Q. Two forces of magnitude $F$ have a resultant of the same magnitude $F$. The angle between the two forces is
A) $45{^\circ}$
B) $120{^\circ}$
C) $150{^\circ}$
D) $60{^\circ}$
Explanation
(b) $F = \sqrt{(F)^{2} + (F)^{2} + 2F.F\cos\theta}\ \Rightarrow \theta = 120{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.