- #1

DIANAWIELT

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- Homework Statement
- the resultant of two forces F1 AND F2 equel R , the second force F2 reversed its direction and the resultant become square root of 3 *R find the angle between these two force?

- Relevant Equations
- the resultant of two forces F1 AND F2 equal R , the second force F2 reversed its direction and the resultant become square root of 3 *R find the angle between these two forces?

when is apply the formulae of resultant force for the two equations the angles cancel out and I can't get any value for the angle when i add the two equations:

R^=f1^2+f2^2+2f1f2cos(theta)

squart3*R=f1^2+f2^2-2f1f2cos(theta)

R^=f1^2+f2^2+2f1f2cos(theta)

squart3*R=f1^2+f2^2-2f1f2cos(theta)