posted by raghavendra .
The greatest and least resultant of two forces acting at a point are 16N and 4N. If they are acting at an angle 120 degrees with one another their resultant is
A. root 38N , B.root 76N, C.root 19N, D.none
The two forces clearly have magnitudes 6 and 10.
So, use the law of cosines to get
r^2 = 100+36-120(-1/2) = 196
r = 14