Please solve it~thx
圖片參考：http://imgcld.yimg.com/8/n/HA01132001/o/701206180043913873411050.jpg
Please solve it~thx
phy question
2012-06-19 1:56 am
回答 (1)
2012-06-19 3:38 am
✔ 最佳答案
Friction (due to gravity)= sin30 * 1500 * 10= 7500NResistive force: 200N (given)
Total Force :7500+200=7700N (opposite direction of pulling force)
Since ''uniform speed'' , net force=0 ,That mean pulling force =7700N
W=Fs
W=7700 * 100
=770000J
=770kJ
C
收錄日期: 2021-04-28 12:40:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120618000051KK00439