what is concurrent force??

2006-10-26 5:15 pm
if two concurrent forces act in the same direction, the angle bewteen the forces is 0degree . if the two forces act in the opposite directions. the angle bewteen the forces is 180 degree.

Q:1. why is 0 degree if the forces in the same direction and 180 degree if the forces in the opposite diections?
2. how can i find the resultant?

please explain to me clearly . Be detailed .thanks

回答 (1)

2006-10-26 6:14 pm
✔ 最佳答案
concurrent 是共點,in the same direction是同一方向,亦即夾角為0度(angle bewteen the forces is 0degree),例如向東方,如果有兩個指向東方的力各為50牛頓(50N)和1400牛頓(100N),作用於同一點,該點總共受力多少呢?答案是100+50=150N向東。

如果兩個力夾成180度(the angle bewteen the forces is 180 degree),即是一個力向東而另一個力向西了,例如向東是100N而向西是50N,該點總共受力多少呢?答案是100-50=50N向東。

2.如果同方向或反方向,計算方法如上,如果是其他方向,例如夾角為30度之類便要用向量相加,例如用平衡四邊形之類的方法去相加了。


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