Four co-planar forces of magnitudes 10N, 17N, 6N and 20N act at point O as shown in the above diagram. Determine the magnitude of the resultant force
A.
53.0N
B.
21.0N
C.
7.0N
D.
5.0N
Correct answer is D
Vertical resultant = 10 - 6 = 4N
Horizontal resultant = 20 - 17 = 3N
R = \(\sqrt{3^2 + 4^2}\)
= 5N