In fig 3, three forces F1, F2, and F3 acting at O are in equilibrium. If the magnitude of F1 is 10N,and the magnitude of F2 is 5N, find the magnitude of F3
A.
26.4N
B.
15.0N
C.
13.2N
D.
10.0N
Correct answer is C
No explanation has been provided for this answer.