求物理跟英文高手帮忙解决问题~!
一条另我很纳闷的问题.
Consider the following four force vectors:
->F1 = 50.0 newtons, due east
->F2 = 10.0 newtons, due east
->F3 = 40.0 newtons, due west
->F4 = 30.0 newtons, due west
which two vectors add together to give a resultant with the smallest magnitude, and which two vectors add to give a resultant with the largest magnitude? In each case specify the magnitude and direction of the resultant.
我想要过程~各位大侠帮帮忙~