Q. According to the law of moments, if a number of coplaner forces acting on a particle are in equilibrium, then (Solved)
1. their algebraic sum is zero
2. their lines of action are at equal distances
3. the algebraic sum of their moments about any point in their plane is zero
4. the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point
- c. the algebraic sum of their moments about any point in their plane is zero