ÌâÄ¿ÄÚÈÝ
![](http://thumb.1010pic.com/pic3/upload/images/201108/8/072396b6.png)
·ÖÎö£º¶¯»¬ÂÖµÄÖØÁ¦¸ù¾Ý¹«Ê½¦ÇA=
¡Á100%=
¡Á100%=
¿ÉÇó£»
С¶«¶ÔÉþ×ÓµÄÀÁ¦ÎªF1=¸ù¾Ý¹«Ê½F=
¿ÉÇó£»
¸ù¾Ý¹«Ê½¦ÇB=
=
¿ÉÇóÎïÌåBµÄÖØÁ¦£»
ÔÈËÙÌáÉýÎïÌåAʱС¶«¶ÔµØÃæµÄѹÁ¦µÈÓÚËû×ÔÉíµÄÖØÁ¦¼õÈ¥Éþ×ÓµÄÀÁ¦£®
WA |
W×Ü |
GAh |
(GA+G¶¯)h |
GA |
GA+G¶¯ |
С¶«¶ÔÉþ×ÓµÄÀÁ¦ÎªF1=¸ù¾Ý¹«Ê½F=
GA+G¶¯ |
2 |
¸ù¾Ý¹«Ê½¦ÇB=
WB |
W×ÜB |
GB |
GB+G¶¯ |
ÔÈËÙÌáÉýÎïÌåAʱС¶«¶ÔµØÃæµÄѹÁ¦µÈÓÚËû×ÔÉíµÄÖØÁ¦¼õÈ¥Éþ×ÓµÄÀÁ¦£®
½â´ð£º½â£º¸ù¾Ýµ±ÌáÉýÎïÌåAʱ£¬»¬ÂÖ×éµÄ»úеЧÂʦÇA=
¡Á100%=
¡Á100%=
=75%£»
¿É½âµÃG¶¯=300N£¬¹ÊC´íÎó£»
С¶«¶ÔÉþ×ÓµÄÀÁ¦ÎªF1=
=
=600N£»¹ÊA´íÎó£»
ÒòΪ¦ÇB=
=
=62.5%£»
ËùÒÔGB=500N£»¹ÊB´íÎó£»
ÔÈËÙÌáÉýÎïÌåAʱС¶«¶ÔµØÃæµÄѹÁ¦F=GÈË-F1=65kg¡Á10N/kg-600N=50N£»
¹ÊDÕýÈ·£®
¹ÊÑ¡D£®
WA |
W×Ü |
GAh |
(GA+G¶¯)h |
GA |
GA+G¶¯ |
¿É½âµÃG¶¯=300N£¬¹ÊC´íÎó£»
С¶«¶ÔÉþ×ÓµÄÀÁ¦ÎªF1=
GA+G¶¯ |
2 |
90kg¡Á10N/kg+300N |
2 |
ÒòΪ¦ÇB=
WB |
W×ÜB |
GB |
GB+G¶¯ |
ËùÒÔGB=500N£»¹ÊB´íÎó£»
ÔÈËÙÌáÉýÎïÌåAʱС¶«¶ÔµØÃæµÄѹÁ¦F=GÈË-F1=65kg¡Á10N/kg-600N=50N£»
¹ÊDÕýÈ·£®
¹ÊÑ¡D£®
µãÆÀ£º±¾Ì⿼²éÀÁ¦¡¢ÖØÁ¦¡¢Ñ¹Á¦µÄ¼ÆË㣬¹Ø¼üÊǶÔÎïÌå½øÐÐÊÜÁ¦·ÖÎö£¬ÕÒ³ö¸÷ÎïÀíÁ¿Ö®¼äµÄµÈÁ¿¹Øϵ£®
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿