ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÈçͼΪijÓÎÀÖÉèÊ©µÄ¼ò»¯Í¼£¬¹Ì¶¨Ð±ÃæµÄÇã½Ç¦È=37£¬³¤¶ÈL=6m¡£Ä³ÓοÍ×øÔÚƽ°åС³µÉÏ£¬Í¨¹ýÀ¿ç¹ýбÃ涥¶Ë¶¨»¬ÂÖµÄÇáÉþ£¬Ê¹×Ô¼ººÍС³µÒ»Æð»ºÂýÉÏÉýµ½Ð±ÃæµÄ¶¥¶Ë£¬È»ºóËÉ¿ªÇáÉþ£¬ÈÃÈ˺ͳµÒ»ÆðÑØбÃæÏ»¬£¬×îÖÕÍ£ÔÚˮƽÃæÉϵÄPµã¡£²»¼ÆÇáÉþÓ뻬ÂÖµÄĦ²Á£¬ºöÂÔ»¬ÂÖºÍÈ˳µ´óСµÄÓ°Ï죬бÃæÓëˮƽÃæ¼äÓÃһС¶ÎÔ²»¡Æ½»¬¹ý¶É£¬ÒÑÖªÈ˵ÄÖÊÁ¿m=55kg£¬³µµÄÖÊÁ¿M=5kg£¬³µÔÚбÃ漰ˮƽÃæÉÏÔ˶¯Ê±ËùÊܵÄ×èÁ¦¾ùΪѹÁ¦µÄ0.5±¶£¬sin37=0.6£¬cos37=0.8¡£Çó£º
(1)ÉÏÉý¹ý³ÌÖУ¬È˵ÄÀÁ¦´óС£»
(2)Pµãµ½Ð±Ãæµ×¶ËµÄ¾àÀë¡£
¡¾´ð°¸¡¿(1)300N£»(2)2.4m
¡¾½âÎö¡¿
(1)ÒòÈ˳µÕûÌ建ÂýÉÏÉý£¬¹ÊÕûÌåÊÜÁ¦Æ½ºâ£¬ÑØбÃæ
´¹Ö±ÓÚбÃæ
ÇÒÓÐ
¿ÉµÃ
ÓÉÅ£¶ÙµÚÈý¶¨ÂÉ£¬È˵ÄÀÁ¦´óСΪ
(2)Ï»¬¹ý³Ì
¿ÉµÃ
a=2m/s2
ÉèÈ˳µÕûÌåµ½´ïбÃæµ×¶Ëʱ£¬ËÙ¶ÈΪv£¬ÔòÓÐ
½âµÃ
´ÓбÃæµ×¶Ëµ½Pµã£¬ÓÉ
µÃ
ÓÉ
µÃ
x=2.4m
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿