Which of the following equations represents the resultant vector of two forces F_1 and F_2 acting at an angle $\theta$ \theta apart starting from the same origin? i.e. calculate F1 + F2. Refer to the image below for an illustration. Remember that when adding vectors, the tail of one vector needs to connect to the head of another.

Question

Answer

\sqrt{{F_1}^2\cos(	heta)+{F_2}^2\cos(	heta)}

Answer

\sqrt{{F_1}^2+{F_2}^2 -2{F_1}{F_2} \cos (	heta)}

Answer

\sqrt{{F_1}^2+{F_2}^2 +2{F_1}{F_2} \cos (	heta)}

Answer

{F_1}^2+{F_2}^2 -2{F_1}{F_2} \cos (	heta)

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Which of the following equations represents the resultant vector of two forces ...

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