vectors

Question: Two forces, ${F_1}$ and ${F_2}$ are acting on a body. One force is double that of the other force and the resultant is equal to the greater force. Then the angle between the two forces is

1) ${\cos ^{ - 1}}(1/2)$

2) ${\cos ^{ - 1}}( - 1/2)$

3) ${\cos ^{ - 1}}( - 1/4)$

4) ${\cos ^{ - 1}}(1/4)$

Solution:

Explanation: Explanation

addition-subtraction-vectors

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