有時我看見tension 是 ------> <------ 向內
有時則 <------ ------> 向外
究竟哪個才對
Thank you
tension 的方法問題
2007-10-21 10:55 pm
回答 (1)
2007-10-22 12:12 am
✔ 最佳答案
Both are correct. It depends on whether the forces are extensive or compressive.However, very often in free body diagrams, the forces marked on the diagram represent force direction acting on an object given by a string/spring, NOT the direction of force acting on the string/spring.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071021000051KK02499