Work Done
2014-03-14 8:32 pm
A person weighs 55 kg carries a bag that weighs 10 kg walks up a staircase 10 meters long and at an angle of 60 degrees to the horizontal ground. Find the work done of the person.
回答 (1)
2014-03-14 9:30 pm
✔ 最佳答案
W = F·SW = [mg + (10)g](10)sin60⁰
W = [(55)(10) + (10)(10)](10)sin60⁰
W = 5629 J
收錄日期: 2021-04-27 20:35:15
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https://hk.answers.yahoo.com/question/index?qid=20140314000051KK00052