Two equal forces ($P$ each) act at a point inclined to each other at an angle of $120^°$. The magnitude of their resultant is
Two equal forces ($P$ each) act at a point inclined to each other at an angle of $120^°$. The magnitude of their resultant is
$P/2$
$P/4$
$P$
$2P$
Two equal forces ($P$ each) act at a point inclined to each other at an angle of $120^°$. The magnitude of their resultant is
$R = \sqrt {{A^2} + {B^2} + 2AB\cos \theta } $
If $A = B = P$ and $\theta = 120^\circ $ then $R = P$