求物理跟英文高手帮忙解决问题~!
一条另我很纳闷的问题.
Considerthefollowingfourforcevectors:
->F1=50.0newtons,dueeast
->F2=10.0newtons,dueeast
->F3=40.0newtons,duewest
->F4=30.0newtons,duewest
whichtwovectorsaddtogethertogivearesultantwiththesmallestmagnitude,andwhichtwovectorsaddtogivearesultantwiththelargestmagnitude?Ineachcasespecifythemagnitudeanddirectionoftheresultant.
我想要过程~各位大侠帮帮忙~