According to principle of moments

- AIf a system of coplanar forces is in equilibrium, then their algebraic sum is zero
- BIf a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero
- CThe algebraic sum of the moments of any two forces about any point is equal to moment of the resultant about the same point
- DPositive and negative couples can be balanced

If a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero

According to principle of moments If a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero.

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