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1. |
According to the law of moments, if a number of coplanar forces acting on a particle are in equilibrium, then- |
A. | The algebraic sum of their moments about any point in their plane is zero |
B. | Their lines of action are at equal distances |
C. | The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point |
D. | Their algebraic sum is zero |
Answer» D. Their algebraic sum is zero | |