1.

Two forces of equal magnitude F are at a point. If θ is the angle between two forces thenmagnitude of resultant force will be:a) zerob)F cos (0/2)c)4F cos 0d)2F cos (0/2)

Answer»

R^2 =A^2 +B^2 +2AB cosxR^2 =F^2+F^2 +2×F×F×cosxR^2=2F^2 (1+cosx)R^2 =2F^2(2cos^2 x/2)R=2F cos x/2d is correct option



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