GENERAL KNOWLEDGE

Detailed explanation-1: -We can use the formula F=ma F = m a, where m is the mass of the particle, to solve problems about force. If a particle is resting in equilibrium then the resultant of all the forces acting on it is zero. Therefore the sum of the vectors of the forces must be equal to the zero vector.

Detailed explanation-2: -If the object is at equilibrium, then the net force acting upon the object should be 0 Newton. Thus, if all the forces are added together as vectors, then the resultant force (the vector sum) should be 0 Newton.

Detailed explanation-3: -Equilibrium of a Particle: When the net external force acting on a particle is zero, the particle is said to be in equilibrium. Applying the Newton’s First Law of Motion to this situation, we can say that the particle is either at rest or in uniform motion.

Detailed explanation-4: -A solid body submitted to three forces whose lines of action are not parallel is in equilibrium if the three following conditions apply : The lines of action are coplanar (in the same plane) The lines of action are convergent (they cross at the same point) The vector sum of these forces is equal to the zero vector.