Hello,我做緊physics,有一題vector唔識,請高手指點。
Two forces P→ and Q→ have a resultant force R→ with a maximum value of 60N and a minimum value of 10N. Find R→ if the angle thetaθ between P→ and Q→ is 40。.
Answer: 56.49N, 23.47。 with Q→
佢話min 10N max 60N,咁咪有好多可能性？點搵答案？
Thank you very much!!!
Physics vector question
2009-09-06 1:17 pm
回答 (1)
2009-09-06 11:51 pm
✔ 最佳答案
你試下幻想 , 如果兩個力點樣先可以達到最少或最大呢最少的則是兩個力向相反方向拉 , 這樣作用力會最少
至於最大則是兩個力各同一方向拉 .
Max = 60 N and Min = 10 N
=> |P| + |Q| = 60 N and |P| - |Q| = 10 N
=> |P| = 35 N and |Q| = 25 N .
錦之後你應該知點做.
收錄日期: 2021-04-13 16:49:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090906000051KK00307