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.N -
B.
21.0N -
C.
7.0N -
D.
5.0N
Correct Answer: Option D
Explanation
Vertical resultant = 10 – 6 = 4N
Horizontal resultant = 20 – 17 = 3N
R = (sqrt{3^2 + 4^2})
= 5N