One of the conditions necessary for an object to be in equilibrium when acted upon by a number of parallel forces is that the vector sum of the forces is? By: Sunday|Published on: Nov 6|Categories: Physics JAMB| 0 comments A. Average B. Zero C. Negative D. Positive Correct Answer: Option B – Zero Users Also Read These:The resultant of two forces acting on an object is…Which of the following types of motion will be…SS2 First Term Physics Lesson Note – Equilibrium of ForcesThe resultant of two forces 12N and 5N is 13N. What…A piece of cork floating on water is acted upon by…SEE ALSO A train with an initial velocity of 20ms−¹ is subjected to a uniform deceleration of 2m−². The time required to bring the train to a complete halt is?