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1. |
*$_For any system of coplanar forces, the condition of equilibrium is that the? |
A. | Algebraic sum of the horizontal components of all the forces should be zero |
B. | Algebraic sum of the vertical components of all the forces should be zero |
C. | Algebraic sum of moments of all the forces about any point should be zero |
D. | All of the above |
Answer» E. | |