Two forces of magnitude 16N, are inclined at 60. Calculate the magnitude of their reactants
After you make your sketch and draw the parallogram, I would use the cosine law:
|R|^2 = 16^2 + 16^2 - 2(16)(16)cos 120°
= 512 - 256(-1/2) = 640
|R| = √640 = appr 25.3