¬Ì¼Ç⻯ºÏÎïÅŷżõÉÙ70%ÒÔÉÏ£¬µªÑõ»¯ºÏÎïÅŷżõÉÙ35%ÒÔÉÏ£¬ÊÇÄ¿Ç°½ÏΪʵÓõĵÍÅÅ·ÅÆû³µ¡£ÈçÏÂͼËùʾΪһÁ¾È¼Æø³µ£¬Îª¼ìÑéɲ³µ¹¦ÄÜ£¬½øÐÐÁËÈçÏÂʵÑ飺ÔÚ·ÅÔ¿ÉÒÔÊúÆðÒ»±êÖ¾¸Ë£¬³µÒÔv0=72km/hµÄËÙ¶ÈÔÈËÙÐÐÊ»£¬µ±³µÍ·¾à±êÖ¾¸Ës=20mʱ£¬ÊµÑéÊÒ¹¤×÷ÈËÔ±Ïò˾»úÏ´ïÍ£³µµÄÖ¸Á˾»ú¾­Ê±¼ät0=0.8s£¨¼´·´Ó¦Ê±¼ä£©ºó¿ªÊ¼É²³µ£¬Èô³µÔÚ±êÖ¾¸ËÇ°Í£Ö¹Ô˶¯Ôò·ûºÏ°²È«ÒªÇó£¬ÒÑÖª³µÓë¼ÝʻԱ×ÜÖÊÁ¿ÎªM=1000kg£¬g=10m/s2¡£Çó£º

1.ɲ³µ¹ý³ÌÖеÄÖƶ¯Á¦ÖÁÉÙ¶à´ó£¿

2.ÏְѸóµ¸ÄװΪ˫¶¯Á¦ÏµÍ³£¬ÔÚƽ·ÐÐʻʱ£¬Ö»²ÉÓÃȼÆø¶¯Á¦Çý¶¯£¬·¢¶¯»úµÄ¶î¶¨¹¦ÂÊΪ15kw£¬ÄÜ»ñµÃµÄ×î´óËÙ¶ÈΪv1=15m/s¡£µ±³µÊ»ÉÏ·ÃæÇé¿öÏàͬÇã½ÇΪ37¡ã×ã¹»³¤µÄбÆÂʱ£¬²ÉÓõçÁ¦ÓëȼÆøË«¶¯Á¦ÏµÍ³·¢¶¯»úµÄ×ܹ¦ÂÊΪ34kw£¬±£³Ö¸Ã¹¦Âʲ»±ä£¬¾­¹ý20s´ïµ½×î´óËٶȣ¬Çót=45sʱ³µÑØбÃæÔ˶¯µÄ·³Ì¡££¨sin37¡ã=0.6£¬cos37¡ã=0.8£©

 

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸