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Question: Two forces of magnitude F have a resultant of the same magnitude F. The angle between the two forces...

Two forces of magnitude F have a resultant of the same magnitude F. The angle between the two forces is

A

45°

B

120°

C

150°

D

60°

Answer

120°

Explanation

Solution

F=(F)2+(F)2+2F.Fcos⁡θF = \sqrt{(F)^{2} + (F)^{2} + 2F.F\cos\theta}⇒ θ=120∘\theta = 120{^\circ}